CN210491276U - LED drive circuit capable of running stably and lamp using LED drive circuit - Google Patents
LED drive circuit capable of running stably and lamp using LED drive circuit Download PDFInfo
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- CN210491276U CN210491276U CN201921198309.0U CN201921198309U CN210491276U CN 210491276 U CN210491276 U CN 210491276U CN 201921198309 U CN201921198309 U CN 201921198309U CN 210491276 U CN210491276 U CN 210491276U
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Abstract
The utility model discloses a LED drive circuit of steady operation and use its lamps and lanterns, include with external power source electric connection and can be to the power module of external power source processing, switch drive module and bleeder switch module, the output of power module passes through switch drive module drive outside LED part, the control end of switch drive module receives external control signal in order to control the operation of switch drive module according to control signal, the input of bleeder switch module and the output electric connection of power module, the output ground connection of bleeder switch module, the control end of bleeder switch module receives external control signal to control the operation of bleeder switch module, thereby the output voltage of the output of control power module; the overstock on the reduction switch drive module, the heating that reduces switch drive module prevents it and damages, makes it more durable, also does benefit to the control of mixing of colors of adjusting luminance simultaneously for LED drive circuit steady operation.
Description
Technical Field
The utility model relates to the field of lighting, especially LED drive circuit.
Background
According to the traditional LED driving circuit, a constant-current constant-voltage chip can be used for processing a power supply, the constant-current constant-voltage chip supplies power to the LED lamp string through the switch tube, the constant-current constant-voltage chip outputs constant voltage, and when the voltage required by the load of the LED lamp string is far lower than the voltage output by the constant-current constant-voltage chip, the switch tube is seriously accumulated, so that the heat is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a reasonable LED drive circuit who adjusts output voltage with steady operation and use its lamps and lanterns.
The utility model adopts the technical proposal that:
an LED drive circuit that operates stably, comprising:
the power supply module is electrically connected with an external power supply and can process the external power supply;
the output end of the power supply module drives the external LED component through the switch driving module, and the control end of the switch driving module receives an external control signal to control the switch driving module to operate according to the control signal;
the input of bleeder switch module and power module's output electric connection, the output ground connection of bleeder switch module, the control end of bleeder switch module receives external control signal and controls the operation of bleeder switch module to adjust the output voltage of power module's output.
The control module can output a control signal to control the operation of the switch driving module and the bleeder switch module.
The switch driving module comprises a first switch driving module and a second switch driving module, the LED component comprises a first LED unit and a second LED unit which have different color temperatures, the output end of the power supply module drives the first LED unit through the first switch driving module, the output end of the power supply module drives the second LED unit through the second switch driving module, and the control module is respectively electrically connected with the control end of the first switch driving module and the control end of the second switch driving module and can control the conduction duty ratio of the first switch driving module and the second switch driving module.
The power supply module is an adjustable constant current output chip, and the control module is electrically connected with the adjustable constant current output chip to output a PWM signal to control the adjustable constant current output chip to adjust the output current.
The control module comprises a wireless transmission unit capable of receiving an external control signal and a main control unit electrically connected with the wireless transmission unit, and the main control unit can output a control signal to control the operation of the switch driving module and the bleeder switch module.
The control module is connected with the control end of the bleeder switch module so as to control the operation of the bleeder switch module, the control end of the switch driving module is electrically connected with the bleeder switch module, and the control module controls the operation of the switch driving module through the bleeder switch module.
The bleeder switch module comprises a switch tube Q1 and a resistor R2, a control electrode of the switch tube Q1 is electrically connected with the control module, an input electrode of the switch tube Q1 is electrically connected with one end of the resistor R2 and a control end of the switch driving module respectively, an output electrode of the switch tube Q1 is grounded, and an output end of the power supply module is electrically connected with the other end of the resistor R2.
The switch driving module comprises a diode D6, a switch tube Q2, a voltage regulator tube Q7, a resistor R3 and a switch tube Q3;
the anode of the diode D6 is electrically connected with the input electrode of the switch tube Q1, and the cathode of the diode Q6 is electrically connected with the control electrode of the switch tube Q2;
the input electrode of the switching tube Q2 is electrically connected with the negative electrode of the voltage regulator tube Q7, one end of the resistor R3 and the control electrode of the switching tube Q3 respectively;
the output end of the power supply module is electrically connected with the other end of the resistor R3;
the output electrode of the switch tube Q3 and the anode of the voltage regulator tube Q7 are both grounded.
A lamp comprises an LED driving circuit and an LED component which stably operate, and an output end of a power supply module drives the LED component through a switch driving module.
One of the above technical solutions has at least one of the following advantages or beneficial effects:
the utility model discloses LED drive circuit, the power module of constant voltage passes through switch drive module drive LED part operation, and the output of bleeder switch module and power module is connected, the load when the LED part is unmatched with the output voltage of power module output, the threshold value that control signal control bleeder switch module switched on, can reduce the supply voltage of power module's output, thereby make the load of LED part and the output voltage phase-match of power module output, thereby reduce the overstock on the switch drive module, reduce generating heat of switch drive module, prevent its damage, make it more durable, also do benefit to the control of the mixing of colors of adjusting luminance simultaneously, make LED drive circuit steady operation.
Furthermore, the control end of the switch driving module is electrically connected with the bleeder switch module, the control module controls the switch driving module to operate through the bleeder switch module, and the on-off operation of the switch driving module at different voltage differences can be controlled under the condition that the constant-current power supply module drives the LED component to operate through the switch driving module.
The utility model also discloses a lamps and lanterns uses foretell LED drive circuit to drive the LED part, for the suitable voltage of LED part configuration, reduces switch drive module and generates heat and make circuit steady operation.
Drawings
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of the LED driving circuit of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, an LED driving circuit for stable operation includes:
the power supply module 1 is electrically connected with an external power supply and can process the external power supply;
the output end of the power supply module 1 drives the external LED component 4 through the switch driving module 2, and the control end of the switch driving module 2 receives an external control signal to control the switch driving module 2 to operate according to the control signal;
the bleeder switch module 3, the input of bleeder switch module 3 and the output electric connection of power module 1, the output ground connection of bleeder switch module 3, the control end of bleeder switch module 3 receives external control signal and controls the operation of bleeder switch module 3 to adjust the output voltage of the output of power module 1.
The power module 1 of constant voltage passes through the operation of switch drive module 2 drive LED part, and the bleeder switch module 3 is connected with power module 1's output, load when LED part 4 does not match with the output voltage of power module 1 output, the threshold value that control signal control bleeder switch module 3 switched on, can draw down the power supply voltage of power module 1's output, thereby make the output voltage phase-match of LED part 4's load and power module 1 output, thereby reduce the backlog on switch drive module 2, reduce generating heat of switch drive module 2, prevent its damage, make it more durable, also do benefit to the control of mixing of colors of adjusting luminance simultaneously, make LED drive circuit steady operation.
The control signal input to the switch driving module 2 and the control signal input to the bleeding switch module 3 may be from different control terminals, and in some embodiments, the control module 5 is further included, the control module 5 can output a control signal to control the operation of the switch driving module 2 and the bleeding switch module 3, and can be connected to the switch driving module 2 and the bleeding switch module 3 through different ports to output corresponding control signals for control.
In some embodiments, the control module 5 includes a wireless transmission unit 51 capable of receiving an external control signal and a main control unit 52 electrically connected to the wireless transmission unit 51, the main control unit 52 is capable of outputting a control signal to control the operation of the switch driving module 2 and the bleeding switch module 3, where the main control unit 52 may be an MCU or a CPU chip with a PWM modulation output function, and the wireless transmission unit 51 may be a 2.4G module or an infrared radio frequency module, etc. so as to receive the external control signal to control the switch driving module 2 and the bleeding switch module 3 through the main control unit 52.
In some embodiments, the power supply module 1 is an adjustable constant current output chip, the control module 5 is electrically connected to the adjustable constant current output chip to output a PWM signal to control the adjustable constant current output chip to adjust the output current, and the control module 5 controls the adjustable constant current output chip to output different currents and adjusts the light of the LED component 4 in cooperation with controlling the on-threshold of the switch driving module 2.
In some embodiments, the switch driving module 2 includes a first switch driving module 21 and a second switch driving module 22, the LED component 4 includes a first LED unit 41 and a second LED unit 42 with different color temperatures, the output terminal of the power supply module 1 drives the first LED unit 41 through the first switch driving module 21, the output terminal of the power supply module 1 drives the second LED unit 42 through the second switch driving module 22, and the control module 4 is electrically connected to the control terminal of the first switch driving module 21 and the control terminal of the second switch driving module 22 respectively and can control the on duty ratios of the first switch driving module 21 and the second switch driving module 22.
By controlling the on duty ratios of the first switch driving module 21 and the second switch driving module 22, the on time lengths of the first LED unit 41 and the second LED unit 42 are changed, so as to adjust the color temperature.
In some embodiments, the control module 5 is connected to the control end of the bleeder switch module 3 to control the operation of the bleeder switch module 3, the control end of the switch driving module 2 is electrically connected to the bleeder switch module 3, and the control module 5 controls the operation of the switch driving module 2 through the bleeder switch module 3.
When the power supply module of constant current drives the LED component to operate through the switch driving module, the situation that the control module 5 and the switch driving module 2 are not grounded, the switch driving module 2 is connected in a fluctuating state and cannot accurately control the operation of the switch driving module 2 can exist, furthermore, the control end of the switch driving module is electrically connected with the bleeder switch module, the control module controls the switch driving module to operate through the bleeder switch module, and the on-off operation of the switch driving module at different voltage differences can be controlled.
Here, when the control module 5 controls the on-off of the bleeder switch module 3, the high-low level change is also generated, and the control module 5 can output a control signal to simultaneously control the operation of the bleeder switch module 3 and the switch driving module 2, and can be used for adjusting the on-off of the control switch driving module 2.
Correspondingly, in the case that the first switch driving module 21 and the second switch driving module 22 are provided, the bleeding switch module 3 is also correspondingly provided with a first bleeding switch module 31 and a second bleeding switch module 32, and the control module 5 controls the first switch driving module 21 and the second switch driving module 22 through the first bleeding switch module 31 and the second bleeding switch module 32, respectively.
The bleeder switch module 3 may include a switching tube Q1 and a resistor R2, a control electrode of the switching tube Q1 is electrically connected to the control module 5, an input electrode of the switching tube Q1 is electrically connected to one end of the resistor R2 and a control end of the switch driving module 2, an output electrode of the switching tube Q1 is grounded, and an output end of the power supply module 1 is electrically connected to the other end of the resistor R2.
The control module 5 controls the switching tube Q1 to be turned on, and the current flows through the resistor R2 to form a voltage drop, so as to adjust the voltage output by the power supply module 1, and the variation of the high and low levels generated here can form a control signal to be input into the switch driving module 2, so as to implement synchronous control.
The above first and second bleed switch modules 31, 32 may each take a similar configuration.
The switch driving module 2 comprises a diode D6, a switching tube Q2, a voltage regulator tube Q7, a resistor R3 and a switching tube Q3;
the anode of the diode D6 is electrically connected with the input electrode of the switching tube Q1, and the cathode of the diode Q6 is electrically connected with the control electrode of the switching tube Q2;
the input electrode of the switch tube Q2 is electrically connected with the negative electrode of the voltage regulator tube Q7, one end of the resistor R3 and the control electrode of the switch tube Q3 respectively;
the output end of the power supply module 1 is electrically connected with the other end of the resistor R3;
the output electrode of the switch tube Q3 and the anode of the regulator tube Q7 are both grounded, and the ground is a signal ground here.
The first switch driving module and the second switch driving module can adopt similar structures.
The switching tubes Q1, Q2 and Q3, and Q4, Q5 and Q6 in fig. 1 can be replaced by corresponding types selected from a triode and a MOS transistor, and a circuit for driving the switching tubes to operate is correspondingly adapted.
The utility model discloses a concrete embodiment still discloses a lamps and lanterns, including the LED drive circuit and the LED part 4 of the steady operation that any above-mentioned embodiment discloses, power module 1's output passes through switch drive module 2 drive LED part 4.
And appropriate voltage is configured for the LED component, and the heat generation of the switch driving module 2 is reduced, so that the circuit operates stably.
It is readily understood by those skilled in the art that the above-described preferred modes can be freely combined and superimposed without conflict.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. An LED drive circuit capable of operating stably, comprising:
the power supply module is electrically connected with an external power supply and can process the external power supply;
the output end of the power supply module drives the external LED component through the switch driving module, and the control end of the switch driving module receives an external control signal to control the switch driving module to operate according to the control signal;
the input of bleeder switch module and power module's output electric connection, the output ground connection of bleeder switch module, the control end of bleeder switch module receives external control signal and controls the operation of bleeder switch module to adjust the output voltage of power module's output.
2. The stably operating LED driving circuit according to claim 1, wherein:
the control module can output a control signal to control the operation of the switch driving module and the bleeder switch module.
3. The stably operating LED driving circuit according to claim 2, wherein:
the switch driving module comprises a first switch driving module and a second switch driving module, the LED component comprises a first LED unit and a second LED unit which have different color temperatures, the output end of the power supply module drives the first LED unit through the first switch driving module, the output end of the power supply module drives the second LED unit through the second switch driving module, and the control module is respectively electrically connected with the control end of the first switch driving module and the control end of the second switch driving module and can control the conduction duty ratio of the first switch driving module and the second switch driving module.
4. The stably operating LED driving circuit according to claim 2, wherein:
the power supply module is an adjustable constant current output chip, and the control module is electrically connected with the adjustable constant current output chip to output a PWM signal to control the adjustable constant current output chip to adjust the output current.
5. The stably operating LED driving circuit according to claim 2, wherein:
the control module comprises a wireless transmission unit capable of receiving an external control signal and a main control unit electrically connected with the wireless transmission unit, and the main control unit can output a control signal to control the operation of the switch driving module and the bleeder switch module.
6. The stably operating LED driving circuit according to claim 2, wherein:
the control module is connected with the control end of the bleeder switch module so as to control the operation of the bleeder switch module, the control end of the switch driving module is electrically connected with the bleeder switch module, and the control module controls the operation of the switch driving module through the bleeder switch module.
7. The stably operating LED driving circuit according to claim 6, wherein:
the bleeder switch module comprises a switch tube Q1 and a resistor R2, a control electrode of the switch tube Q1 is electrically connected with the control module, an input electrode of the switch tube Q1 is electrically connected with one end of the resistor R2 and a control end of the switch driving module respectively, an output electrode of the switch tube Q1 is grounded, and an output end of the power supply module is electrically connected with the other end of the resistor R2.
8. The stably operating LED driving circuit according to claim 7, wherein:
the switch driving module comprises a diode D6, a switch tube Q2, a voltage regulator tube Q7, a resistor R3 and a switch tube Q3;
the anode of the diode D6 is electrically connected with the input electrode of the switch tube Q1, and the cathode of the diode Q6 is electrically connected with the control electrode of the switch tube Q2;
the input electrode of the switching tube Q2 is electrically connected with the negative electrode of the voltage regulator tube Q7, one end of the resistor R3 and the control electrode of the switching tube Q3 respectively;
the output end of the power supply module is electrically connected with the other end of the resistor R3;
the output electrode of the switch tube Q3 and the anode of the voltage regulator tube Q7 are both grounded.
9. A light fixture, characterized by: the LED driving circuit comprises the LED driving circuit with stable operation and an LED component as claimed in any one of claims 1 to 8, wherein the output end of the power supply module drives the LED component through the switch driving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921198309.0U CN210491276U (en) | 2019-07-26 | 2019-07-26 | LED drive circuit capable of running stably and lamp using LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921198309.0U CN210491276U (en) | 2019-07-26 | 2019-07-26 | LED drive circuit capable of running stably and lamp using LED drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210491276U true CN210491276U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921198309.0U Active CN210491276U (en) | 2019-07-26 | 2019-07-26 | LED drive circuit capable of running stably and lamp using LED drive circuit |
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| Country | Link |
|---|---|
| CN (1) | CN210491276U (en) |
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- 2019-07-26 CN CN201921198309.0U patent/CN210491276U/en active Active
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