WO2015131389A1 - Mr16 type led spotlight and dimming power source thereof - Google Patents

Mr16 type led spotlight and dimming power source thereof Download PDF

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Publication number
WO2015131389A1
WO2015131389A1 PCT/CN2014/073042 CN2014073042W WO2015131389A1 WO 2015131389 A1 WO2015131389 A1 WO 2015131389A1 CN 2014073042 W CN2014073042 W CN 2014073042W WO 2015131389 A1 WO2015131389 A1 WO 2015131389A1
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Prior art keywords
resistor
dimming
led
circuit
capacitor
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PCT/CN2014/073042
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French (fr)
Chinese (zh)
Inventor
汪发根
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深圳市众明半导体照明有限公司
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Priority to PCT/CN2014/073042 priority Critical patent/WO2015131389A1/en
Publication of WO2015131389A1 publication Critical patent/WO2015131389A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light

Definitions

  • the present invention relates to LED lamps, and more particularly to an MR16 type LED spotlight and its dimming power supply.
  • the conventional MR16 spotlight is a halogen lamp, and the halogen lamp has a special resistance characteristic with a small cold resistance, and the power is generally 20-60W.
  • the existing electronic transformers are specially designed for matching halogen lamps.
  • the power is generally 20-50W, which can provide stable high frequency 12V AC power for halogen lamps.
  • the traditional MR16 spotlights have low efficiency, high temperature rise, ultraviolet radiation, short life, low color rendering index, etc. Based on energy saving and environmental protection considerations, MR16 type LED spotlights are used as the traditional MR16 type halogen spotlights. Replacing the light source, the MR16 type LED spotlight has the advantages of energy saving and no ultraviolet radiation.
  • the MR16 type LED spotlight has a small power, generally 7W, and has a large capacity electrolytic capacitor in its input power source, which makes it appear as a capacitive load, which may cause the existing electronic transformer to enter normal operation.
  • the state for example, has no output, or the pulse signal whose output produces a very narrow effective pulse and a high current amplitude.
  • the energy output from the electronic transformer cannot guarantee that the MR16 type LED spotlight operates in a normal constant current state, thus exhibiting the MR16 type.
  • the LED spotlights are constantly flashing, making it impossible to achieve thyristor dimming and brightness adjustment.
  • the present invention is directed to the prior art, the MR16 type LED spotlight can not be matched with the existing electronic transformer, resulting in the problem of flicker during use, and the problem of dimming flicker, providing an MR16 type LED spotlight and its dimming
  • the power supply enables flicker-free and flicker-free dimming to match existing electronic transformers.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to provide a dimming power supply for an MR16 type LED spotlight, comprising:
  • a filter circuit for filtering the rectified power signal
  • a dimming detection circuit for detecting and outputting a dimming signal from the rectified and filtered power signal
  • a constant current driving circuit configured to receive the rectified and filtered power signal, generate an LED power supply and output the LED light source, and further configured to receive the dimming information, and adjust the LED power supply based on the dimming signal;
  • the current-carrying and anti-flicker circuit is used as a power source signal for the output of the rectifier circuit and the LED power supply source as a dummy load to realize the adaptation of the electronic transformer and the dimming and flicker-free.
  • the dimming power supply of the MR16 type LED spotlight of the present invention further comprises at least one of the following circuits:
  • a dimming anti-flicker circuit connected to the first input end of the rectifier circuit for limiting current of the input power source, and implementing dimming and anti-flicker;
  • An EMI filter circuit connected to the second input end of the rectifier circuit for filtering electromagnetic interference in the input power source
  • a protection circuit is coupled between the two input terminals of the rectifier circuit for absorbing spikes in the input power source.
  • the EMI filter circuit includes a second inductor, and the second inductor is coupled to a second input end of the rectifier circuit.
  • the current drawing and anti-flicker circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first MOS transistor, and a first a MOS transistor and a first capacitor; one end of the first resistor is connected to the first output end of the rectifier circuit, and the other end is connected to the gate of the first MOS transistor via the second resistor; The second output is grounded; the anode of the second diode is connected between the first resistor and the second resistor, and the cathode is connected to the gate of the first MOS transistor; a gate of the first MOS transistor, the other end of which is grounded; one end of the third resistor is connected to the positive terminal of the LED constant current driving circuit, and the other end is connected to the first diode positive electrode; the first diode a cathode of the tube is connected to the drain of the first MOS transistor; a source of the first resistor,
  • the filter circuit includes a sixth resistor, a second capacitor, and a third capacitor; one end of the sixth resistor is connected to the first output end of the rectifier circuit, and the other end is grounded via the second capacitor; One end of the third capacitor is connected to the first output end of the rectifier circuit, and the other end is grounded.
  • the LED constant current driving circuit includes a first inductor, a third diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an LED a constant current driving chip; one end of the first inductor is connected to a first output end of the rectifier circuit, and the other end is connected to a positive pole of the third diode; and a negative pole of the third diode is connected to the LED
  • the output terminal of the current driving chip is positive; the fourth capacitor is connected between the positive and negative terminals of the output end of the LED constant current driving chip; and the seventh resistor is connected between the positive and negative terminals of the output end of the LED constant current driving chip; One end of the eighth resistor is connected to the negative end of the LED constant current driving chip output terminal, and the other end is grounded; the power input end of the LED constant current driving chip is connected between the first inductor and the third diode.
  • the dimming detection circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventh capacitor, and a dimming detection chip; and one end of the eleventh resistor is connected to the rectifier circuit
  • the first output end is connected to the rectified and filtered power supply signal, and the other end is grounded via the seventh capacitor;
  • the twelfth resistor is connected at one end between the eleventh resistor and the seventh capacitor, and the other end Connecting a first input end of the dimming detecting chip;
  • the thirteenth resistor is grounded at one end, and the other end is connected to the second input end of the dimming detecting chip;
  • the first output end of the dimming detecting chip is
  • the LED constant current driving circuit is connected to output the dimming signal to the LED constant current driving circuit;
  • the second output end of the dimming detecting chip is grounded via the fourteenth resistor.
  • the dimming power supply of the MR16 type LED spotlight of the present invention further comprises:
  • a dimming protection circuit configured to turn off the LED constant current driving circuit when a voltage value of the LED power supply is greater than or equal to a threshold voltage.
  • the LED dimming protection circuit includes a third MOS transistor, an eighth capacitor, a ninth capacitor, a fifteenth resistor, a sixteenth resistor, and a Zener diode; a cathode of the Zener diode is connected to the LED a positive terminal of the output of the flow driving circuit, the positive electrode is grounded via the sixteenth resistor; the ninth capacitor and the sixteenth resistor are connected in parallel; one end of the fifteenth resistor is connected to the Zener diode and the ten Between the six resistors, the other end is connected to the gate of the third MOS transistor; the drain of the third MOS transistor is grounded, the source is grounded via the eighth capacitor; and the source of the third MOS transistor is connected
  • the LED constant current driving circuit is configured to turn off the LED constant current driving circuit when a voltage value of the LED power supply is greater than or equal to a threshold voltage.
  • An MR16 type LED spotlight comprising an LED light source, and the dimming power source of any of the above, wherein the dimming power source is disposed in the MR16 type LED spotlight.
  • the MR16 type LED spotlight and the dimming power supply thereof have the following beneficial effects: the dimming power source is built in the MR16 type LED spotlight, and the circuit of the MR16 type LED spotlight system can be smoothly matched, thereby greatly reducing the power supply volume. It saves the precious space of MR16 type LED spotlight, is convenient to install and use, greatly improves the production efficiency and reduces waste; realizes the adaptation by pulling the current and anti-flicker circuit as the false load to connect the power supply signal of the rectifier circuit and the LED power supply.
  • the traditional electronic transformer has no flicker and dimming and flicker-free function, making the MR16 LED spotlight more comfortable with human vision.
  • Figure 1 is a wiring diagram of a dimmable MR16 type LED spotlight
  • FIG. 2 is a functional block diagram of a first embodiment of a dimming power supply for an MR16 type LED spotlight of the present invention
  • FIG. 3 is a functional block diagram of a second embodiment of a dimming power supply for an MR16 type LED spotlight according to the present invention
  • FIG. 4 is a functional block diagram of a third embodiment of a dimming power supply for an MR16 type LED spotlight of the present invention.
  • Fig. 5 is a circuit diagram showing a third embodiment of the dimming power supply of the MR16 type LED spotlight of the present invention.
  • FIG. 1 is a wiring diagram of an MR16 type LED spotlight of the present invention, as shown in FIG. 1, the AC mains is sequentially passed through a dimmer (including a thyristor front cut dimmer and a MOSFET rear cut dimmer) and an electronic transformer. The MR16 type LED spotlight is then input.
  • the dimming power supply 100 is built into the MR16 type LED spotlight for powering the LED light source.
  • the dimming power supply 100 includes:
  • a filter circuit 120 configured to filter the rectified power signal
  • a dimming detection circuit 130 configured to detect and output a dimming signal from the rectified and filtered power signal
  • the constant current driving circuit 140 is configured to receive the power signal output by the filter circuit 120, generate an LED power supply and output the LED light source, and also receive the dimming information, and adjust the LED power supply based on the dimming signal;
  • the current drawing and anti-flicker circuit 150 is used as a power supply signal outputted by the dummy load to the rectifier circuit 110 and the LED power supply to realize the adaptation of the electronic transformer and the dimming and flicker free.
  • the rectifier circuit 110 includes a rectifier bridge BR1 composed of diodes D1, D2, D3, and D4.
  • the second output terminal 4 of the rectifier bridge BR1 is grounded.
  • AC power generally When it is 9.3-13.2V AC, the rectifier bridge rectifies it to DC output.
  • DC there is no need to distinguish between the positive and negative terminals (1 and 3) of the input.
  • the filter circuit 120 includes a sixth resistor R1, a second capacitor C1, and a third capacitor C20.
  • One end of the sixth resistor R1 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is grounded via the second capacitor C1.
  • One end of the third capacitor C20 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is grounded.
  • the sixth resistor R1 and the second capacitor C1 are used to filter the power signal output from the rectifier bridge BR1 to provide stable DC power to the subsequent stage circuit.
  • the second capacitor C1 is also used for energy storage, and the sixth resistor R1 is also used to limit the charging current of the second capacitor C1.
  • the third capacitor C20 has a small capacitance value for filtering spike interference in the power signal.
  • the filter circuit 120 improves the input capacitive load characteristic of the dimming power supply of the MR16 type LED spotlight, and exhibits a biasing load, which provides the electronic transformer with the first condition for normal operation, and therefore the filter circuit 120 also functions as a dimming. Anti-flicker effect.
  • the LED constant current driving circuit 140 includes a first inductor L1, a third diode D1, a fourth capacitor C2, a fifth capacitor C7, a sixth capacitor C5, a seventh resistor R18, and an eighth resistor R3.
  • One end of the first inductor L1 is connected to the first output terminal 2 of the rectifier bridge BR1 after the filter circuit 120, and the other end is connected to the anode of the third diode D1.
  • the cathode of the third diode D1 is connected to the positive terminal (LED+) of the LED constant current driving chip U1.
  • the fourth capacitor C2 is connected between the positive and negative terminals of the output end of the LED constant current driving chip U1.
  • the seventh resistor R18 is connected between the positive and negative terminals of the output end of the LED constant current driving chip U1.
  • One end of the eighth resistor R3 is connected to the negative terminal (LED-) of the LED constant current driving chip U1, and the other end is grounded.
  • the power input end of the LED constant current driving chip U1 is connected between the first inductor L1 and the third diode D1.
  • the current compensation control terminal of the LED constant current driving chip U1 is grounded via the fifth capacitor C7 and the ninth resistor R6.
  • the reference terminal of the LED constant current driving chip U1 is grounded via the sixth capacitor C5.
  • the tenth resistor R7 is connected in parallel with the sixth capacitor C5.
  • the LED constant current driving chip U1 can be implemented by the MAX16840.
  • the power input terminal of the U1 is the drain of the MAX16840 (DRANIN)
  • the current compensation control terminal is the current compensation control pin (COMP) of the MAX16840
  • the reference terminal is The reference pin (REFI) of the MAX16840 and the ground pin (GND) of U1 are grounded.
  • U1 accesses the rectified and filtered power supply signal from its power input end to generate the LED power supply that meets the requirements and outputs the LED light source through the output terminals (LED+ and LED-), and simultaneously receives the dimming signal through the reference terminal, and adjusts based on the dimming signal.
  • Output LED power supply is the rectified and filtered power supply signal from its power input end to generate the LED power supply that meets the requirements and outputs the LED light source through the output terminals (LED+ and LED-), and simultaneously receives the dimming signal through the reference terminal, and adjusts based on the dimming signal.
  • the dimming detection circuit 130 includes an eleventh resistor R4, a twelfth resistor R5, a thirteenth resistor R8, a fourteenth resistor R9, a seventh capacitor C4, and a dimming detection chip U2.
  • One end of the eleventh resistor R4 is connected to the first output end 2 of the rectifier bridge BR1 after the filter circuit 120 and between the LED constant current driving circuit 140 to access the rectified and filtered power signal, and the other end is connected to the seventh capacitor C4. Ground.
  • One end of the twelfth resistor R5 is connected between the eleventh resistor R4 and the seventh capacitor C4, and the other end is connected to the first input end of the dimming detecting chip U2.
  • the thirteenth resistor R8 is grounded at one end, and the other end is connected to the second input end of the dimming detecting chip U2.
  • the first output end of the dimming detecting chip U2 is connected to the reference end of the LED constant current driving circuit 140, and the second output end of the dimming detecting chip U2 is grounded via the fourteenth resistor R9.
  • the dimming detection chip U2 can be realized by the BCM61B or the CMKT5088, that is, the constant current mirror is used to detect the constant current dimming, and the front-cut thyristor dimming and the post-cut MOSFET dimming can be adapted.
  • the dimming signal is detected by detecting the rectified and filtered power signal through the eleventh resistor R4, the twelfth R5 and the seventh capacitor C4, and the dimming signal is introduced into the dimming detection chip from the first input end of the dimming detecting chip U2.
  • the dimming detection chip U2 generates a reference current Iref based on the dimming signal to output the LED constant current driving circuit 140 from the first output end thereof, and the sixth capacitor C5 in the LED constant current driving circuit 140 filters the reference current Iref.
  • the reference current Iref is converted into a reference voltage Vref through the tenth resistor R7 and input to the reference end of the LED constant current driving chip U1 for adjusting the LED power supply outputted by the LED constant current driving chip U1.
  • the thirteenth resistor R8 and the fourteenth resistor R9 have the same resistance value, and the current generated in the branch to which the thirteenth resistor R8 belongs is the same as the current generated in the branch to which the fourteenth resistor R9 belongs.
  • the current drawing and anti-flicker circuit 150 includes a first resistor R19, a second resistor R14, a third resistor R23, a fourth resistor R13, a fifth resistor R12, a first diode D4, and a second diode.
  • One end of the first resistor R19 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is connected to the gate of the first MOS transistor Q1 via the second resistor R14.
  • the anode of the second diode D5 is connected between the first resistor R19 and the second resistor R14, the cathode is connected to the gate of the first MOS transistor Q1, and one end of the first capacitor C8 is connected to the gate of the first MOS transistor Q1, and the other end is connected. Ground.
  • One end of the third resistor R23 is connected to the positive terminal (LED+) of the output end of the LED constant current driving circuit 140, and the other end is connected to the positive electrode of the first diode D4.
  • the cathode of the first diode D4 is connected to the drain of the first MOS transistor Q1. The source of the first MOS transistor Q1 is grounded.
  • the fourth resistor R13 is connected to the first output end of the rectifier circuit 110 at one end and to the cathode of the first diode D4 at the other end.
  • the fifth resistor R12 has one end connected to the first output end of the rectifier circuit 110 and the other end connected to the drain of the second MOS transistor Q2.
  • the gate of the second MOS transistor Q2 is connected to the cathode of the first diode D4, and the source is grounded.
  • the two MOS transistors Q2 draw current as a dummy load (even if part of the current output from the rectifier bridge BR1 flows to the ground through the above-mentioned electronic components), thereby realizing the adaptation of the electronic transformer without flicker.
  • the feedback signal outputted by the LED constant current driving chip U1 is connected through the third resistor R23 and the first diode D4, and the entire pulling current and the anti-flicker circuit 150 realize dimming and flickering as a dummy load.
  • the dimming power supply 100 of the MR16 type LED spotlight of the present invention is built in the MR16 type LED spotlight, and the MR16 type LED spotlight system circuit can be smoothly matched and greatly reduced.
  • the power supply volume saves valuable space of the MR16 type LED spotlight, is convenient to install and use, greatly improves production efficiency and reduces waste; and improves the input capacitive load characteristic of the dimming power supply of the MR16 type LED spotlight through the filter circuit 120, Let it behave as a biasing load, which provides the electronic transformer with the primary condition for normal operation, plays the role of dimming and anti-flicking; the power supply signal outputted by the current-carrying and anti-flicker circuit 150 as a dummy load to the rectifier circuit 110 and LED power supply, to achieve the traditional electronic transformer without flicker and dimming and flicker-free function, so that MR16 LED spotlights are more in line with human visual comfort.
  • FIG. 3 is a functional block diagram of a second embodiment of a dimming power supply 100 for an MR16 type LED spotlight according to the present invention.
  • the first embodiment differs from the first embodiment of the dimming power supply 100 in that the dimming power supply 100 is different.
  • the LED dimming protection circuit 160 is further configured to turn off the LED constant current driving circuit 140 when the voltage value of the LED power supply is greater than or equal to the threshold voltage, thereby protecting the LED constant current driving circuit 140 and the LED light source. .
  • the LED dimming protection circuit 160 includes a third MOS transistor Q3, an eighth capacitor C6, a ninth capacitor C9, a fifteenth resistor R15, a sixteenth resistor R16, and a Zener diode D6.
  • the cathode of the Zener diode D6 is connected to the anode of the output end of the LED constant current driving circuit 140, and the anode is grounded via the sixteenth resistor R16.
  • the ninth capacitor C9 and the sixteenth resistor R16 are connected in parallel.
  • the fifteenth resistor R15 has one end connected between the Zener diode D6 and the sixteen resistor R16, and the other end connected to the gate of the third MOS transistor Q3.
  • the drain of the third MOS transistor Q3 is grounded, the source is grounded via the eighth capacitor C6, and the source of the third MOS transistor Q3 is connected to the current compensation control terminal of the LED constant current driving chip U1.
  • the dimming protection circuit 160 detects the voltage value of the LED power supply outputted by the LED constant current driving chip U1 in real time.
  • the third MOS transistor Q3 is in the off state, when the voltage of the LED power supply is When the value is greater than or equal to the threshold voltage, the third MOS transistor Q3 is turned on.
  • the current compensation control terminal of the LED constant current driving chip U1 is grounded, and the LED constant current driving chip U1 is turned off, thereby protecting the LED constant current driving circuit 140 and The role of the LED light source.
  • the threshold voltage is determined by the Zener diode D6, the fifteenth resistor R15, the sixteenth resistor R16, and the third MOS transistor Q3.
  • the LED dimming protection circuit 160 by adding the LED dimming protection circuit 160, the voltage value of the LED power supply outputted by the LED constant current driving circuit 140 is greater than or equal to the threshold voltage. At this time, the LED constant current driving circuit 140 is turned off to function to protect the LED constant current driving circuit 140 and the LED light source.
  • FIG. 4 is a functional block diagram of a third embodiment of a dimming power supply 100 for an MR16 type LED spotlight according to the present invention. As shown in FIG. 4, the difference between the present embodiment and the second embodiment of the dimming power supply 100 is that the dimming power supply 100 Also includes:
  • a dimming anti-flicker circuit 170 is connected to the first input end of the rectifying circuit 110 for limiting current of the input power source, and implementing dimming and anti-flicking;
  • An EMI filter circuit 180 is connected to the second input end of the rectifier circuit 110 for filtering electromagnetic interference in the input power source;
  • a protection circuit 190 is coupled between the two inputs of the rectifier circuit 110 for absorbing spikes in the input power source.
  • the protection circuit 190 includes a varistor VR1 connected between the two input terminals (1 and 3) of the rectifier bridge BR1.
  • the AC distortion signal outputted by the dimmer and the electronic adapter is input to the dimming power source 100, and the AC distortion signal generates a spike interference, and the varistor VR1 is used to absorb the spike interference.
  • the protection circuit 190 can also be implemented by a transient suppression diode TVS in the same manner as the varistor VR1.
  • the dimming anti-flicker circuit 170 includes a seventeenth resistor FR1, and the seventeenth resistor FR1 is connected to the first input end 1 of the rectifier bridge BR1.
  • the resistor FR1 acts as a dummy load to limit the AC distortion signal. Prevent overcharge to achieve dimming and anti-flicker.
  • the EMI filter circuit 180 includes a second inductor L2 that is coupled to the second input terminal 3 of the rectifier bridge BR1 for filtering out electromagnetic interference.
  • the existing EMI filter circuit is composed of an inductor and a capacitor.
  • the EMI filter circuit 180 in this example can be realized only by the second inductor L2, which simplifies the circuit structure and reduces the cost.
  • the protection circuit 190 absorbs the spike interference, thereby improving the reliability of the dimming power supply 100.
  • the EMI filter circuit 180 is implemented by the second inductor L2, which simplifies the circuit structure, reduces the cost, and can effectively remove electromagnetic interference and has no pollution to the power grid.
  • the dimming power supply 100 can also be adapted to the power frequency transformer.

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Abstract

Disclosed are an MR16 type LED spotlight and a dimming power source thereof. The MR16 type LED spotlight comprises a dimming power source and an LED light source. The dimming power source comprises: a rectification circuit (110); a filter circuit (120); a dimming detection circuit (130), used for detecting a dimming signal from a rectified and filtered power signal and outputting the dimming signal; an LED constant-current driving circuit (140), used for receiving the rectified and filtered power signal, generating an LED power source and outputting the LED power source to the LED light source, and used for receiving the dimming signal and adjusting the LED power source according to the dimming signal; and a source current and anti-flicker circuit (150), used for serving as a dummy load to connect to the power signal output by the rectification circuit (110) and the LED power source. The dimming power source implements the function of adapting to an electronic transformer and the function of flicker-free dimming, so that the MR16 type LED spotlight can improve visual comfort of human beings.

Description

一种MR16型LED射灯及其调光电源  MR16 type LED spotlight and its dimming power supply 技术领域 Technical field
本发明涉及LED灯，更具体地说，涉及一种MR16型LED射灯及其调光电源。  The present invention relates to LED lamps, and more particularly to an MR16 type LED spotlight and its dimming power supply.
背景技术 Background technique
传统的MR16射灯为卤素灯，卤素灯具有冷态电阻小的特殊电阻特性，功率一般为20-60W。现有的电子变压器专门为匹配卤素灯而设计，功率一般为20-50W，能够为卤素灯提供稳定的高频12V交流电源。在卤素灯接入匹配可控硅调光器的电子变压器供电***后，通过调节可控硅调光器，可以实现卤素灯亮度从全暗到全亮的线性调节。 The conventional MR16 spotlight is a halogen lamp, and the halogen lamp has a special resistance characteristic with a small cold resistance, and the power is generally 20-60W. The existing electronic transformers are specially designed for matching halogen lamps. The power is generally 20-50W, which can provide stable high frequency 12V AC power for halogen lamps. After the halogen lamp is connected to the electronic transformer power supply system matching the thyristor dimmer, the linear adjustment of the brightness of the halogen lamp from full dark to full brightness can be realized by adjusting the thyristor dimmer.
传统的MR16射灯存在效率低、温升高、有紫外线辐射、寿命短、显色指数低、等缺陷，基于节能环保的考虑，使用MR16型的LED射灯作为传统的MR16型卤素射灯的替换光源，MR16型的LED射灯具有节能且无紫外线辐射等优点。但是，MR16型的LED射灯的功率小，一般为7W，同时其输入电源内有较大容量的电解电容，使其表现为容性负载，这样会导致现有的电子变压器无法进入正常的工作状态，例如没有输出，或者是其输出产生有效脉冲很窄，电流幅度很高的脉冲信号，电子变压器输出的能量无法保证MR16型的LED射灯工作在正常的恒流状态，从而表现为MR16型的LED射灯不停地闪烁，更无法实现可控硅调光以及亮度调节。 The traditional MR16 spotlights have low efficiency, high temperature rise, ultraviolet radiation, short life, low color rendering index, etc. Based on energy saving and environmental protection considerations, MR16 type LED spotlights are used as the traditional MR16 type halogen spotlights. Replacing the light source, the MR16 type LED spotlight has the advantages of energy saving and no ultraviolet radiation. However, the MR16 type LED spotlight has a small power, generally 7W, and has a large capacity electrolytic capacitor in its input power source, which makes it appear as a capacitive load, which may cause the existing electronic transformer to enter normal operation. The state, for example, has no output, or the pulse signal whose output produces a very narrow effective pulse and a high current amplitude. The energy output from the electronic transformer cannot guarantee that the MR16 type LED spotlight operates in a normal constant current state, thus exhibiting the MR16 type. The LED spotlights are constantly flashing, making it impossible to achieve thyristor dimming and brightness adjustment.
发明内容 Summary of the invention
本发明针对现有技术中，MR16型的LED射灯无法与现有的电子变压器匹配，导致使用过程中产生闪烁的问题，以及调光闪烁问题，提供一种MR16型LED射灯及其调光电源，能够实现与现有的电子变压器匹配使用无闪烁，以及无闪烁调光。 The present invention is directed to the prior art, the MR16 type LED spotlight can not be matched with the existing electronic transformer, resulting in the problem of flicker during use, and the problem of dimming flicker, providing an MR16 type LED spotlight and its dimming The power supply enables flicker-free and flicker-free dimming to match existing electronic transformers.
本发明解决其技术问题采用的技术方案是：提供一种MR16型LED射灯的调光电源，包括： The technical solution adopted by the present invention to solve the technical problem thereof is to provide a dimming power supply for an MR16 type LED spotlight, comprising:
整流电路，用于对输入电源进行整流； a rectifier circuit for rectifying the input power source;
滤波电路，用于对整流后的电源信号进行滤波； a filter circuit for filtering the rectified power signal;
调光检测电路，用于从整流滤波后的电源信号中检测调光信号并输出； a dimming detection circuit for detecting and outputting a dimming signal from the rectified and filtered power signal;
LED 恒流驱动电路，用于接收整流滤波后的电源信号，生成LED供电电源并输出LED光源，还用于接收所述调光信息，基于所述调光信号调整所述LED供电电源； led a constant current driving circuit, configured to receive the rectified and filtered power signal, generate an LED power supply and output the LED light source, and further configured to receive the dimming information, and adjust the LED power supply based on the dimming signal;
拉电流及防闪烁电路，用于作为假负载接入所述整流电路输出的电源信号以及所述LED供电电源，以实现适配电子变压器及调光无闪烁。 The current-carrying and anti-flicker circuit is used as a power source signal for the output of the rectifier circuit and the LED power supply source as a dummy load to realize the adaptation of the electronic transformer and the dimming and flicker-free.
优选地，本发明的MR16型LED射灯的调光电源还包括以下电路中的至少一个： Preferably, the dimming power supply of the MR16 type LED spotlight of the present invention further comprises at least one of the following circuits:
调光防闪烁电路，其连接在所述整流电路的第一输入端，用于对输入电源进行限流，从实现调光防闪烁； a dimming anti-flicker circuit connected to the first input end of the rectifier circuit for limiting current of the input power source, and implementing dimming and anti-flicker;
EMI 滤波电路，其连接在所述整流电路的第二输入端，用于滤除输入电源中的电磁干扰； An EMI filter circuit connected to the second input end of the rectifier circuit for filtering electromagnetic interference in the input power source;
保护电路，其连接在所述整流电路的两输入端之间，用于吸收输入电源中的尖峰脉冲。 A protection circuit is coupled between the two input terminals of the rectifier circuit for absorbing spikes in the input power source.
优选地，当所述调光电源包括所述EMI滤波电路时，所述EMI滤波电路包括第二电感，所述第二电感连接在所述整流电路的第二输入端。 Preferably, when the dimming power supply includes the EMI filter circuit, the EMI filter circuit includes a second inductor, and the second inductor is coupled to a second input end of the rectifier circuit.
优选地，所述拉电流及防闪烁电路包括第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第一二极管、第二二极管、第一MOS管、第二MOS管以及第一电容；所述第一电阻的一端连接所述整流电路的第一输出端，另一端经所述第二电阻连接所述第一MOS管的栅极；所述整流电路的第二输出端接地；所述第二二极管的正极连接在所述第一电阻和所述第二电阻之间，负极连接所述第一MOS管的栅极；所述第一电容一端连接所述第一MOS管的栅极，另一端接地；所述第三电阻一端连接所述LED恒流驱动电路输出端正极，另一端连接所述第一二极管正极；所述第一二极管的负极连接所述第一MOS管的漏极；所述第一MOS管的源极接地；所述第四电阻一端连接所述整流电路的第一输出端，另一端连接所述第一二极管的负极；所述第五电阻一端连接所述整流电路的第一输出端，另一端连接所述第二MOS管的漏极；所述第二MOS管的栅极接所述第一二极管的负极，源极接地。 Preferably, the current drawing and anti-flicker circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first MOS transistor, and a first a MOS transistor and a first capacitor; one end of the first resistor is connected to the first output end of the rectifier circuit, and the other end is connected to the gate of the first MOS transistor via the second resistor; The second output is grounded; the anode of the second diode is connected between the first resistor and the second resistor, and the cathode is connected to the gate of the first MOS transistor; a gate of the first MOS transistor, the other end of which is grounded; one end of the third resistor is connected to the positive terminal of the LED constant current driving circuit, and the other end is connected to the first diode positive electrode; the first diode a cathode of the tube is connected to the drain of the first MOS transistor; a source of the first MOS transistor is grounded; a fourth resistor is connected at one end to the first output end of the rectifier circuit, and the other end is connected to the first two a negative pole of the pole tube; the first end of the fifth resistor is connected to the first of the rectifier circuit The end, the other end connected to the drain of the second MOS transistor; the gate of the second MOS transistor is connected to the cathode of the first diode, the source is grounded.
优选地，所述滤波电路包括第六电阻、第二电容和第三电容；所述第六电阻的一端连接所述整流电路的第一输出端，另一端经所述第二电容接地；所述第三电容一端连接所述整流电路的第一输出端，另一端接地。 Preferably, the filter circuit includes a sixth resistor, a second capacitor, and a third capacitor; one end of the sixth resistor is connected to the first output end of the rectifier circuit, and the other end is grounded via the second capacitor; One end of the third capacitor is connected to the first output end of the rectifier circuit, and the other end is grounded.
优选地，所述LED恒流驱动电路包括第一电感、第三二极管、第四电容、第五电容、第六电容、第七电阻、第八电阻、第九电阻、第十电阻以及LED恒流驱动芯片；所述第一电感的一端连接所述整流电路的第一输出端，另一端连接所述第三二极管的正极；所述第三二极管的负极连接所述LED恒流驱动芯片的输出端正极；所述第四电容连接在所述LED恒流驱动芯片输出端正负极之间；所述第七电阻连接在所述LED恒流驱动芯片输出端正负极之间；所述第八电阻一端连接所述LED恒流驱动芯片输出端负极，另一端接地；所述LED恒流驱动芯片的电源输入端连接在所述第一电感和所述第三二极管之间，所述LED恒流驱动芯片的电流补偿控制端经所述第五电容和第九电阻接地，所述LED恒流驱动芯片的基准端经所述第六电容接地；所述第十电阻与所述第六电容并联。 Preferably, the LED constant current driving circuit includes a first inductor, a third diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an LED a constant current driving chip; one end of the first inductor is connected to a first output end of the rectifier circuit, and the other end is connected to a positive pole of the third diode; and a negative pole of the third diode is connected to the LED The output terminal of the current driving chip is positive; the fourth capacitor is connected between the positive and negative terminals of the output end of the LED constant current driving chip; and the seventh resistor is connected between the positive and negative terminals of the output end of the LED constant current driving chip; One end of the eighth resistor is connected to the negative end of the LED constant current driving chip output terminal, and the other end is grounded; the power input end of the LED constant current driving chip is connected between the first inductor and the third diode. The current compensation control end of the LED constant current driving chip is grounded via the fifth capacitor and the ninth resistor, and the reference end of the LED constant current driving chip is grounded via the sixth capacitor; the tenth resistor and the first Six capacitors in parallel.
优选地，调光检测电路包括第十一电阻、第十二电阻、第十三电阻、第十四电阻、第七电容以及调光检测芯片；所述第十一电阻一端连接所述整流电路的第一输出端以接入整流滤波后的电源信号，另一端经所述第七电容接地；所述第十二电阻一端连接在所述第十一电阻和所述第七电容之间，另一端连接所述调光检测芯片的第一输入端；所述第十三电阻一端接地，另一端连接所述调光检测芯片的第二输入端；所述调光检测芯片的第一输出端与所述LED恒流驱动电路连接，用于输出所述调光信号到所述LED恒流驱动电路；所述调光检测芯片的第二输出端经所述第十四电阻接地。 Preferably, the dimming detection circuit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventh capacitor, and a dimming detection chip; and one end of the eleventh resistor is connected to the rectifier circuit The first output end is connected to the rectified and filtered power supply signal, and the other end is grounded via the seventh capacitor; the twelfth resistor is connected at one end between the eleventh resistor and the seventh capacitor, and the other end Connecting a first input end of the dimming detecting chip; the thirteenth resistor is grounded at one end, and the other end is connected to the second input end of the dimming detecting chip; the first output end of the dimming detecting chip is The LED constant current driving circuit is connected to output the dimming signal to the LED constant current driving circuit; the second output end of the dimming detecting chip is grounded via the fourteenth resistor.
优选地，本发明的MR16型LED射灯的调光电源还包括： Preferably, the dimming power supply of the MR16 type LED spotlight of the present invention further comprises:
LED 调光保护电路，用于在所述LED供电电源的电压值大于或者等于阈值电压时，关闭所述LED恒流驱动电路。 led And a dimming protection circuit, configured to turn off the LED constant current driving circuit when a voltage value of the LED power supply is greater than or equal to a threshold voltage.
优选地，所述LED调光保护电路包括第三MOS管、第八电容、第九电容、第十五电阻、第十六电阻以及稳压二极管；所述稳压二极管的负极连接所述LED恒流驱动电路的输出端正极，正极经所述第十六电阻接地；所述第九电容和所述第十六电阻并联；所述第十五电阻一端连接在所述稳压二极管和所述十六电阻之间，另一端连接所述第三MOS管的栅极；所述第三MOS管的漏极接地，源极经所述第八电容接地；并且所述第三MOS管的源极连接所述LED恒流驱动电路，以在所述LED供电电源的电压值大于或者等于阈值电压时，关闭所述LED恒流驱动电路。 Preferably, the LED dimming protection circuit includes a third MOS transistor, an eighth capacitor, a ninth capacitor, a fifteenth resistor, a sixteenth resistor, and a Zener diode; a cathode of the Zener diode is connected to the LED a positive terminal of the output of the flow driving circuit, the positive electrode is grounded via the sixteenth resistor; the ninth capacitor and the sixteenth resistor are connected in parallel; one end of the fifteenth resistor is connected to the Zener diode and the ten Between the six resistors, the other end is connected to the gate of the third MOS transistor; the drain of the third MOS transistor is grounded, the source is grounded via the eighth capacitor; and the source of the third MOS transistor is connected The LED constant current driving circuit is configured to turn off the LED constant current driving circuit when a voltage value of the LED power supply is greater than or equal to a threshold voltage.
提供一种MR16型LED射灯，包括LED光源，以及上述任一项中的调光电源，所述调光电源设置于所述MR16型LED射灯内。 An MR16 type LED spotlight is provided, comprising an LED light source, and the dimming power source of any of the above, wherein the dimming power source is disposed in the MR16 type LED spotlight.
本发明的MR16型LED射灯及其调光电源具有以下有益效果：调光电源内置于MR16型LED射灯内，就可实现MR16型LED射灯***电路顺利匹配，大大减小了电源体积，节省了MR16型LED射灯宝贵的空间，安装使用方便，大大提高了生产效率，减少浪费；通过拉电流及防闪烁电路作为假负载接入整流电路输出的电源信号以及LED供电电源，实现适配传统的电子变压器无闪烁及调光无闪烁功能，使MR16型LED射灯更符合人类视觉的舒适度。 The MR16 type LED spotlight and the dimming power supply thereof have the following beneficial effects: the dimming power source is built in the MR16 type LED spotlight, and the circuit of the MR16 type LED spotlight system can be smoothly matched, thereby greatly reducing the power supply volume. It saves the precious space of MR16 type LED spotlight, is convenient to install and use, greatly improves the production efficiency and reduces waste; realizes the adaptation by pulling the current and anti-flicker circuit as the false load to connect the power supply signal of the rectifier circuit and the LED power supply. The traditional electronic transformer has no flicker and dimming and flicker-free function, making the MR16 LED spotlight more comfortable with human vision.
附图说明 DRAWINGS
图1为可调光的MR16型LED射灯的接线图； Figure 1 is a wiring diagram of a dimmable MR16 type LED spotlight;
图2为本发明的MR16型LED射灯的调光电源第一实施例的功能框图； 2 is a functional block diagram of a first embodiment of a dimming power supply for an MR16 type LED spotlight of the present invention;
图3为本发明的MR16型LED射灯的调光电源第二实施例的功能框图； 3 is a functional block diagram of a second embodiment of a dimming power supply for an MR16 type LED spotlight according to the present invention;
图4为本发明的MR16型LED射灯的调光电源第三实施例的功能框图； 4 is a functional block diagram of a third embodiment of a dimming power supply for an MR16 type LED spotlight of the present invention;
图5为本发明的MR16型LED射灯的调光电源第三实施例的电路图。 Fig. 5 is a circuit diagram showing a third embodiment of the dimming power supply of the MR16 type LED spotlight of the present invention.
具体实施方式 detailed description
以下结合附图和实施例对本发明做进一步的解释说明。 The invention will be further explained below in conjunction with the drawings and embodiments.
图1为本发明的MR16型LED射灯的接线图，如图1所示，交流市电依次经调光器（含可控硅前切调光器和MOSFET后切调光器）和电子变压器后输入MR16型LED射灯，在本发明的各个实施例中，调光电源100内置于MR16型LED射灯内，用于为LED光源供电。 1 is a wiring diagram of an MR16 type LED spotlight of the present invention, as shown in FIG. 1, the AC mains is sequentially passed through a dimmer (including a thyristor front cut dimmer and a MOSFET rear cut dimmer) and an electronic transformer. The MR16 type LED spotlight is then input. In various embodiments of the invention, the dimming power supply 100 is built into the MR16 type LED spotlight for powering the LED light source.
图2为本发明的MR16型LED射灯的调光电源100第一实施例的功能框图，如图2所示，在本实施例中，调光电源100包括： 2 is a functional block diagram of a first embodiment of a dimming power supply 100 for an MR16 type LED spotlight according to the present invention. As shown in FIG. 2, in the embodiment, the dimming power supply 100 includes:
整流电路110，用于对输入电源进行整流； a rectifier circuit 110 for rectifying an input power source;
滤波电路120，用于对整流后的电源信号进行滤波； a filter circuit 120, configured to filter the rectified power signal;
调光检测电路130，用于从整流滤波后的电源信号中检测调光信号并输出； a dimming detection circuit 130, configured to detect and output a dimming signal from the rectified and filtered power signal;
LED 恒流驱动电路140，用于接收滤波电路120输出的电源信号，生成LED供电电源并输出LED光源，还用于接收调光信息，基于调光信号调整LED供电电源； led The constant current driving circuit 140 is configured to receive the power signal output by the filter circuit 120, generate an LED power supply and output the LED light source, and also receive the dimming information, and adjust the LED power supply based on the dimming signal;
拉电流及防闪烁电路150，用于作为假负载接入整流电路110输出的电源信号以及LED供电电源，以实现适配电子变压器及调光无闪烁。 The current drawing and anti-flicker circuit 150 is used as a power supply signal outputted by the dummy load to the rectifier circuit 110 and the LED power supply to realize the adaptation of the electronic transformer and the dimming and flicker free.
参见图5，在本实施例中，整流电路110包括由二极管D1、D2、D3和D4组成的整流桥BR1，整流桥BR1的第二输出端4接地，当输入整流桥的电源为交流电（一般为9.3-13.2V交流电）时，整流桥将其整流为直流电后输出。当输入整流桥的电源为直流电时，无需区分输入端的正负极(1和3)。 Referring to FIG. 5, in the embodiment, the rectifier circuit 110 includes a rectifier bridge BR1 composed of diodes D1, D2, D3, and D4. The second output terminal 4 of the rectifier bridge BR1 is grounded. When the power supply to the rectifier bridge is AC power (generally When it is 9.3-13.2V AC, the rectifier bridge rectifies it to DC output. When the power supply to the rectifier bridge is DC, there is no need to distinguish between the positive and negative terminals (1 and 3) of the input.
在本实施例中，滤波电路120包括第六电阻R1、第二电容C1和第三电容C20。第六电阻R1的一端连接整流桥BR1的第一输出端2，另一端经第二电容C1接地。第三电容C20一端连接整流桥BR1的第一输出端2，另一端接地。第六电阻R1和第二电容C1用于对整流桥BR1输出的电源信号进行滤波以为后级电路提供稳定的直流电。其中，第二电容C1还用于储能，第六电阻R1还用于限制第二电容C1的充电电流，第三电容C20的电容值较小，用于滤除电源信号中的尖峰干扰。滤波电路120改善了MR16型LED射灯的调光电源的输入容性负载特性，让其表现为偏阻性负载，给电子变压器提供了正常工作的首要条件，因此滤波电路120也起到了调光防闪烁的作用。 In the embodiment, the filter circuit 120 includes a sixth resistor R1, a second capacitor C1, and a third capacitor C20. One end of the sixth resistor R1 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is grounded via the second capacitor C1. One end of the third capacitor C20 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is grounded. The sixth resistor R1 and the second capacitor C1 are used to filter the power signal output from the rectifier bridge BR1 to provide stable DC power to the subsequent stage circuit. The second capacitor C1 is also used for energy storage, and the sixth resistor R1 is also used to limit the charging current of the second capacitor C1. The third capacitor C20 has a small capacitance value for filtering spike interference in the power signal. The filter circuit 120 improves the input capacitive load characteristic of the dimming power supply of the MR16 type LED spotlight, and exhibits a biasing load, which provides the electronic transformer with the first condition for normal operation, and therefore the filter circuit 120 also functions as a dimming. Anti-flicker effect.
在本实施例中，LED恒流驱动电路140包括第一电感L1、第三二极管D1、第四电容C2、第五电容C7、第六电容C5、第七电阻R18、第八电阻R3、第九电阻R6、第十电阻R7以及LED恒流驱动芯片U1。第一电感L1的一端在滤波电路120之后连接整流桥BR1的第一输出端2，另一端连接第三二极管D1的正极。第三二极管D1的负极连接LED恒流驱动芯片U1的输出端正极（LED+）。第四电容C2连接在LED恒流驱动芯片U1输出端正负极之间。第七电阻R18连接在LED恒流驱动芯片U1输出端正负极之间。第八电阻R3一端连接LED恒流驱动芯片U1输出端负极（LED-），另一端接地。LED恒流驱动芯片U1的电源输入端连接在第一电感L1和第三二极管D1之间， LED恒流驱动芯片U1的电流补偿控制端经第五电容C7和第九电阻R6接地， LED恒流驱动芯片U1的基准端经第六电容C5接地。第十电阻R7与第六电容C5并联。 In this embodiment, the LED constant current driving circuit 140 includes a first inductor L1, a third diode D1, a fourth capacitor C2, a fifth capacitor C7, a sixth capacitor C5, a seventh resistor R18, and an eighth resistor R3. The ninth resistor R6, the tenth resistor R7, and the LED constant current drive chip U1. One end of the first inductor L1 is connected to the first output terminal 2 of the rectifier bridge BR1 after the filter circuit 120, and the other end is connected to the anode of the third diode D1. The cathode of the third diode D1 is connected to the positive terminal (LED+) of the LED constant current driving chip U1. The fourth capacitor C2 is connected between the positive and negative terminals of the output end of the LED constant current driving chip U1. The seventh resistor R18 is connected between the positive and negative terminals of the output end of the LED constant current driving chip U1. One end of the eighth resistor R3 is connected to the negative terminal (LED-) of the LED constant current driving chip U1, and the other end is grounded. The power input end of the LED constant current driving chip U1 is connected between the first inductor L1 and the third diode D1. The current compensation control terminal of the LED constant current driving chip U1 is grounded via the fifth capacitor C7 and the ninth resistor R6. The reference terminal of the LED constant current driving chip U1 is grounded via the sixth capacitor C5. The tenth resistor R7 is connected in parallel with the sixth capacitor C5.
其中，LED恒流驱动芯片U1可以采用MAX16840来实现，此时，U1的电源输入端为MAX16840的漏极（DRANIN），电流补偿控制端为MAX16840的电流补偿控制引脚（COMP），基准端为MAX16840的基准引脚（REFI），U1的接地引脚（GND）接地。U1从其电源输入端接入整流滤波后的电源信号，生成符合要求的LED供电电源并通过输出端（LED+和LED-）输出LED光源，同时通过基准端接收调光信号，基于调光信号调整输出的LED供电电源。 The LED constant current driving chip U1 can be implemented by the MAX16840. At this time, the power input terminal of the U1 is the drain of the MAX16840 (DRANIN), and the current compensation control terminal is the current compensation control pin (COMP) of the MAX16840, and the reference terminal is The reference pin (REFI) of the MAX16840 and the ground pin (GND) of U1 are grounded. U1 accesses the rectified and filtered power supply signal from its power input end to generate the LED power supply that meets the requirements and outputs the LED light source through the output terminals (LED+ and LED-), and simultaneously receives the dimming signal through the reference terminal, and adjusts based on the dimming signal. Output LED power supply.
在本实施例中，调光检测电路130包括第十一电阻R4、第十二电阻R5、第十三电阻R8、第十四电阻R9、第七电容C4以及调光检测芯片U2。第十一电阻R4一端在滤波电路120之后、LED恒流驱动电路140之间连接整流桥BR1的第一输出端2以接入整流滤波后的电源信号，另一端经第七电容C4 接地。第十二电阻R5一端连接在第十一电阻R4和第七电容C4之间，另一端连接调光检测芯片U2的第一输入端。第十三电阻R8一端接地，另一端连接调光检测芯片U2的第二输入端。调光检测芯片U2的第一输出端与LED恒流驱动电路140的基准端连接，调光检测芯片U2的第二输出端经第十四电阻R9接地。 In the present embodiment, the dimming detection circuit 130 includes an eleventh resistor R4, a twelfth resistor R5, a thirteenth resistor R8, a fourteenth resistor R9, a seventh capacitor C4, and a dimming detection chip U2. One end of the eleventh resistor R4 is connected to the first output end 2 of the rectifier bridge BR1 after the filter circuit 120 and between the LED constant current driving circuit 140 to access the rectified and filtered power signal, and the other end is connected to the seventh capacitor C4. Ground. One end of the twelfth resistor R5 is connected between the eleventh resistor R4 and the seventh capacitor C4, and the other end is connected to the first input end of the dimming detecting chip U2. The thirteenth resistor R8 is grounded at one end, and the other end is connected to the second input end of the dimming detecting chip U2. The first output end of the dimming detecting chip U2 is connected to the reference end of the LED constant current driving circuit 140, and the second output end of the dimming detecting chip U2 is grounded via the fourteenth resistor R9.
在调光检测电路130中，调光检测芯片U2可以通过BCM61B或者CMKT5088来实现，即采用了恒流镜检测恒流调光，可适配前切可控硅调光和后切MOSFET调光。通过第十一电阻R4、第十二R5和第七电容C4检测整流滤波后的电源信号中检测调光信号，并从调光检测芯片U2的第一输入端将调光信号引入调光检测芯片U2，调光检测芯片U2基于调光信号生成一参考电流Iref从其的第一输出端输出LED恒流驱动电路140，LED恒流驱动电路140中的第六电容C5对参考电流Iref进行滤波，参考电流Iref通过第十电阻R7转换为参考电压Vref输入LED恒流驱动芯片U1的基准端，用于调节LED恒流驱动芯片U1输出的LED供电电源。第十三电阻R8和第十四电阻R9阻值相同，在第十三电阻R8所属支路中产生的电流和第十四电阻R9所属支路中产生的电流值相同。 In the dimming detection circuit 130, the dimming detection chip U2 can be realized by the BCM61B or the CMKT5088, that is, the constant current mirror is used to detect the constant current dimming, and the front-cut thyristor dimming and the post-cut MOSFET dimming can be adapted. The dimming signal is detected by detecting the rectified and filtered power signal through the eleventh resistor R4, the twelfth R5 and the seventh capacitor C4, and the dimming signal is introduced into the dimming detection chip from the first input end of the dimming detecting chip U2. U2, the dimming detection chip U2 generates a reference current Iref based on the dimming signal to output the LED constant current driving circuit 140 from the first output end thereof, and the sixth capacitor C5 in the LED constant current driving circuit 140 filters the reference current Iref. The reference current Iref is converted into a reference voltage Vref through the tenth resistor R7 and input to the reference end of the LED constant current driving chip U1 for adjusting the LED power supply outputted by the LED constant current driving chip U1. The thirteenth resistor R8 and the fourteenth resistor R9 have the same resistance value, and the current generated in the branch to which the thirteenth resistor R8 belongs is the same as the current generated in the branch to which the fourteenth resistor R9 belongs.
在本实施例中，拉电流及防闪烁电路150包括第一电阻R19、第二电阻R14、第三电阻R23、第四电阻R13、第五电阻R12、第一二极管D4、第二二极管D5、第一MOS管Q1、第二MOS管Q2以及第一电容C8。第一电阻R19的一端连接整流桥BR1的第一输出端2，另一端经第二电阻R14连接第一MOS管Q1的栅极。第二二极管D5的正极连接在第一电阻R19和第二电阻R14之间，负极连接第一MOS管Q1的栅极，第一电容C8一端连接第一MOS管Q1的栅极，另一端接地。第三电阻R23一端连接LED恒流驱动电路140输出端正极（LED+），另一端连接第一二极管D4正极。第一二极管D4的负极连接第一MOS管Q1的漏极。第一MOS管Q1的源极接地。第四电阻R13一端连接整流电路110的第一输出端，另一端连接第一二极管D4的负极。第五电阻R12一端连接整流电路110的第一输出端，另一端连接第二MOS管Q2的漏极。第二MOS管Q2的栅极接第一二极管D4的负极，源极接地。 In this embodiment, the current drawing and anti-flicker circuit 150 includes a first resistor R19, a second resistor R14, a third resistor R23, a fourth resistor R13, a fifth resistor R12, a first diode D4, and a second diode. The tube D5, the first MOS transistor Q1, the second MOS transistor Q2, and the first capacitor C8. One end of the first resistor R19 is connected to the first output end 2 of the rectifier bridge BR1, and the other end is connected to the gate of the first MOS transistor Q1 via the second resistor R14. The anode of the second diode D5 is connected between the first resistor R19 and the second resistor R14, the cathode is connected to the gate of the first MOS transistor Q1, and one end of the first capacitor C8 is connected to the gate of the first MOS transistor Q1, and the other end is connected. Ground. One end of the third resistor R23 is connected to the positive terminal (LED+) of the output end of the LED constant current driving circuit 140, and the other end is connected to the positive electrode of the first diode D4. The cathode of the first diode D4 is connected to the drain of the first MOS transistor Q1. The source of the first MOS transistor Q1 is grounded. The fourth resistor R13 is connected to the first output end of the rectifier circuit 110 at one end and to the cathode of the first diode D4 at the other end. The fifth resistor R12 has one end connected to the first output end of the rectifier circuit 110 and the other end connected to the drain of the second MOS transistor Q2. The gate of the second MOS transistor Q2 is connected to the cathode of the first diode D4, and the source is grounded.
在拉电流及防闪烁电路150中，通过第一电阻R19、第二电阻R14、第四电阻R13、第五电阻R12、第二二极管D5、第一电容C8、第一MOS管Q1和第二MOS管Q2作为假负载拉电流（即使整流桥BR1输出的部分电流经上述电子元件流向地），从而实现了适配电子变压器无闪烁。通过第三电阻R23和第一二极管D4接入LED恒流驱动芯片U1输出的反馈信号，整个拉电流及防闪烁电路150作为假负载实现调光无闪烁。 In the current drawing and anti-flicker circuit 150, the first resistor R19, the second resistor R14, the fourth resistor R13, the fifth resistor R12, the second diode D5, the first capacitor C8, the first MOS transistor Q1, and the first The two MOS transistors Q2 draw current as a dummy load (even if part of the current output from the rectifier bridge BR1 flows to the ground through the above-mentioned electronic components), thereby realizing the adaptation of the electronic transformer without flicker. The feedback signal outputted by the LED constant current driving chip U1 is connected through the third resistor R23 and the first diode D4, and the entire pulling current and the anti-flicker circuit 150 realize dimming and flickering as a dummy load.
在本发明的MR16型LED射灯的调光电源100的第一实施例中，调光电源100内置于MR16型LED射灯内，就可实现MR16型LED射灯***电路顺利匹配，大大减小了电源体积，节省了MR16型LED射灯宝贵的空间，安装使用方便，大大提高了生产效率，减少浪费；通过滤波电路120改善了MR16型LED射灯的调光电源的输入容性负载特性，让其表现为偏阻性负载，给电子变压器提供了正常工作的首要条件，起到了调光防闪烁的作用；通过拉电流及防闪烁电路150作为假负载接入整流电路110输出的电源信号以及LED供电电源，实现适配传统的电子变压器无闪烁及调光无闪烁功能，使MR16型LED射灯更符合人类视觉的舒适度。 In the first embodiment of the dimming power supply 100 of the MR16 type LED spotlight of the present invention, the dimming power supply 100 is built in the MR16 type LED spotlight, and the MR16 type LED spotlight system circuit can be smoothly matched and greatly reduced. The power supply volume saves valuable space of the MR16 type LED spotlight, is convenient to install and use, greatly improves production efficiency and reduces waste; and improves the input capacitive load characteristic of the dimming power supply of the MR16 type LED spotlight through the filter circuit 120, Let it behave as a biasing load, which provides the electronic transformer with the primary condition for normal operation, plays the role of dimming and anti-flicking; the power supply signal outputted by the current-carrying and anti-flicker circuit 150 as a dummy load to the rectifier circuit 110 and LED power supply, to achieve the traditional electronic transformer without flicker and dimming and flicker-free function, so that MR16 LED spotlights are more in line with human visual comfort.
图3为本发明的MR16型LED射灯的调光电源100第二实施例的功能框图，如图3所示，本实施例与调光电源100第一实施例的区别在于，调光电源100还包括LED调光保护电路160，LED调光保护电路160用于在LED供电电源的电压值大于或者等于阈值电压时，关闭LED恒流驱动电路140，从而保护LED恒流驱动电路140和LED光源。 3 is a functional block diagram of a second embodiment of a dimming power supply 100 for an MR16 type LED spotlight according to the present invention. As shown in FIG. 3, the first embodiment differs from the first embodiment of the dimming power supply 100 in that the dimming power supply 100 is different. The LED dimming protection circuit 160 is further configured to turn off the LED constant current driving circuit 140 when the voltage value of the LED power supply is greater than or equal to the threshold voltage, thereby protecting the LED constant current driving circuit 140 and the LED light source. .
参见图5，在本实施例中，LED调光保护电路160包括第三MOS管Q3、第八电容C6、第九电容C9、第十五电阻R15、第十六电阻R16以及稳压二极管D6。稳压二极管D6的负极连接LED恒流驱动电路140的输出端正极，正极经第十六电阻R16接地。第九电容C9和第十六电阻R16并联。第十五电阻R15一端连接在稳压二极管D6和十六电阻R16之间，另一端连接第三MOS管Q3的栅极。第三MOS管Q3的漏极接地，源极经第八电容C6接地，并且第三MOS管Q3的源极连接LED恒流驱动芯片U1的电流补偿控制端。 Referring to FIG. 5, in the embodiment, the LED dimming protection circuit 160 includes a third MOS transistor Q3, an eighth capacitor C6, a ninth capacitor C9, a fifteenth resistor R15, a sixteenth resistor R16, and a Zener diode D6. The cathode of the Zener diode D6 is connected to the anode of the output end of the LED constant current driving circuit 140, and the anode is grounded via the sixteenth resistor R16. The ninth capacitor C9 and the sixteenth resistor R16 are connected in parallel. The fifteenth resistor R15 has one end connected between the Zener diode D6 and the sixteen resistor R16, and the other end connected to the gate of the third MOS transistor Q3. The drain of the third MOS transistor Q3 is grounded, the source is grounded via the eighth capacitor C6, and the source of the third MOS transistor Q3 is connected to the current compensation control terminal of the LED constant current driving chip U1.
LED 调光保护电路160实时检测LED恒流驱动芯片U1输出的LED供电电源的电压值，当LED供电电源的电压值小于阈值电压时，第三MOS管Q3处于关断状态，当LED供电电源的电压值大于或者等于阈值电压时，第三MOS管Q3导通，此时LED恒流驱动芯片U1的电流补偿控制端接地，LED恒流驱动芯片U1关闭,从而起到保护LED恒流驱动电路140和LED光源的作用。其中，阈值电压由稳压二极管D6、第十五电阻R15、第十六电阻R16和第三MOS管Q3共同决定。 led The dimming protection circuit 160 detects the voltage value of the LED power supply outputted by the LED constant current driving chip U1 in real time. When the voltage value of the LED power supply is less than the threshold voltage, the third MOS transistor Q3 is in the off state, when the voltage of the LED power supply is When the value is greater than or equal to the threshold voltage, the third MOS transistor Q3 is turned on. At this time, the current compensation control terminal of the LED constant current driving chip U1 is grounded, and the LED constant current driving chip U1 is turned off, thereby protecting the LED constant current driving circuit 140 and The role of the LED light source. The threshold voltage is determined by the Zener diode D6, the fifteenth resistor R15, the sixteenth resistor R16, and the third MOS transistor Q3.
在本发明的MR16型LED射灯的调光电源100的第二实施例中，通过增加LED调光保护电路160，在LED恒流驱动电路140输出的LED供电电源的电压值大于或者等于阈值电压时，关闭LED恒流驱动电路140，起到保护LED恒流驱动电路140和LED光源的作用。 In the second embodiment of the dimming power supply 100 of the MR16 type LED spotlight of the present invention, by adding the LED dimming protection circuit 160, the voltage value of the LED power supply outputted by the LED constant current driving circuit 140 is greater than or equal to the threshold voltage. At this time, the LED constant current driving circuit 140 is turned off to function to protect the LED constant current driving circuit 140 and the LED light source.
图4为本发明的MR16型LED射灯的调光电源100第三实施例的功能框图，如图4所示，本实施例与调光电源100第二实施例的区别在于，调光电源100还包括： 4 is a functional block diagram of a third embodiment of a dimming power supply 100 for an MR16 type LED spotlight according to the present invention. As shown in FIG. 4, the difference between the present embodiment and the second embodiment of the dimming power supply 100 is that the dimming power supply 100 Also includes:
调光防闪烁电路170，其连接在整流电路110的第一输入端，用于对输入电源进行限流，从实现调光防闪烁； a dimming anti-flicker circuit 170 is connected to the first input end of the rectifying circuit 110 for limiting current of the input power source, and implementing dimming and anti-flicking;
EMI 滤波电路180，其连接在整流电路110的第二输入端，用于滤除输入电源中的电磁干扰； An EMI filter circuit 180 is connected to the second input end of the rectifier circuit 110 for filtering electromagnetic interference in the input power source;
保护电路190，其连接在整流电路110的两输入端之间，用于吸收输入电源中的尖峰脉冲。 A protection circuit 190 is coupled between the two inputs of the rectifier circuit 110 for absorbing spikes in the input power source.
参见图5，在本实施例中，保护电路190包括压敏电阻VR1，压敏电阻VR1连接在整流桥BR1的两输入端（1和3）之间。经过调光器和电子适配器后输出的交流畸变信号输入调光电源100，该交流畸变信号会产生的尖峰脉冲干扰，压敏电阻VR1用于吸收尖峰脉冲干扰。在其他实施例中，保护电路190还可以通过瞬态抑制二极管TVS来实现，其连接方式与压敏电阻VR1相同。 Referring to FIG. 5, in the present embodiment, the protection circuit 190 includes a varistor VR1 connected between the two input terminals (1 and 3) of the rectifier bridge BR1. The AC distortion signal outputted by the dimmer and the electronic adapter is input to the dimming power source 100, and the AC distortion signal generates a spike interference, and the varistor VR1 is used to absorb the spike interference. In other embodiments, the protection circuit 190 can also be implemented by a transient suppression diode TVS in the same manner as the varistor VR1.
在本实施例中，调光防闪烁电路170包括第十七电阻FR1，第十七电阻FR1连接在整流桥BR1的第一输入端1上，电阻FR1作为假负载对交流畸变信号进行限流以防止过充从而达到调光防闪烁的目的。 In this embodiment, the dimming anti-flicker circuit 170 includes a seventeenth resistor FR1, and the seventeenth resistor FR1 is connected to the first input end 1 of the rectifier bridge BR1. The resistor FR1 acts as a dummy load to limit the AC distortion signal. Prevent overcharge to achieve dimming and anti-flicker.
在本实施例中，EMI滤波电路180包括第二电感L2，第二电感L2连接在整流桥BR1的第二输入端3，用于滤除电磁干扰。现有的EMI滤波电路由电感和电容组成，本事实例中的EMI滤波电路180可以仅仅通过第二电感L2来实现，简化了电路结构，降低了成本。 In this embodiment, the EMI filter circuit 180 includes a second inductor L2 that is coupled to the second input terminal 3 of the rectifier bridge BR1 for filtering out electromagnetic interference. The existing EMI filter circuit is composed of an inductor and a capacitor. The EMI filter circuit 180 in this example can be realized only by the second inductor L2, which simplifies the circuit structure and reduces the cost.
在本发明的MR16型LED射灯的调光电源100的第三实施例中，通过保护电路190吸收尖峰脉冲干扰，提高了调光电源100的可靠性。通过第二电感L2实现EMI滤波电路180，简化了电路结构，降低了成本，并将能够有效去除电磁干扰，对电网无污染。并且调光电源100还能够适配工频变压器。 In the third embodiment of the dimming power supply 100 of the MR16 type LED spotlight of the present invention, the protection circuit 190 absorbs the spike interference, thereby improving the reliability of the dimming power supply 100. The EMI filter circuit 180 is implemented by the second inductor L2, which simplifies the circuit structure, reduces the cost, and can effectively remove electromagnetic interference and has no pollution to the power grid. And the dimming power supply 100 can also be adapted to the power frequency transformer.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的权利要求范围之内。 The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims (10)

  1. 一种MR16型LED射灯的调光电源，包括：A dimming power supply for an MR16 type LED spotlight, comprising:
    整流电路（110），用于对输入电源进行整流；a rectifier circuit (110) for rectifying the input power source;
    滤波电路（120），用于对整流后的电源信号进行滤波；a filter circuit (120) for filtering the rectified power signal;
    其特征在于，所述调光电源还包括：The dimming power supply further includes:
    调光检测电路（130），用于从整流滤波后的电源信号中检测调光信号并输出；a dimming detection circuit (130) for detecting and outputting a dimming signal from the rectified and filtered power signal;
    LED 恒流驱动电路（140），用于接收整流滤波后的电源信号，生成LED供电电源并输出供给LED光源，还用于接收所述调光信息，基于所述调光信号调整所述LED供电电源；led a constant current driving circuit (140), configured to receive the rectified and filtered power signal, generate an LED power supply and output the LED light source, and further receive the dimming information, and adjust the LED power supply based on the dimming signal ;
    拉电流及防闪烁电路（150），用于作为假负载接入所述整流电路（110）输出的电源信号以及所述LED供电电源，以实现适配电子变压器及调光无闪烁。The current-carrying and anti-flicker circuit (150) is used as a power source signal for the output of the rectifier circuit (110) and the LED power supply source as a dummy load to realize the adaptation of the electronic transformer and the dimming and flicker-free.
  2. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，还包括以下电路中的至少一个：The dimming power supply for an MR16 type LED spotlight according to claim 1, further comprising at least one of the following circuits:
    调光防闪烁电路（170），其连接在所述整流电路（110）的第一输入端，用于对输入电源进行限流，从实现调光防闪烁；a dimming anti-flicker circuit (170) connected to the first input end of the rectifying circuit (110) for limiting the input power source, and implementing dimming and anti-flicking;
    EMI 滤波电路（180），其连接在所述整流电路（110）的第二输入端，用于滤除输入电源中的电磁干扰；EMI a filter circuit (180) connected to the second input end of the rectifier circuit (110) for filtering electromagnetic interference in the input power source;
    保护电路（190），其连接在所述整流电路（110）的两输入端之间，用于吸收输入电源中的尖峰脉冲。A protection circuit (190) is coupled between the two inputs of the rectifier circuit (110) for absorbing spikes in the input power source.
  3. 根据权利要求2所述的MR16型LED射灯的调光电源，其特征在于，当所述调光电源包括所述EMI滤波电路（180）时，所述EMI滤波电路（180）包括第二电感（L2），所述第二电感（L2）连接在所述整流电路（110）的第二输入端。The dimming power supply for an MR16 type LED spotlight according to claim 2, wherein when said dimming power supply comprises said EMI filter circuit (180), said EMI filter circuit (180) comprises a second inductor (L2), the second inductor (L2) is connected to the second input terminal of the rectifier circuit (110).
  4. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，所述拉电流及防闪烁电路（150）包括第一电阻（R19）、第二电阻（R14）、第三电阻（R23）、第四电阻（R13）、第五电阻（R12）、第一二极管（D4）、第二二极管（D5）、第一MOS管（Q1）、第二MOS管（Q2）以及第一电容（C8）；所述第一电阻（R19）的一端连接所述整流电路（110）的第一输出端，另一端经所述第二电阻（R14）连接所述第一MOS管（Q1）的栅极；所述整流电路（110）的第二输出端接地；所述第二二极管（D5）的正极连接在所述第一电阻（R19）和所述第二电阻（R14）之间，负极连接所述第一MOS管（Q1）的栅极；所述第一电容（C8）一端连接所述第一MOS管（Q1）的栅极，另一端接地；所述第三电阻（R23）一端连接所述LED恒流驱动电路（140）输出端正极，另一端连接所述第一二极管（D4）正极；所述第一二极管（D4）的负极连接所述第一MOS管（Q1）的漏极；所述第一MOS管（Q1）的源极接地；所述第四电阻（R13）一端连接所述整流电路（110）的第一输出端，另一端连接所述第一二极管（D4）的负极；所述第五电阻（R12）一端连接所述整流电路（110）的第一输出端，另一端连接所述第二MOS管（Q2）的漏极；所述第二MOS管（Q2）的栅极接所述第一二极管（D4）的负极，源极接地。The dimming power supply for an MR16 type LED spotlight according to claim 1, wherein the current drawing and anti-flicker circuit (150) comprises a first resistor (R19), a second resistor (R14), and a third resistor. (R23), fourth resistor (R13), fifth resistor (R12), first diode (D4), second diode (D5), first MOS transistor (Q1), second MOS transistor (Q2 And a first capacitor (C8); one end of the first resistor (R19) is connected to the first output end of the rectifier circuit (110), and the other end is connected to the first MOS via the second resistor (R14) a gate of the tube (Q1); a second output of the rectifier circuit (110) is grounded; a cathode of the second diode (D5) is coupled to the first resistor (R19) and the second resistor Between (R14), a negative electrode is connected to a gate of the first MOS transistor (Q1); one end of the first capacitor (C8) is connected to a gate of the first MOS transistor (Q1), and the other end is grounded; One end of the third resistor (R23) is connected to the positive terminal of the output end of the LED constant current driving circuit (140), and the other end is connected to the positive electrode of the first diode (D4). a cathode of the first diode (D4) is connected to a drain of the first MOS transistor (Q1); a source of the first MOS transistor (Q1) is grounded; and a fourth resistor (R13) is connected at one end. a first output end of the rectifier circuit (110), the other end of which is connected to a negative pole of the first diode (D4); and one end of the fifth resistor (R12) is connected to a first output of the rectifier circuit (110) The other end is connected to the drain of the second MOS transistor (Q2); the gate of the second MOS transistor (Q2) is connected to the cathode of the first diode (D4), and the source is grounded.
  5. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，所述滤波电路（120）包括第六电阻（R1）、第二电容（C1）和第三电容（C20）；所述第六电阻（R1）的一端连接所述整流电路（110）的第一输出端，另一端经所述第二电容（C1）接地；所述第三电容（C20）一端连接所述整流电路（110）的第一输出端，另一端接地。The dimming power supply for an MR16 type LED spotlight according to claim 1, wherein the filter circuit (120) comprises a sixth resistor (R1), a second capacitor (C1), and a third capacitor (C20); One end of the sixth resistor (R1) is connected to the first output end of the rectifier circuit (110), the other end is grounded via the second capacitor (C1); and one end of the third capacitor (C20) is connected to the rectification The first output of the circuit (110) is grounded at the other end.
  6. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，所述LED恒流驱动电路（140）包括第一电感（L1）、第三二极管（D1）、第四电容（C2）、第五电容（C7）、第六电容（C5）、第七电阻（R18）、第八电阻（R3）、第九电阻（R6）、第十电阻（R7）以及LED恒流驱动芯片（U1）；所述第一电感（L1）的一端连接所述整流电路（110）的第一输出端，另一端连接所述第三二极管（D1）的正极；所述第三二极管（D1）的负极连接所述LED恒流驱动芯片（U1）的输出端正极；所述第四电容（C2）连接在所述LED恒流驱动芯片（U1）输出端正负极之间；所述第七电阻（R18）连接在所述LED恒流驱动芯片（U1）输出端正负极之间；所述第八电阻（R3）一端连接所述LED恒流驱动芯片（U1）输出端负极，另一端接地；所述LED恒流驱动芯片（U1）的电源输入端连接在所述第一电感（L1）和所述第三二极管（D1）之间，所述LED恒流驱动芯片（U1）的电流补偿控制端经所述第五电容（C7）和第九电阻（R6）接地，所述LED恒流驱动芯片（U1）的基准端经所述第六电容（C5）接地；所述第十电阻（R7）与所述第六电容（C5）并联。The dimming power supply for an MR16 type LED spotlight according to claim 1, wherein the LED constant current driving circuit (140) comprises a first inductor (L1), a third diode (D1), and a fourth Capacitor (C2), fifth capacitor (C7), sixth capacitor (C5), seventh resistor (R18), eighth resistor (R3), ninth resistor (R6), tenth resistor (R7), and LED constant current a driving chip (U1); one end of the first inductor (L1) is connected to a first output end of the rectifier circuit (110), and the other end is connected to a positive terminal of the third diode (D1); a cathode of the diode (D1) is connected to the positive terminal of the output end of the LED constant current driving chip (U1); the fourth capacitor (C2) is connected between the positive and negative terminals of the output end of the LED constant current driving chip (U1); The seventh resistor (R18) is connected between the positive and negative terminals of the output end of the LED constant current driving chip (U1); one end of the eighth resistor (R3) is connected to the negative terminal of the output end of the LED constant current driving chip (U1). The other end is grounded; the power input end of the LED constant current driving chip (U1) is connected to the first inductor ( Between L1) and the third diode (D1), the current compensation control terminal of the LED constant current driving chip (U1) is grounded via the fifth capacitor (C7) and the ninth resistor (R6). The reference terminal of the LED constant current driving chip (U1) is grounded via the sixth capacitor (C5); the tenth resistor (R7) is connected in parallel with the sixth capacitor (C5).
  7. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，调光检测电路（130）包括第十一电阻（R4）、第十二电阻（R5）、第十三电阻（R8）、第十四电阻（R9）、第七电容（C4）以及调光检测芯片（U2）；所述第十一电阻（R4）一端连接所述整流电路（110）的第一输出端以接入整流滤波后的电源信号，另一端经所述第七电容（C4） 接地；所述第十二电阻（R5）一端连接在所述第十一电阻（R4）和所述第七电容（C4）之间，另一端连接所述调光检测芯片（U2）的第一输入端；所述第十三电阻（R8）一端接地，另一端连接所述调光检测芯片（U2）的第二输入端；所述调光检测芯片（U2）的第一输出端与所述LED恒流驱动电路（140）连接，用于输出所述调光信号到所述LED恒流驱动电路（140）；所述调光检测芯片（U2）的第二输出端经所述第十四电阻（R9）接地。The dimming power supply for an MR16 type LED spotlight according to claim 1, wherein the dimming detection circuit (130) comprises an eleventh resistor (R4), a twelfth resistor (R5), and a thirteenth resistor ( R8), a fourteenth resistor (R9), a seventh capacitor (C4), and a dimming detection chip (U2); one end of the eleventh resistor (R4) is connected to the first output end of the rectifier circuit (110) Connect to the rectified and filtered power signal, and the other end passes through the seventh capacitor (C4) Grounding; one end of the twelfth resistor (R5) is connected between the eleventh resistor (R4) and the seventh capacitor (C4), and the other end is connected to the first of the dimming detection chip (U2) The first end of the thirteenth resistor (R8) is connected to the second input end of the dimming detection chip An LED constant current driving circuit (140) is connected to output the dimming signal to the LED constant current driving circuit (140); the second output end of the dimming detecting chip (U2) is through the fourteenth The resistor (R9) is grounded.
  8. 根据权利要求1所述的MR16型LED射灯的调光电源，其特征在于，还包括：The dimming power supply for an MR16 type LED spotlight according to claim 1, further comprising:
    LED 调光保护电路（160），用于在所述LED供电电源的电压值大于或者等于阈值电压时，关闭所述LED恒流驱动电路（140）。led The dimming protection circuit (160) is configured to turn off the LED constant current driving circuit (140) when a voltage value of the LED power supply is greater than or equal to a threshold voltage.
  9. 根据权利要求8所述的MR16型LED射灯的调光电源，其特征在于，所述LED调光保护电路（160）包括第三MOS管（Q3）、第八电容（C6）、第九电容（C9）、第十五电阻（R15）、第十六电阻（R16）以及稳压二极管（D6）；所述稳压二极管（D6）的负极连接所述LED恒流驱动电路（140）的输出端正极，正极经所述第十六电阻（R16）接地；所述第九电容（C9）和所述第十六电阻（R16）并联；所述第十五电阻（R15）一端连接在所述稳压二极管（D6）和所述十六电阻（R16）之间，另一端连接所述第三MOS管（Q3）的栅极；所述第三MOS管（Q3）的漏极接地，源极经所述第八电容（C6）接地；并且所述第三MOS管（Q3）的源极连接所述LED恒流驱动电路（140），以在所述LED供电电源的电压值大于或者等于阈值电压时，关闭所述LED恒流驱动电路（140）。The dimming power supply for an MR16 type LED spotlight according to claim 8, wherein the LED dimming protection circuit (160) comprises a third MOS transistor (Q3), an eighth capacitor (C6), and a ninth capacitor. (C9), a fifteenth resistor (R15), a sixteenth resistor (R16), and a Zener diode (D6); a cathode of the Zener diode (D6) is connected to an output of the LED constant current driving circuit (140) a positive electrode, the positive electrode is grounded via the sixteenth resistor (R16); the ninth capacitor (C9) and the sixteenth resistor (R16) are connected in parallel; one end of the fifteenth resistor (R15) is connected to Between the Zener diode (D6) and the sixteen resistor (R16), the other end is connected to the gate of the third MOS transistor (Q3); the drain of the third MOS transistor (Q3) is grounded, the source The eighth capacitor (C6) is grounded; and the source of the third MOS transistor (Q3) is connected to the LED constant current driving circuit (140), so that the voltage value of the LED power supply is greater than or equal to a threshold At the time of voltage, the LED constant current driving circuit (140) is turned off.
  10. 一种MR16型LED射灯，包括LED光源，其特征在于，所述MR16型LED射灯还包括权利要求1-9中任一项所述的调光电源，所述调光电源设置于所述MR16型LED射灯内。An MR16 type LED spotlight, comprising an LED light source, wherein the MR16 type LED spotlight further comprises the dimming power supply according to any one of claims 1-9, wherein the dimming power supply is disposed in the MR16 type LED spotlight.
PCT/CN2014/073042 2014-03-07 2014-03-07 Mr16 type led spotlight and dimming power source thereof WO2015131389A1 (en)

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CN110381644A (en) * 2019-08-21 2019-10-25 厦门亚锝电子科技有限公司 A kind of constant current LED drive circuit for integrating emergency lighting
CN114364085A (en) * 2021-09-28 2022-04-15 浙江沪乐电气设备制造有限公司 LED navigation light control system and light source detection early warning method
CN114364085B (en) * 2021-09-28 2023-08-29 浙江沪乐电气设备制造有限公司 LED navigation lamp control system and light source detection early warning method

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