CN103841714A - LED dimming drive circuit - Google Patents
LED dimming drive circuit Download PDFInfo
- Publication number
- CN103841714A CN103841714A CN201210491298.1A CN201210491298A CN103841714A CN 103841714 A CN103841714 A CN 103841714A CN 201210491298 A CN201210491298 A CN 201210491298A CN 103841714 A CN103841714 A CN 103841714A
- Authority
- CN
- China
- Prior art keywords
- module
- output
- switch
- positive
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
An LED dimming drive circuit comprises a power module and a drive module used for sending out a drive signal. The LED dimming drive circuit further comprises a dimming control module, a switch module and a voltage regulating module. The power module is used for supply working power to the dimming control module, the switch module and the voltage regulating module. The dimming control module sends out of a dimming signal according to the drive signal sent by the drive module; after the switch module receives the dimming signal sent by the dimming control module, the switch module is switched on, and the voltage regulating module outputs a corresponding voltage value to an LED according to the dimming signal transmitted by the switch module. Namely, the LED connected with the voltage regulating module has different working voltages, and therefore regulation of multiple types of light intensity and illuminance of the LED can be realized.
Description
Technical field
The present invention relates to LED drive circuit, particularly relate to a kind of LED dimming driving circuit of many frequency modulated lights according to intensity adjustment function that have.
Background technology
LED is widely used as light source, has also occurred various LED drive circuits thereupon.Because LED self is harsher to operating voltage requirement, the too low LED operating current fluctuation that all can cause of overtension, so generally will adopt the type of drive of constant current voltage limiting to LED.Thereby during as current mode operating load, the electric current that flows through LED must guarantee in rated current at LED.Drive at the integrated integrated high-frequency model design LED of the many employings in the low-voltage place of direct current at present, but these type of drive are all firm power output, can not regulate power output, and then intensity of illumination can not regulate, bring serious inconvenience to user.
Summary of the invention
Based on this, provide a kind of LED dimming driving circuit of many frequency modulated lights according to intensity adjustment function that have.
A kind of LED dimming driving circuit, comprises power module and for sending the driver module that drives signal, also comprises dimming controlling module, switch module and voltage regulating module;
Described power module is used to described dimming controlling module, described switch module and described voltage regulating module that working power is provided, and described power module comprises the first output being connected with described voltage regulating module and the second output being connected with described dimming controlling module;
Described driver module comprises the output being connected with described dimming controlling module;
Described dimming controlling module comprises the calibration terminal of the power input being connected with described power module, the input being connected with described driver module, input reference voltage, the earth terminal of ground connection, the output of output dim signal;
Described switch module comprises the power input being connected with power module the first output, the input being connected with the output of described dimming controlling module and the output being connected with the input of described voltage regulating module;
The output of described voltage regulating module is for being connected with LED;
Wherein, described dimming controlling module is sent and is driven signal to send dim signal according to described driving, described switch module receives after the dim signal of described dimming controlling module, described switch module conducting, described voltage regulating module control is exported corresponding magnitude of voltage according to the dim signal of described switch module transmission to described LED.
In an embodiment, the output of described dimming controlling module comprises the first output, the second output of output the second dim signal and the 3rd output of output the 3rd dim signal of exporting the first dim signal therein;
Described switch module comprises one-level switch, secondary switch and three step switch; The power input of described one-level switch, described secondary switch and described three step switch is all connected with the first output of described power module, the input correspondence of the input of described one-level switch, the input of described secondary switch and described three step switch is connected with the first output, the second output and the 3rd output of described dimming controlling module, and the output of the output of described one-level switch, the output of described secondary switch and described three step switch is all connected with the input of described voltage regulating module;
Wherein, the driving signal that described dimming controlling module is sent according to described driver module is exported the first dim signal, the second dim signal and the 3rd dim signal successively; Described switch module receives after the first dim signal, the second dim signal and the 3rd dim signal of described dimming controlling module successively, the corresponding conducting of described one-level switch, described secondary switch and described three step switch; Described voltage regulating module is exported the first voltage in the time of described one-level switch conduction, in the time of described secondary switch conducting, export second voltage, in the time of described three step switch conducting, export tertiary voltage, in the time that described switch module does not have output signal, described voltage regulating module output the 4th voltage; Described dimming controlling module, driving under the driving of signal, can only be exported the one in the first dim signal, the second dim signal and the 3rd dim signal at every turn.
In an embodiment, described power module comprises rectifier bridge D1, electrochemical capacitor C1, voltage stabilizing didoe D2, inductance L 1, electrochemical capacitor C2 and source of stable pressure chip 7805 therein;
Described rectifier bridge D1 input is used for being connected with AC power, the first output that the output of described rectifier bridge D1 is described power module, the earth terminal ground connection of described rectifier bridge D1;
Described electrochemical capacitor C1 and described voltage stabilizing didoe D2 are parallel between the output and ground of described rectifier bridge D1, and the negative pole of described voltage stabilizing didoe D2 is connected with the output of described rectifier bridge D1;
Described inductance L 1 and described electrochemical capacitor C2 are series between the output and ground of described rectifier bridge D1, described inductance L 1 is connected with the input of described source of stable pressure chip 7805 with the link after described electrochemical capacitor C2 series connection, the earth terminal ground connection of described source of stable pressure chip 7805, the second output that the output of described source of stable pressure chip 7805 is described power module;
Described power module also comprises filter capacitor C7 and filter capacitor C8, described filter capacitor C7 is parallel between the input and earth terminal of described source of stable pressure chip 7805, and described filter capacitor C8 is parallel between the output and ground of described source of stable pressure chip 7805.
Therein in an embodiment, described driver module comprises touch-switch SW and divider resistance R10, described touch-switch SW one end ground connection, the other end of described touch-switch SW is connected with one end of described divider resistance R10, the output that the other end of described divider resistance R10 is described driver module.
Therein in an embodiment, described dimming controlling module comprises single-chip microcomputer and divider resistance R9, described divider resistance R9 one end is connected with the second output of described power module, the other end is connected with the PA7 end of described single-chip microcomputer, the power input of described single-chip microcomputer is connected with the second output of described power module, the PA6 end of described single-chip microcomputer is for input reference voltage, and the PA0 end of described single-chip microcomputer, PA2 end and PA5 hold corresponding output the first dim signal, the second dim signal and the 3rd dim signal;
The input that the tie point of the PA7 end of described divider resistance R9 and described single-chip microcomputer is described dimming controlling module, power input, PA6 end, VSS end, PA0 end, PA2 end and the PA5 of described single-chip microcomputer corresponds to voltage input end, calibration terminal, earth terminal, the first output, the second output and the 3rd output of described dimming controlling module.
In an embodiment, also comprise the reference voltage module being connected with the calibration terminal of described dimming controlling module therein, described reference voltage module comprises voltage stabilizing chip U3, divider resistance R8 and filter capacitor C9;
The reference edge input reference voltage of described voltage stabilizing chip U3, the reference edge of described voltage stabilizing chip U3 is connected with the negative electrode of described voltage stabilizing chip U3, the plus earth of described voltage stabilizing chip U3, described filter capacitor C9 is parallel between the negative electrode and anode of described voltage stabilizing chip U3, one end of described divider resistance R8 is connected with the negative electrode of described voltage stabilizing chip U3, and the other end of described divider resistance R8 is connected with the calibration terminal of described dimming controlling module.
Therein in an embodiment, the input of described voltage regulating module comprises one-level input, secondary input and three grades of inputs, and the one-level input of described voltage regulating module, secondary input and three grades of inputs are corresponding with the output of the output of described one-level switch, described secondary switch with the output of described three step switch is corresponding is connected;
Described voltage regulating module comprises diode D3, diode D4, diode D5 and diode D6;
Described diode D3, described diode D4, described diode D5 and described diode D6 are series between first output and the positive pole of LED of described power module; The positive pole of described diode D3 is connected with the first output of described power module, and the negative pole of described diode D6 is connected with the positive pole of LED;
The anodal common port of the negative pole of described diode D3 and described diode D4 is described one-level input;
The anodal common port of the negative pole of described diode D4 and described diode D5 is described secondary input;
The anodal common port of the negative pole of described diode D5 and described diode D6 is described three grades of inputs.
In an embodiment, described one-level switch comprises positive-negative-positive triode Q1, NPN type triode Q4, divider resistance R2, divider resistance R5 and filter capacitor C3 therein;
One end of described divider resistance R5 is connected with the first output of described dimming controlling module, and the other end of described divider resistance R5 is connected with the base stage of described NPN type triode Q4; The grounded emitter of described NPN type triode Q4, described divider resistance R2 is series between the collector electrode of described NPN type triode Q4 and the base stage of described positive-negative-positive triode Q1, the collector electrode of described positive-negative-positive triode Q1 is connected with the one-level input of described voltage regulating module, the emitter of described positive-negative-positive triode Q1 is connected with the first output of described power module, described filter capacitor C3 one end is connected with the emitter of described positive-negative-positive triode Q1, described filter capacitor C3 other end ground connection.
In an embodiment, described secondary switch comprises positive-negative-positive triode Q2, NPN type triode Q5, divider resistance R3, divider resistance R6 and filter capacitor C4 therein;
One end of described divider resistance R6 is connected with the second output of described dimming controlling module, and the other end of described divider resistance R6 is connected with the base stage of described NPN type triode Q5; The grounded emitter of described NPN type triode Q5, described divider resistance R3 is series between the collector electrode of described NPN type triode Q5 and the base stage of described positive-negative-positive triode Q2, the collector electrode of described positive-negative-positive triode Q2 is connected with the secondary input of described voltage regulating module, the emitter of described positive-negative-positive triode Q2 is connected with the first output of described power module, described filter capacitor C4 one end is connected with the emitter of described positive-negative-positive triode Q2, described filter capacitor C4 other end ground connection.
In an embodiment, described three step switch comprises positive-negative-positive triode Q3, NPN type triode Q6, divider resistance R4, divider resistance R7 and filter capacitor C5 therein;
One end of described divider resistance R7 is connected with the 3rd output of described dimming controlling module, and the other end of described divider resistance R7 is connected with the base stage of described NPN type triode Q6; The grounded emitter of described NPN type triode Q6, described divider resistance R4 is series between the collector electrode of described NPN type triode Q6 and the base stage of described positive-negative-positive triode Q3, the collector electrode of described positive-negative-positive triode Q3 is connected with three grades of inputs of described voltage regulating module, the emitter of described positive-negative-positive triode Q3 is connected with the first output of described power module, described filter capacitor C5 one end is connected with the emitter of described positive-negative-positive triode Q3, described filter capacitor C5 other end ground connection.
Dimming controlling module in above-mentioned LED dimming driving circuit is according to the driving signal output dim signal of driver module, and voltage regulating module is according to the corresponding voltage varying in size of exporting of the dim signal receiving.LED receives after the magnitudes of voltage of different sizes, luminosity difference, thereby can regulate the luminosity of LED.
Concrete, dimming controlling module is exported the first dim signal, the second dim signal and the 3rd dim signal according to the driving signal of driver module, and then is transferred to voltage regulating module by one-level switch, secondary switch and the three step switch correspondence of switch module.When voltage regulating module receives the first dim signal, export the first voltage, when voltage regulating module receives the second dim signal, export second voltage, when voltage regulating module receives the 3rd dim signal, export tertiary voltage.In the time that switch module does not receive light modulation, voltage regulating module output the 4th voltage.The LED connecting from voltage regulating module has multiple different operating voltage, thereby can realize the multiple light intensity illumination adjusting to LED.
Accompanying drawing explanation
Fig. 1 is the module map of LED light adjusting circuit;
Fig. 2 is the schematic diagram of LED light adjusting circuit.
Embodiment
As shown in Figure 1, be the module map of LED light adjusting circuit.
A kind of LED dimming driving circuit, comprises power module 101 and for sending the driver module 103 that drives signal, also comprises dimming controlling module 105, switch module 107 and voltage regulating module 109.
Dimming controlling module 105 comprises the calibration terminal of the power input being connected with power module 101, the input being connected with driver module 103, input reference voltage, the earth terminal of ground connection, the output of output dim signal.
Described switch module 107 comprises the power input being connected with power module the first output, the input being connected with the output of described dimming controlling module 105 and the output being connected with the input of described voltage regulating module 109.
The output of described voltage regulating module 109 is for being connected with LED.
Wherein, described dimming controlling module 105 is sent and is driven signal to send dim signal according to described driving, described switch module 107 receives after the dim signal of described dimming controlling module, described switch module 107 conductings, described voltage regulating module 109 is controlled the dim signal transmitting according to described switch module 107 and is exported corresponding magnitude of voltage to described LED.
Particularly, the output of dimming controlling module 105 comprises the first output, the second output of output the second dim signal and the 3rd output of output the 3rd dim signal of the first dim signal.
The output of voltage regulating module 109 is for being connected with LED.
Wherein, the driving signal that dimming controlling module 105 is sent according to driver module 103 is exported the first dim signal, the second dim signal and the 3rd dim signal successively; Switch module 107 receives after the first dim signal, the second dim signal and the 3rd dim signal of dimming controlling module 105 successively, one-level switch 1071, secondary switch 1072 and the corresponding conducting of three step switch 1073; Voltage regulating module 109 is exported the first voltage in the time of 1071 conducting of one-level switch, in the time of secondary switch 1072 conducting, export second voltage, in the time of three step switch 1072 conducting, export tertiary voltage, in the time that switch module 107 does not have output signal, voltage regulating module 109 is exported the 4th voltage; Dimming controlling module 105, driving under the driving of signal, can only be exported the one in the first dim signal, the second dim signal and the 3rd dim signal at every turn.
Dimming controlling module 105 is exported dim signal after receiving and driving signal successively.Receive for the first time while driving signal, dimming controlling module 105 is exported the first dim signal.Corresponding, receiving for the second time while driving signal, dimming controlling module 105 is exported the second dim signal.Receive for the third time while driving signal, dimming controlling module 105 is exported the 3rd dim signal.Receive for the 4th time while driving signal, dimming controlling module 105 resets, and dimming controlling module 105 is not exported dim signal.Wherein, dimming controlling module 105 receives while driving signal, can only export three kinds of one in dim signal, simultaneously two kinds and two or more dim signals.
One-level switch 1071, secondary switch 1072 and three step switch 1073 conducting in the time receiving corresponding dim signal in switch module 107.Thereby voltage regulating module 109 is exported the first voltage in the time of 1071 conducting of one-level switch, voltage regulating module 109 is exported second voltage in the time of secondary switch 1072 conducting, and voltage regulating module 109 is exported tertiary voltage in the time of three step switch 1073 conducting.In the time that switch module 107 does not have output signal, voltage regulating module 109 is exported the 4th voltage.Therefore, the LED being connected with voltage regulating module 109 outputs has four kinds of operating voltages, and LED has four kinds of adjustable intensities of illumination.
Incorporated by reference to Fig. 2.
Rectifier bridge D1 input is for being connected with AC power, and the output of rectifier bridge D1 is the first output of power module 101, the earth terminal ground connection of rectifier bridge D1.
Electrochemical capacitor C1 and voltage stabilizing didoe D2 are parallel between the output and ground of rectifier bridge D1, and the negative pole of voltage stabilizing didoe D2 is connected with the output of rectifier bridge D1.
Inductance L 1 and electrochemical capacitor C2 are series between the output and ground of rectifier bridge D1, inductance L 1 is connected with the input of source of stable pressure chip 7805 with the link after electrochemical capacitor C2 series connection, the earth terminal ground connection of source of stable pressure chip 7805, the output of source of stable pressure chip 7805 is the second output of power module 101.
Rectifier bridge D1 comprises four ports such as port one, port 2, port 3 and port 4.Wherein port one is connected with the both positive and negative polarity of power supply respectively with port 3, port 4 ground connection, and port 2 is output.AC power is exported the direct voltage of 12V after via rectifier bridge D1 rectification, electrochemical capacitor C1 filtering and voltage stabilizing didoe D2 voltage stabilizing.
Touch-switch SW electronic switch, presses gently shift knob and just can make switch connection when use, in the time unclamping hand, switch disconnects.
Dimming controlling module 105 comprises single-chip microcomputer and divider resistance R9, divider resistance R9 one end is connected with the second output of power module 101, the other end is connected with the PA7 end of single-chip microcomputer, the power input of single-chip microcomputer is connected with the second output of power module 101, the PA6 end of single-chip microcomputer is for input reference voltage, and the PA0 end of single-chip microcomputer, PA2 end and PA5 hold corresponding output the first dim signal, the second dim signal and the 3rd dim signal.
The tie point of the PA7 end of divider resistance R9 and single-chip microcomputer is the input of dimming controlling module 105, and power input, PA6 end, VSS end, PA0 end, PA2 end and the PA5 of single-chip microcomputer corresponds to voltage input end, calibration terminal, earth terminal, the first output, the second output and the 3rd output of dimming controlling module 105.
Single-chip microcomputer model is HT66F03C.
LED dimming driving circuit also comprises the reference voltage module 111 being connected with the calibration terminal of dimming controlling module 105, and reference voltage module 111 comprises voltage stabilizing chip U3, divider resistance R8 and filter capacitor C9.
The reference edge input reference voltage of voltage stabilizing chip U3, the reference edge of voltage stabilizing chip U3 is connected with the negative electrode of voltage stabilizing chip U3, the plus earth of voltage stabilizing chip U3, filter capacitor C9 is parallel between the negative electrode and anode of voltage stabilizing chip U3, one end of divider resistance R8 is connected with the negative electrode of voltage stabilizing chip U3, and the other end of divider resistance R8 is connected with the calibration terminal of dimming controlling module 105.
The input of voltage regulating module 109 comprises one-level input, secondary input and three grades of inputs, the one-level input of voltage regulating module 109, secondary input and three grades of inputs corresponding output, the output of secondary switch with one-level switch and the output of three step switch is corresponding is connected.
Diode D3, diode D4, diode D5 and diode D6 are series between first output and the positive pole of LED of power module 101; The positive pole of diode D3 is connected with the first output of power module 101, and the negative pole of diode D6 is connected with the positive pole of LED.
The anodal common port of the negative pole of diode D3 and diode D4 is one-level input.
The anodal common port of the negative pole of diode D4 and diode D5 is secondary input.
The anodal common port of the negative pole of diode D5 and diode D6 is three grades of inputs.
One-level switch 1071 comprises positive-negative-positive triode Q1, NPN type triode Q4, divider resistance R2, divider resistance R5 and filter capacitor C3.
One end of described divider resistance R5 is connected with the first output of described dimming controlling module 105, the other end of described divider resistance R5 is connected with the base stage of described NPN type triode Q4, the grounded emitter of NPN type triode Q4, divider resistance R2 is series between the collector electrode of NPN type triode Q4 and the base stage of positive-negative-positive triode Q1, the collector electrode of positive-negative-positive triode Q1 is connected with the one-level input of voltage regulating module 109, the emitter of positive-negative-positive triode Q1 is connected with the first output of power module 101, filter capacitor C3 one end is connected with the emitter of positive-negative-positive triode Q1, filter capacitor C3 other end ground connection.
One end of divider resistance R6 is connected with the second output of described dimming controlling module 105, the other end of described divider resistance R6 is connected with the base stage of described NPN type triode Q5, the grounded emitter of NPN type triode Q5, divider resistance R3 is series between the collector electrode of NPN type triode Q5 and the base stage of positive-negative-positive triode Q2, the collector electrode of positive-negative-positive triode Q2 is connected with the secondary input of voltage regulating module 109, the emitter of positive-negative-positive triode Q2 is connected with the first output of power module 101, filter capacitor C4 one end is connected with the emitter of positive-negative-positive triode Q2, filter capacitor C4 other end ground connection.
Three step switch 1073 comprises positive-negative-positive triode Q3, NPN type triode Q6, divider resistance R4, divider resistance R7 and filter capacitor C5.
One end of divider resistance R7 is connected with the 3rd output of described dimming controlling module 105, the other end of described divider resistance R7 is connected with the base stage of described NPN type triode Q6, the grounded emitter of NPN type triode Q6, divider resistance R4 is series between the collector electrode of NPN type triode Q6 and the base stage of positive-negative-positive triode Q3, the collector electrode of positive-negative-positive triode Q3 is connected with three grades of inputs of voltage regulating module 109, the emitter of positive-negative-positive triode Q3 is connected with the first output of power module 101, filter capacitor C5 one end is connected with the emitter of positive-negative-positive triode Q3, filter capacitor C5 other end ground connection.
LED dimming driving circuit also comprises filter capacitor C6, and filter capacitor C6 one end is connected with the negative pole of diode D6, other end ground connection.
Based on above-mentioned all embodiment, the operation principle of LED dimming driving circuit is as follows:
The 12V direct voltage of the first output stable output of power module 101, the 5V direct voltage of the second output stable output.12V direct voltage is transferred to LED by voltage regulating module 109.5V direct voltage provides working power for dimming controlling module 105 and switch module 107.
In the time not pressing touch-switch SW, the single-chip microcomputer in dimming controlling module 105 does not receive driving signal, and therefore, single-chip microcomputer does not have output signal.One-level switch 1071, secondary switch 1072 and three step switch 1073 all not conductings in switch module 107.Now, be equivalent to the direct voltage of 12V directly via after the diode D3 in voltage regulating module 109, diode D4, diode D5 and diode D6 step-down, the voltage of supplying with LED is 9.2V.Now, LED is in one grade of intensity of illumination.
In the time pressing touch-switch SW for the first time, the single-chip microcomputer in dimming controlling module 105 receives driving signal, PA0 end output high level, the PA2 end of single-chip microcomputer and the PA5 end output low level of single-chip microcomputer.Therefore, NPN type triode Q4 conducting, NPN type triode Q5 and NPN type triode Q6 cut-off.The base stage of positive-negative-positive triode Q1 is connected with the collector electrode of NPN type triode Q4 by divider resistance R2, and in the time of NPN type triode Q4 conducting, the collector electrode output low level of NPN type triode Q4, so positive-negative-positive triode Q1 conducting.Be 12V direct voltage via diode D4, diode D5 and diode D6 step-down after, supplying with the voltage of LED is 9.8V.Now, LED is in one grade of intensity of illumination.
In the time pressing touch-switch SW for the second time, the single-chip microcomputer in dimming controlling module 105 receives driving signal, PA2 end output high level, the PA0 end of single-chip microcomputer and the PA5 end output low level of single-chip microcomputer.Therefore, NPN type triode Q5 conducting, NPN type triode Q4 and NPN type triode Q6 cut-off.The base stage of positive-negative-positive triode Q2 is connected with the collector electrode of NPN type triode Q5 by divider resistance R3, and in the time of NPN type triode Q5 conducting, the collector electrode output low level of NPN type triode Q5, so positive-negative-positive triode Q2 conducting.Be 12V direct voltage via diode D5 and diode D6 step-down after, supplying with the voltage of LED is 10.4V.Now, LED is in one grade of intensity of illumination.
In the time pressing touch-switch SW for the third time, the single-chip microcomputer in dimming controlling module 105 receives driving signal, PA5 end output high level, the PA0 end of single-chip microcomputer and the PA2 end output low level of single-chip microcomputer.Therefore, NPN type triode Q6 conducting, NPN type triode Q4 and NPN type triode Q5 cut-off.The base stage of positive-negative-positive triode Q3 is connected with the collector electrode of NPN type triode Q6 by divider resistance R4, and in the time of NPN type triode Q6 conducting, the collector electrode output low level of NPN type triode Q6, so positive-negative-positive triode Q3 conducting.Be 12V direct voltage via diode D6 step-down after, supplying with the voltage of LED is 11.3V.Now, LED is in one grade of intensity of illumination.
Therefore,, in the time pressing touch-switch SW, LED dimming driving circuit regulates the intensity of illumination of LED always according to above-mentioned four kinds of cycle of states.
In the present embodiment, can, by increasing the diode number in the switch sum of series voltage regulating module 109 in switch module 107, regulate to reach more multiextent intensity of illumination.For example, the increase level Four switch in switch module 107 connects a diode after diode D6 again in voltage regulating module 109.Now, LED dimming driving circuit just has intensity of illumination adjusting in 5.
Dimming controlling module 105 in above-mentioned LED dimming driving circuit is according to the driving signal output dim signal of driver module 103, and voltage regulating module 109 is according to the corresponding voltage varying in size of exporting of the dim signal receiving.LED receives after the magnitudes of voltage of different sizes, luminosity difference, thereby can regulate the luminosity of LED.
Concrete, dimming controlling module 105 is exported the first dim signal, the second dim signal and the 3rd dim signal according to the driving signal of driver module 103, and then is transferred to voltage regulating module 109 by one-level switch 1071, secondary switch 1072 and three step switch 1073 correspondences of switch module 107.When voltage regulating module 109 receives the first dim signal, export the first voltage, when voltage regulating module 109 receives the second dim signal, export second voltage, when voltage regulating module 109 receives the 3rd dim signal, export tertiary voltage.In the time that switch module 107 does not receive light modulation, voltage regulating module 109 is exported the 4th voltage.The LED connecting from voltage regulating module 109 has multiple different operating voltage, thereby can realize the multiple light intensity illumination adjusting to LED.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a LED dimming driving circuit, comprises power module and for sending the driver module that drives signal, it is characterized in that, also comprises dimming controlling module, switch module and voltage regulating module;
Described power module is used to described dimming controlling module, described switch module and described voltage regulating module that working power is provided, and described power module comprises the first output being connected with described voltage regulating module and the second output being connected with described dimming controlling module;
Described driver module comprises the output being connected with described dimming controlling module;
Described dimming controlling module comprises the calibration terminal of the power input being connected with described power module, the input being connected with described driver module, input reference voltage, the earth terminal of ground connection, the output of output dim signal;
Described switch module comprises the power input being connected with power module the first output, the input being connected with the output of described dimming controlling module and the output being connected with the input of described voltage regulating module;
The output of described voltage regulating module is for being connected with LED;
Wherein, described dimming controlling module is sent and is driven signal to send dim signal according to described driving, described switch module receives after the dim signal of described dimming controlling module, described switch module conducting, described voltage regulating module control is exported corresponding magnitude of voltage according to the dim signal of described switch module transmission to described LED.
2. LED dimming driving circuit according to claim 1, it is characterized in that, the output of described dimming controlling module comprises the first output, the second output of output the second dim signal and the 3rd output of output the 3rd dim signal of exporting the first dim signal;
Described switch module comprises one-level switch, secondary switch and three step switch; The power input of described one-level switch, described secondary switch and described three step switch is all connected with the first output of described power module, the input correspondence of the input of described one-level switch, the input of described secondary switch and described three step switch is connected with the first output, the second output and the 3rd output of described dimming controlling module, and the output of the output of described one-level switch, the output of described secondary switch and described three step switch is all connected with the input of described voltage regulating module;
Wherein, the driving signal that described dimming controlling module is sent according to described driver module is exported the first dim signal, the second dim signal and the 3rd dim signal successively; Described switch module receives after the first dim signal, the second dim signal and the 3rd dim signal of described dimming controlling module successively, the corresponding conducting of described one-level switch, described secondary switch and described three step switch; Described voltage regulating module is exported the first voltage in the time of described one-level switch conduction, in the time of described secondary switch conducting, export second voltage, in the time of described three step switch conducting, export tertiary voltage, in the time that described switch module does not have output signal, described voltage regulating module output the 4th voltage; Described dimming controlling module, driving under the driving of signal, can only be exported the one in the first dim signal, the second dim signal and the 3rd dim signal at every turn.
3. LED dimming driving circuit according to claim 1, is characterized in that, described power module comprises rectifier bridge D1, electrochemical capacitor C1, voltage stabilizing didoe D2, inductance L 1, electrochemical capacitor C2 and source of stable pressure chip 7805;
Described rectifier bridge D1 input is used for being connected with AC power, the first output that the output of described rectifier bridge D1 is described power module, the earth terminal ground connection of described rectifier bridge D1;
Described electrochemical capacitor C1 and described voltage stabilizing didoe D2 are parallel between the output and ground of described rectifier bridge D1, and the negative pole of described voltage stabilizing didoe D2 is connected with the output of described rectifier bridge D1;
Described inductance L 1 and described electrochemical capacitor C2 are series between the output and ground of described rectifier bridge D1, described inductance L 1 is connected with the input of described source of stable pressure chip 7805 with the link after described electrochemical capacitor C2 series connection, the earth terminal ground connection of described source of stable pressure chip 7805, the second output that the output of described source of stable pressure chip 7805 is described power module;
Described power module also comprises filter capacitor C7 and filter capacitor C8, described filter capacitor C7 is parallel between the input and earth terminal of described source of stable pressure chip 7805, and described filter capacitor C8 is parallel between the output and ground of described source of stable pressure chip 7805.
4. LED dimming driving circuit according to claim 1, it is characterized in that, described driver module comprises touch-switch SW and divider resistance R10, described touch-switch SW one end ground connection, the other end of described touch-switch SW is connected with one end of described divider resistance R10, the output that the other end of described divider resistance R10 is described driver module.
5. LED dimming driving circuit according to claim 2, it is characterized in that, described dimming controlling module comprises single-chip microcomputer and divider resistance R9, described divider resistance R9 one end is connected with the second output of described power module, the other end is connected with the PA7 end of described single-chip microcomputer, the power input of described single-chip microcomputer is connected with the second output of described power module, the PA6 end of described single-chip microcomputer is for input reference voltage, and the PA0 end of described single-chip microcomputer, PA2 end and PA5 hold corresponding output the first dim signal, the second dim signal and the 3rd dim signal;
The input that the tie point of the PA7 end of described divider resistance R9 and described single-chip microcomputer is described dimming controlling module, power input, PA6 end, VSS end, PA0 end, PA2 end and the PA5 of described single-chip microcomputer corresponds to voltage input end, calibration terminal, earth terminal, the first output, the second output and the 3rd output of described dimming controlling module.
6. LED dimming driving circuit according to claim 1, is characterized in that, also comprises the reference voltage module being connected with the calibration terminal of described dimming controlling module, and described reference voltage module comprises voltage stabilizing chip U3, divider resistance R8 and filter capacitor C9;
The reference edge input reference voltage of described voltage stabilizing chip U3, the reference edge of described voltage stabilizing chip U3 is connected with the negative electrode of described voltage stabilizing chip U3, the plus earth of described voltage stabilizing chip U3, described filter capacitor C9 is parallel between the negative electrode and anode of described voltage stabilizing chip U3, one end of described divider resistance R8 is connected with the negative electrode of described voltage stabilizing chip U3, and the other end of described divider resistance R8 is connected with the calibration terminal of described dimming controlling module.
7. LED dimming driving circuit according to claim 2, it is characterized in that, the input of described voltage regulating module comprises one-level input, secondary input and three grades of inputs, and the one-level input of described voltage regulating module, secondary input and three grades of inputs are corresponding with the output of the output of described one-level switch, described secondary switch with the output of described three step switch is corresponding is connected;
Described voltage regulating module comprises diode D3, diode D4, diode D5 and diode D6;
Described diode D3, described diode D4, described diode D5 and described diode D6 are series between first output and the positive pole of LED of described power module; The positive pole of described diode D3 is connected with the first output of described power module, and the negative pole of described diode D6 is connected with the positive pole of LED;
The anodal common port of the negative pole of described diode D3 and described diode D4 is described one-level input;
The anodal common port of the negative pole of described diode D4 and described diode D5 is described secondary input;
The anodal common port of the negative pole of described diode D5 and described diode D6 is described three grades of inputs.
8. LED dimming driving circuit according to claim 2, is characterized in that, described one-level switch comprises positive-negative-positive triode Q1, NPN type triode Q4, divider resistance R2, divider resistance R5 and filter capacitor C3;
One end of described divider resistance R5 is connected with the first output of described dimming controlling module, and the other end of described divider resistance R5 is connected with the base stage of described NPN type triode Q4; The grounded emitter of described NPN type triode Q4, described divider resistance R2 is series between the collector electrode of described NPN type triode Q4 and the base stage of described positive-negative-positive triode Q1, the collector electrode of described positive-negative-positive triode Q1 is connected with the one-level input of described voltage regulating module, the emitter of described positive-negative-positive triode Q1 is connected with the first output of described power module, described filter capacitor C3 one end is connected with the emitter of described positive-negative-positive triode Q1, described filter capacitor C3 other end ground connection.
9. LED dimming driving circuit according to claim 2, is characterized in that, described secondary switch comprises positive-negative-positive triode Q2, NPN type triode Q5, divider resistance R3, divider resistance R6 and filter capacitor C4;
One end of described divider resistance R6 is connected with the second output of described dimming controlling module, and the other end of described divider resistance R6 is connected with the base stage of described NPN type triode Q5; The grounded emitter of described NPN type triode Q5, described divider resistance R3 is series between the collector electrode of described NPN type triode Q5 and the base stage of described positive-negative-positive triode Q2, the collector electrode of described positive-negative-positive triode Q2 is connected with the secondary input of described voltage regulating module, the emitter of described positive-negative-positive triode Q2 is connected with the first output of described power module, described filter capacitor C4 one end is connected with the emitter of described positive-negative-positive triode Q2, described filter capacitor C4 other end ground connection.
10. LED dimming driving circuit according to claim 2, is characterized in that, described three step switch comprises positive-negative-positive triode Q3, NPN type triode Q6, divider resistance R4, divider resistance R7 and filter capacitor C5;
One end of described divider resistance R7 is connected with the 3rd output of described dimming controlling module, and the other end of described divider resistance R7 is connected with the base stage of described NPN type triode Q6; The grounded emitter of described NPN type triode Q6, described divider resistance R4 is series between the collector electrode of described NPN type triode Q6 and the base stage of described positive-negative-positive triode Q3, the collector electrode of described positive-negative-positive triode Q3 is connected with three grades of inputs of described voltage regulating module, the emitter of described positive-negative-positive triode Q3 is connected with the first output of described power module, described filter capacitor C5 one end is connected with the emitter of described positive-negative-positive triode Q3, described filter capacitor C5 other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210491298.1A CN103841714B (en) | 2012-11-27 | 2012-11-27 | LED dimming driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210491298.1A CN103841714B (en) | 2012-11-27 | 2012-11-27 | LED dimming driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103841714A true CN103841714A (en) | 2014-06-04 |
| CN103841714B CN103841714B (en) | 2016-01-13 |
Family
ID=50804724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210491298.1A Active CN103841714B (en) | 2012-11-27 | 2012-11-27 | LED dimming driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103841714B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657916A (en) * | 2016-04-05 | 2016-06-08 | 成都市曼苗科技有限公司 | Energy-saving lamp module |
| CN107006094A (en) * | 2017-03-02 | 2017-08-01 | 深圳市豪恩光电照明股份有限公司 | LED lamp and LED luminance regulation circuit |
| CN112437516A (en) * | 2020-12-08 | 2021-03-02 | 宁波恒达高智能科技股份有限公司 | Digital timing dimmer control circuit |
| WO2022100328A1 (en) * | 2020-11-13 | 2022-05-19 | 南京苏曼等离子科技有限公司 | High-voltage electric field low-temperature plasma cold sterilization system circuit and apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980196Y (en) * | 2006-12-01 | 2007-11-21 | 盐城豪迈照明科技有限公司 | A three position light-tuning control device of fluorescent lamp |
| CN101827480A (en) * | 2010-04-30 | 2010-09-08 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN102480815A (en) * | 2010-11-23 | 2012-05-30 | 海洋王照明科技股份有限公司 | LED (light emitting diode) dimming drive circuit |
| CN102651930A (en) * | 2011-02-25 | 2012-08-29 | 海洋王照明科技股份有限公司 | LED (Light-Emitting Diode) dimming drive circuit |
| CN102769959A (en) * | 2011-05-06 | 2012-11-07 | 海洋王照明科技股份有限公司 | LED light-dimming driving circuit |
-
2012
- 2012-11-27 CN CN201210491298.1A patent/CN103841714B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980196Y (en) * | 2006-12-01 | 2007-11-21 | 盐城豪迈照明科技有限公司 | A three position light-tuning control device of fluorescent lamp |
| CN101827480A (en) * | 2010-04-30 | 2010-09-08 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN102480815A (en) * | 2010-11-23 | 2012-05-30 | 海洋王照明科技股份有限公司 | LED (light emitting diode) dimming drive circuit |
| CN102651930A (en) * | 2011-02-25 | 2012-08-29 | 海洋王照明科技股份有限公司 | LED (Light-Emitting Diode) dimming drive circuit |
| CN102769959A (en) * | 2011-05-06 | 2012-11-07 | 海洋王照明科技股份有限公司 | LED light-dimming driving circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657916A (en) * | 2016-04-05 | 2016-06-08 | 成都市曼苗科技有限公司 | Energy-saving lamp module |
| CN105657916B (en) * | 2016-04-05 | 2017-08-25 | 成都市曼苗科技有限公司 | One kind energy-conservation lamp module |
| CN107006094A (en) * | 2017-03-02 | 2017-08-01 | 深圳市豪恩光电照明股份有限公司 | LED lamp and LED luminance regulation circuit |
| WO2022100328A1 (en) * | 2020-11-13 | 2022-05-19 | 南京苏曼等离子科技有限公司 | High-voltage electric field low-temperature plasma cold sterilization system circuit and apparatus |
| CN112437516A (en) * | 2020-12-08 | 2021-03-02 | 宁波恒达高智能科技股份有限公司 | Digital timing dimmer control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103841714B (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104902653B (en) | A kind of LED constant pressures dimming power source and LED lamp light adjusting system | |
| CN101888730B (en) | Alternating current constant current source LED driving circuit | |
| CN103298221B (en) | Dimming circuit and method of LED (Light Emitting Diode) lighting lamp | |
| CN110099489B (en) | Driving circuit compatible with silicon controlled rectifier dimming and wireless dimming | |
| CN101636021A (en) | LED constant current driving circuit | |
| CN201813599U (en) | LED (Light-Emitting Diode) dimmer power | |
| CN102833917B (en) | LED constant-current control circuit and LED liquid crystal television | |
| CN205596389U (en) | Constant current AC drive circuit and TV set | |
| CN102014557A (en) | LED dimming power supply | |
| CN102647820A (en) | LED (light emitting diode) drive circuit | |
| CN209787523U (en) | LED drive circuit and LED lamp | |
| CN103841714B (en) | LED dimming driving circuit | |
| CN104780694B (en) | A kind of LED touch dimmers constant-current driving power supply | |
| CN107172752A (en) | A kind of wide electronic light modulator of compatible voltage range | |
| CN104994659B (en) | A kind of LED light adjusting circuits | |
| CN201042100Y (en) | Light-adjusting control signal transmission circuit for electronic light-adjusting rectifier | |
| CN103152939A (en) | Four-in-one light-dimming circuit of light-emitting diode (LED) power source | |
| CN104768271A (en) | Automatic dimming LED constant-current driving circuit | |
| CN207219090U (en) | A kind of wide electronic light modulator of compatible voltage range | |
| CN104661380B (en) | A kind of gamut adjusts electric current and corrects the LED drive circuit of dimming curve | |
| CN102958240A (en) | light source device and dimming control circuit thereof | |
| CN109379806A (en) | A kind of dimming driving circuit, light adjusting controller and LED lamp | |
| CN205611001U (en) | Linear constant current PWM optoelectronic isolation receiving terminal of high pressure | |
| CN204598401U (en) | A kind of LED touch dimmer power supply | |
| CN207083252U (en) | A kind of light adjusting circuit of LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |