CN205017630U - LED drive power supply adjusts luminance and turn -offs control circuit - Google Patents
LED drive power supply adjusts luminance and turn -offs control circuit Download PDFInfo
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- CN205017630U CN205017630U CN201520443345.4U CN201520443345U CN205017630U CN 205017630 U CN205017630 U CN 205017630U CN 201520443345 U CN201520443345 U CN 201520443345U CN 205017630 U CN205017630 U CN 205017630U
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Abstract
The utility model provides a LED drive power supply adjusts luminance and turn -offs control circuit, includes: the LED drive power supply unit that rectifier circuit module, the output of input and rectifier circuit module link to each other, dimming control module with the LED drive power supply unit links to each other still includes: auxiliary power supply module and on -off control circuit module, auxiliary power supply module links to each other with the input of on -off control circuit module for provide auxiliary electrical power source through the on -off control circuit module to LED drive power supply unit main control chip, the control end of on -off control circuit module links to each other with the dimming control module, according to the break -make between dimming control module output control signal control auxiliary power supply module and the LED drive power supply unit. Control block detection exports the control signal of first state to adjusting luminance the signal not when presetting the scope, opens circuit LED drive power supply unit stop work, realization LED's dimming -off function between control auxiliary power supply module and the LED drive power supply unit.
Description
Technical field
The application relates to Lighting Control Assembly technical field, more particularly, relates to a kind of LED drive power light modulation and switches off control circuit.
Background technology
At present, along with the extensive use of LED light source, in order to meet the demand of secondary energy-saving, there is Dimmable LED driving power, as Dimmable LED driving powers such as 0-10V light modulation, timing dimmings, but after most tunable optical driving power all cannot realize Dimming-off (light modulation shutoff) function and Dimming-off, low standby power loss cannot be realized, thus waste electric energy, the problem of optimized secondary energy-saving cannot be realized.
See Fig. 1, technical scheme conventional in prior art is between input AC source and LED drive power, add a relay, after detecting that dim signal that dimmer exports is lower than predetermined level, dimmer conveying feeds back signal to controller, controller sends a cut-off signals to relay according to this feedback signal, control described relay to disconnect, the now ac input end no current input of LED drive power, thus close LED drive power, realize the Dimming-off function of low standby power loss and LED.
But, obviously visible, because the technical scheme in Fig. 1 adopts adaptive polarizing memory voltage time constant to realize the Dimming-off function of low standby power loss and LED, because relay inherently has a characteristic of large volume, high cost, the technical scheme in Fig. 1 is therefore caused also to there will be high, the bulky shortcoming of cost.
Utility model content
In view of this, the application provides a kind of LED drive power light modulation to switch off control circuit, for solving Dimmable LED driving power of the prior art, and the problem that production cost is high, equipment volume is large occurred when adopting relay to realize Dimming-off function.
To achieve these goals, the existing scheme proposed is as follows:
A kind of LED drive power light modulation switches off control circuit, comprise: rectification circuit module, the LED drive power unit that input is connected with the output of described rectification circuit module, the dimming controlling module be connected with described LED drive power unit, described dimming controlling module receives dim signal, export dimming control signal and control described LED drive power unit output DC source size, it is characterized in that, also comprise:
Auxiliary power module and on-off control circuit module;
The input of described on-off control circuit module is connected with the output of described auxiliary power module, and output is connected with described LED drive power unit main control chip power end, and control end is connected with described dimming controlling module,
When described dimming controlling module detects described dim signal not in preset range, export the control signal of the first state to described on-off control circuit module, control open circuit between auxiliary power module and LED drive power unit main control chip power end.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described LED drive power unit comprises:
DC converter module and direct current output module;
The input of DC converter module is connected with the output of rectification circuit module, for direct voltage that rectification circuit module is exported after high frequency conversion for direct current output module provides high-frequency direct-current power of chopping;
The input of direct current output module is connected with the output of DC converter module, for the high-frequency direct-current power of chopping of reception is exported DC source to LED illumination device after rectifying and wave-filtering.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described on-off control circuit module comprises:
Triode control module A and triode control module B;
The control end of described triode control module A for obtain that described dimming controlling module exports, for controlling the control signal of described triode control module A break-make;
The control end of described triode control module B for obtain that described dimming controlling module exports, for controlling the control signal of described triode control module B break-make;
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described LED drive power unit also comprises:
Be arranged on the power factor correction module between described DC converting module and described rectification circuit module;
Described power factor correction module, for receiving the direct voltage that described rectification circuit module exports, corrects the power factor of input current, for DC converter module provides DC bus-bar voltage.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, the output of described auxiliary power module is connected with described DC converter module by triode control module A, also comprises:
Be arranged on the delay circuit module between described triode control module A and described DC converter module;
The output of described auxiliary power module is connected with the power end of described power factor correction module by triode control module A.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described triode control module A and/or triode control module B comprises:
First end for obtain dimming controlling module and export control signal, the second end is by the resistance R8 of resistance R9 ground connection;
Light-emitting diodes tube anode is connected with second end of resistance R8, the earthed-cathode optocoupler U1 of light-emitting diode;
The resistance R10 that first end is connected with auxiliary power module output, the second end is connected with the collector electrode of the triode of described optocoupler U1;
Negative electrode is connected with the emitter of the triode of optocoupler U1, the voltage stabilizing didoe ZD2 of plus earth;
The triode Q3 that collector electrode is connected with the first end of described resistance R10, base stage is connected with the negative electrode of described voltage stabilizing didoe ZD2;
The first end of the resistance R11 that first end is connected with the emitter of described triode Q3, the second end is connected with the negative electrode of described voltage stabilizing didoe ZD2, described resistance R11 is as described triode control module A and/or triode control module B output.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described triode control module A and/or triode control module B comprises:
The resistance R4 that first end is connected with the output of described auxiliary power module, the second end is connected with the control signal output of dimming controlling module;
The triode Q1 that base stage is connected with second end of described resistance R4, emitter is connected with the first end of described resistance R4;
Negative electrode is connected with the collector electrode of described triode Q1 by resistance R5, the voltage stabilizing didoe ZD1 of plus earth;
Base stage is connected with the negative electrode of described voltage stabilizing didoe ZD1, collector electrode is connected with the first end of described resistance R4, emitter is as the triode Q2 of the output of described triode control module A and/or triode control module B.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described triode control module A and/or triode control module B, also comprises:
Be arranged on the first control circuit between described dimming controlling module and described resistance R4;
Described first control circuit comprises:
One end is connected with described dimming controlling module control signal output, the other end is by the resistance R1 of resistance R2 ground connection;
The field effect transistor S1 that grid is connected with the common port of resistance R2 with described resistance R1, source ground, drain electrode are connected with second end of described resistance R4 by resistance R3.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described triode control module A and/or triode control module B, also comprises:
One end is connected with the emitter of described triode Q2, the other end is by the resistance R6 of resistance R7 ground connection;
The electric capacity C1 that one end is connected with described voltage stabilizing didoe ZD1 negative electrode, the other end is connected with the common port of resistance R7 with described resistance R6;
The electric capacity C2 in parallel with described resistance R7.
Preferably, during above-mentioned LED drive power light modulation switches off control circuit, described delay circuit module comprises:
First end is connected with the output of described triode control module A, the second end is by the resistance R12 of resistance R13 ground connection;
The electric capacity C3 in parallel with described resistance R13;
The triode Q4 that base stage is connected with second end of described resistance R12, the first end of collector electrode and described resistance R12, emitter are connected with the power end of described DC converter module.
As can be seen from above-mentioned technical scheme, LED drive power light modulation disclosed in the present application switches off control circuit, when described dimming controlling module detects the dim signal of reception not in preset range, the control signal of the first state is exported to described on-off control circuit module, control open circuit between auxiliary power module and LED drive power unit, and then cut off the power supply of LED drive power unit main control chip, described LED drive power unit is quit work, realize the Dimming-off function of LED, reduce the stand-by power consumption of circuit.Visible, in technical scheme disclosed in the above embodiments of the present application, only need to adopt small size, the circuit devcie of low cost can build satisfactory on-off control circuit module, thus make that the cost of technical scheme disclosed in the present application is low, volume is little.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is that a kind of LED drive power light modulation of prior art switches off control circuit system construction drawing;
The structure chart that a kind of LED drive power light modulation that Fig. 2 provides for the embodiment of the present application switches off control circuit;
The structure chart that the LED drive power light modulation that Fig. 3 provides for another embodiment of the application switches off control circuit;
The structure chart that Fig. 4 switches off control circuit for the application's LED drive power light modulation that an embodiment provides again;
The concrete structure figure that Fig. 5 LED drive power light modulation disclosed in the embodiment of the present application switches off control circuit;
Fig. 6 concrete structure figure that LED drive power light modulation switches off control circuit disclosed in another embodiment of the application.
Embodiment
Be directed in prior art when adopting adaptive polarizing memory voltage time constant to realize the secondary energy-saving of tunable optical driving power, high, the bulky problem of the equipment cost caused, this application discloses a kind of LED drive power light modulation and switches off control circuit.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
This application discloses a kind of LED drive power light modulation to switch off control circuit, for realizing the Dimming-off function of LED drive power, its principle is: when determining that dim signal is not in preset range, by cutting off the power supply of LED drive power unit main control chip, only for the load of necessity provides power supply, LED drive power unit is quit work, thus realizes the Dimming-off function of LED, reduce the stand-by power consumption of circuit.
Fig. 2 structure chart that a kind of LED drive power light modulation switches off control circuit disclosed in the embodiment of the present application.
See Fig. 2, this application discloses a kind of LED drive power light modulation and switch off control circuit, comprising:
Rectification circuit module 100, LED drive power unit 101, on-off control circuit module 102, auxiliary power module 103, dimming controlling module 104, described dimming controlling module 104 can be dimmer;
Described rectification module 100, for by output dc voltage after the rectification of input AC source to LED drive power unit 101;
The input of described LED drive power unit 101 is connected with the output of described rectification circuit module 100, for providing DC source for LED illumination circuit (LED) by described direct voltage after high frequency switching converter;
Described dimming controlling module 104 is connected with described LED drive power unit 101, for receiving dim signal, exports dimming control signal to LED drive power unit 101, to control the size of the DC source of described LED illumination circuit;
Auxiliary power module 103 is connected with the input of described on-off control circuit module 102, for being provided for the power end of described LED drive power unit 101 main control chip the accessory power supply controlling the work of described LED drive power unit 101 by on-off control circuit module 102;
The input of described on-off control circuit module 102 is connected with the output of described auxiliary power module 103, output is connected with the main control chip power end of described LED drive power unit 101, control end is connected with described dimming controlling module 104, for obtaining the control signal that described dimming controlling module 104 exports, control the break-make between auxiliary power module 103 and LED drive power unit 101 according to described control signal;
When described dimming controlling module 104 detects described dim signal not in preset range, export the control signal of the first state to described on-off control circuit module 102, control open circuit between auxiliary power module 103 and the main control chip power end of LED drive power unit 101.
When the dim signal that dimming controlling module 104 receives is included in preset parameter range, described control signal controls the conducting of described on-off control circuit module 102, make path between auxiliary power module 103 and described LED drive power unit 101, auxiliary power module 103 by described on-off control circuit module 102 for the main control chip of LED drive power unit 101 provides power supply, LED drive power unit 101 normally works, when the dim signal that dimming controlling module 104 receives is not included in preset parameter range, described control signal controls described on-off control circuit module 102 and disconnects, make open circuit between auxiliary power module 103 and described on-off control circuit module 102, described auxiliary power module 103 stops providing power supply to the main control chip of LED drive power unit 101, LED drive power unit 101 quits work.
Visible see technical scheme disclosed in the above embodiments of the present application, when described dimming controlling module 104 detects dim signal not in preset range, the control signal of the first state is exported to described on-off control circuit module 102, make to control open circuit between auxiliary power module 103 and LED drive power unit 101, and then cut off the power supply of LED drive power unit 101 main control chip, described LED drive power unit 101 is quit work, realize the Dimming-off function of LED, reduce the stand-by power consumption of circuit.Visible, in technical scheme disclosed in the above embodiments of the present application, only need to adopt small size, the circuit devcie of low cost can build satisfactory on-off control circuit module, thus make that the cost of technical scheme disclosed in the present application is low, volume is little.
Be understandable that, conveniently circuit design, described auxiliary power module 103 can be connected with the output of described rectification circuit module 100, input voltage is obtained by described rectification circuit module 100, described auxiliary power module 103 also can be used as the power supply of described dimming controlling module 104 simultaneously, operating voltage is provided to described dimming controlling module 104, now, after described auxiliary power module 103 obtains direct voltage by described commutation supply voltage module 100, to exporting accessory power supply after the direct voltage rectifying and wave-filtering got to on-off control circuit module 102 and dimming controlling module 104.
Be understandable that, disclosed in the above embodiments of the present application, LED drive power unit 101 can adopt the LED drive power of any one structure in prior art, disclosed in certain the above embodiments of the present application, LED drive power unit 101 also can as shown in Figure 3, comprise:
DC converter module 201 and direct current output module 202, the input of described DC converter module 201 is connected with the output of rectification circuit module 100, be supplied to direct current output module 202 for the direct voltage inputted by described rectification circuit module 100 is exported high-frequency direct-current copped wave source after high frequency conversion, the high-frequency direct-current copped wave source of input provides DC source to LED illumination device (such as LED) by described direct current output module 202 after rectifying and wave-filtering.
Be understandable that, see Fig. 3, in the above embodiments of the present application, described on-off control circuit module 102 is corresponding with the DC converter module 201 in Fig. 3 and direct current output module 202, comprising:
Triode control module A203 and triode control module B204, the output of described auxiliary power module 103 is connected with direct current output module 202 one_to_one corresponding with described DC converter module 201 with triode control module B respectively by triode control module A;
The control end of described triode control module A203 is for obtaining the control signal for controlling described triode control module A203 break-make of described dimming controlling module 104 output, when get described dimming controlling module 104 dim signal not in preset range time the control signal that sends after, disconnect the connection between auxiliary power module 103 and described DC converter module 201, stop providing working power to the main control chip of described DC converter module 201;
The control end of described triode control module B204 is for obtaining the control signal for controlling described triode control module B204 break-make of described dimming controlling module 104 output, when get described dimming controlling module 104 dim signal not in preset range time the control signal that sends after, disconnect the connection between auxiliary power module 103 and described direct current output module 202, stop providing working power to the main control chip of described direct current output module 202.
When the dim signal that dimming controlling module 104 receives is not at preset parameter range, dimming controlling module 104 exports the Dimming-off signal (control signal) of first state that is in for disconnecting the connection between auxiliary power module 103 and LED drive power unit 101, described Dimming-off signal is sent to triode control module A203, the main control chip power end of the accessory power supply V1 and DC converter module 201 that control auxiliary power module 103 output disconnects, the described Dimming-off signal being in the first state is also sent to triode control module B204 by dimming controlling module 104 simultaneously, the main control chip power end of the accessory power supply V2 and direct current output module 202 that control auxiliary power module 103 output disconnects, LED drive power unit 101 is quit work,
When the dim signal that dimming controlling module 104 receives is included in preset parameter range, described dimming controlling module 104 exports the Dimming-off signal of second state that is in, make the circuit turn-on between described auxiliary power module 103 to described LED drive power unit 101, the main control chip that auxiliary power module 103 is respectively DC converter module 201 and direct current output module 202 by described triode control module A203 and triode control module B204 provides power supply, and LED drive power unit 101 normally works.
Be understandable that, see Fig. 4, disclosed in the above embodiments of the present application, described LED drive power unit 101 also comprises power factor correction module 200, described power factor correction module 200 is arranged between described DC converter module 201 and described rectification circuit module 100, for receiving the direct voltage that described rectification circuit module 100 exports, DC converter module 201 described in input value after described direct voltage is corrected, and provide DC bus-bar voltage for DC converter module 201, described power factor correction module 200 specifically for, receive direct voltage, the input current of distortion is corrected to sinusoidal current, and make it and input voltage same-phase, thus make power factor close to 1, and provide stable DC bus-bar voltage for DC converter module 201.
Corresponding with the described LED drive power unit 101 with power factor correction module 200, described on-off control circuit module 102 also wraps a delay circuit module 205, described triode control module A receives the accessory power supply V1 that auxiliary power module 103 exports, output is connected with the input of delay circuit module 205 with the main control chip power end of power factor correction module 200, the output of delay circuit module 205 is connected with the main control chip power end of DC converter module 201, described auxiliary power module 103 provides working power by described triode control module A203 to the main control chip of described power factor correction module 200 and described DC converter module 201, described delay circuit module 205 power for the main control chip controlling power factor correction module 200 and DC converter module 201 when system worked well between time delay.
When the dim signal that dimming controlling module 104 receives is not at preset parameter range, the Dimming-off signal being in the first state is sent to triode control module A by dimming controlling module 104, the main control chip power end of the accessory power supply V1 and power factor correction module 200 that control auxiliary power module 103 output disconnects, the input also non-transformer input of delay circuit module 205, the output of described delay circuit module 205 does not just have power supply to export yet, cause the main control chip power-off of DC converter module 201, described power factor correction module 200 is quit work with described DC converter module 201.
Be understandable that, the structure of the triode control module A203 in the above embodiments of the present application can exchange with the structure of triode control module B204 or structure identical.See Fig. 5, described triode control module A203 and/or triode control module B204 can comprise:
Resistance R8, resistance R9, optocoupler U1, resistance R10, triode Q3 (can be NPN type), resistance R11, voltage-stabiliser tube ZD2;
The Dimming-off signal output part that first end and the described light modulation of described resistance R8 switch off control circuit is connected, second end of resistance R8 is connected with the first end of resistance R9 with the light-emitting diodes tube anode of optocoupler U1, second end of resistance R9 is connected with the light-emitting diodes tube cathode of optocoupler U1 and connects and exports ground, the collector electrode of the triode of optocoupler U1 is connected with second end of resistance R10, the emitter of the triode of optocoupler U1 and the negative electrode of voltage-stabiliser tube ZD2, the base stage of triode Q3 and second end of resistance R11 are connected, the anode of voltage-stabiliser tube ZD2 is connected to the ground, the first end of resistance R10 is connected with the V1 output of auxiliary power module 103, and be connected with the collector electrode of triode Q3, the emitter of triode Q3 is connected with the first end of resistance R11, the emitter of described triode Q3 is as the output of described triode control module A203 or triode control module B204.
Its course of work is:
When described dim signal is included in preset parameter range, dimming controlling module exports the Dimming-off signal of second state that is in, after resistance R8 and resistance R9 dividing potential drop, the light-emitting diode controlling optocoupler U1 flows through forward current, the transistor collector of optocoupler U1 to obtain corresponding electric current between emitter, the accessory power supply V1 obtained by described auxiliary power module 103 is through resistance R10, the transistor collector of optocoupler U1 and emitter, be clamped on a magnitude of voltage V1A by voltage-stabiliser tube ZD2, triode Q3 therefore conducting, the emitter of described triode Q3 exports a voltage V1B to LED drive power unit 101 main control chip power end, described magnitude of voltage V1B equals the tube voltage drop (about 0.6V) that described magnitude of voltage V1A deducts triode Q2.
When described dim signal is not in preset parameter range, dimming controlling module exports the Dimming-off signal of first state that is in, after resistance R8 and resistance R9 dividing potential drop, the input diode controlling optocoupler U1 turns off, and then do not flow through electric current between the collector electrode of the output triode of control optocoupler U1 and emitter, triode Q3 is zero because of base voltage and closes, accessory power supply V1 can not send LED drive power unit 101 main control chip power end to, and LED drive power unit 101 is quit work.
Certainly, when adopting the triode control module A203 of said structure to power to the main control chip of described power factor correction module 200 and DC converter module 201 simultaneously, also should comprise delay circuit module 205 in foregoing circuit, see Fig. 5, described delay circuit module 205 can comprise:
First end is connected with the output of described triode control module A, the second end is by the resistance R12 of resistance R13 ground connection;
The electric capacity C3 in parallel with described resistance R13;
The triode Q4 that base stage is connected with second end of described resistance R12, the first end of collector electrode and described resistance R12, emitter are connected with the power end of described DC converter module.
The course of work of described delay circuit module is:
When the dim signal that dimming controlling module 104 exports is not in preset parameter range, the voltage V1B exported by the described triode control module A203 got is through resistance R12, after the RC charging circuit time delay that resistance R13 and electric capacity C3 forms, a base voltage is provided to triode Q4, its size is: V1B*R13/ (R12+R13), after triode Q4 conducting, its emitter exports a voltage V1C and powers to the main control chip of DC converter module 201, described DC converter module 201 is normally worked, described voltage V1C equals the tube voltage drop (about 0.6V) that V1B*R13/ (R12+R13) deducts triode Q4.
Certainly, see Fig. 6, disclosed in the above embodiments of the present application, the concrete structure of described triode control module A203 and/or triode control module B204 can also comprise:
Resistance R4, triode Q1 (for positive-negative-positive), resistance R5, voltage-stabiliser tube ZD1, triode Q2 (NPN type), the Dimming-off signal output part of described dimming controlling module 104 is connected with the base stage of triode Q1 with second end of resistance R4, control conducting or the closedown of triode Q1, the auxiliary source V2 output of described auxiliary power module 103 and the first end of resistance R4, the emitter of triode Q1 is connected with the collector electrode of triode Q2, the collector electrode of triode Q1 is connected with the base stage of triode Q2 with the negative electrode of voltage-stabiliser tube ZD1 by resistance R5, the plus earth of voltage-stabiliser tube ZD1, the emitter of triode Q2 is connected with the power end of LED drive power unit 101 main control chip.
When dim signal is included in preset parameter range, dimming controlling module exports the Dimming-off signal of second state that is in, make triode Q1 conducting because bearing forward voltage drop tube between emitter and base stage, auxiliary source V2 is through triode Q1 and resistance R5, be clamped on a burning voltage V2A by voltage-stabiliser tube ZD1, triode Q2 therefore conducting, the emitter of described triode Q2 exports a voltage V2B to LED drive power unit 101 main control chip power end, described voltage V2B equals the tube voltage drop (about 0.6V) that described magnitude of voltage V2A deducts triode Q2, LED drive power unit 101 normally works,
Preferably, see Fig. 6, triode control module A203 and/or the triode control module B204 of said structure can also comprise: be arranged on the first control circuit between described dimming controlling module 104 and described resistance R4, described first control circuit comprises:
Resistance R1, resistance R2, N-type field effect transistor S1, resistance R3, the Dimming-off signal output part of described dimming controlling module 104 is connected with the first end of resistance R1, and second end of second end of resistance R1 and the grid of field effect transistor S1 and resistance R2, resistance R2 is connected with the source electrode of field effect transistor S1 and ground connection, the drain electrode of field effect transistor S1 is connected with the first end of resistance R3, and second end of resistance R3 is connected with second end of described resistance R4.
When dim signal is included in preset parameter range, the Dimming-off signal of second state that is in that dimming controlling module 104 exports, after resistance R1 and resistance R2 dividing potential drop, controlling field effect transistor S1 conducting, making triode Q1 conducting because bearing forward voltage drop tube between emitter and base stage.
See Fig. 6, in order to ensure the operation that described on-off control circuit module safety is stable, the triode control module A of said structure and/or triode control module B, can also comprise:
Resistance R6, resistance R7, electric capacity C1, electric capacity C2, the power end of described LED drive power unit 101 main control chip is connected with the first end of resistance R6, and the first end of electric capacity C1 is connected with the negative electrode of described voltage-stabiliser tube ZD1, and second end of electric capacity C1 is connected with the first end of second end of resistance R6, resistance R7, the second end ground connection of resistance R7, electric capacity C2 is in parallel with resistance R7.
Being understandable that, the described field effect transistor S1 in the above embodiments of the present application, triode Q1 ~ Q4, can be all any one in field effect transistor, triode or IGBT.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a LED drive power light modulation switches off control circuit, comprise: rectification circuit module, the LED drive power unit that input is connected with the output of described rectification circuit module, the dimming controlling module be connected with described LED drive power unit, described dimming controlling module receives dim signal, export dimming control signal and control described LED drive power unit output DC source size, it is characterized in that, also comprise:
Auxiliary power module and on-off control circuit module;
The input of described on-off control circuit module is connected with the output of described auxiliary power module, and output is connected with described LED drive power unit main control chip power end, and control end is connected with described dimming controlling module;
When described dimming controlling module detects described dim signal not in preset range, export the control signal of the first state to described on-off control circuit module, control open circuit between auxiliary power module and LED drive power unit main control chip power end.
2. LED drive power light modulation according to claim 1 switches off control circuit, and it is characterized in that, described LED drive power unit comprises:
DC converter module and direct current output module;
The input of DC converter module is connected with the output of rectification circuit module, for direct voltage that rectification circuit module is exported after high frequency conversion for direct current output module provides high-frequency direct-current power of chopping;
The input of direct current output module is connected with the output of DC converter module, for the high-frequency direct-current power of chopping of reception is exported DC source to LED illumination device after rectifying and wave-filtering.
3. LED drive power light modulation according to claim 2 switches off control circuit, and it is characterized in that, described on-off control circuit module comprises:
Triode control module A and triode control module B;
The control end of described triode control module A for obtain that described dimming controlling module exports, for controlling the control signal of described triode control module A break-make;
The control end of described triode control module B for obtain that described dimming controlling module exports, for controlling the control signal of described triode control module B break-make;
The output of described auxiliary power module is connected with direct current output module one_to_one corresponding with described DC converter module with triode control module B respectively by triode control module A.
4. LED drive power light modulation according to claim 3 switches off control circuit, and it is characterized in that, described LED drive power unit also comprises:
Be arranged on the power factor correction module between described DC converting module and described rectification circuit module;
Described power factor correction module, for receiving the direct voltage that described rectification circuit module exports, corrects the power factor of input current, for DC converter module provides DC bus-bar voltage.
5. LED drive power light modulation according to claim 4 switches off control circuit, and it is characterized in that, the output of described auxiliary power module is connected with described DC converter module by triode control module A, also comprises:
Be arranged on the delay circuit module between described triode control module A and described DC converter module;
The output of described auxiliary power module is connected with the power end of described power factor correction module by triode control module A.
6. LED drive power light modulation according to claim 3 switches off control circuit, and it is characterized in that, described triode control module A and/or triode control module B comprises:
First end for obtain dimming controlling module and export control signal, the second end is by the resistance R8 of resistance R9 ground connection;
Light-emitting diodes tube anode is connected with second end of resistance R8, the earthed-cathode optocoupler U1 of light-emitting diode;
The resistance R10 that first end is connected with auxiliary power module output, the second end is connected with the collector electrode of the triode of described optocoupler U1;
Negative electrode is connected with the emitter of the triode of optocoupler U1, the voltage stabilizing didoe ZD2 of plus earth;
The triode Q3 that collector electrode is connected with the first end of described resistance R10, base stage is connected with the negative electrode of described voltage stabilizing didoe ZD2;
The first end of the resistance R11 that first end is connected with the emitter of described triode Q3, the second end is connected with the negative electrode of described voltage stabilizing didoe ZD2, described resistance R11 is as described triode control module A and/or triode control module B output.
7. LED drive power light modulation according to claim 3 switches off control circuit, and it is characterized in that, described triode control module A and/or triode control module B comprises:
The resistance R4 that first end is connected with the output of described auxiliary power module, the second end is connected with the control signal output of dimming controlling module;
The triode Q1 that base stage is connected with second end of described resistance R4, emitter is connected with the first end of described resistance R4;
Negative electrode is connected with the collector electrode of described triode Q1 by resistance R5, the voltage stabilizing didoe ZD1 of plus earth;
Base stage is connected with the negative electrode of described voltage stabilizing didoe ZD1, collector electrode is connected with the first end of described resistance R4, emitter is as the triode Q2 of the output of described triode control module A and/or triode control module B.
8. LED drive power light modulation according to claim 7 switches off control circuit, and it is characterized in that, described triode control module A and/or triode control module B, also comprises:
Be arranged on the first control circuit between described dimming controlling module and described resistance R4;
Described first control circuit comprises:
One end is connected with described dimming controlling module control signal output, the other end is by the resistance R1 of resistance R2 ground connection;
The field effect transistor S1 that grid is connected with the common port of resistance R2 with described resistance R1, source ground, drain electrode are connected with second end of described resistance R4 by resistance R3.
9. LED drive power light modulation according to claim 6 switches off control circuit, and it is characterized in that, described triode control module A and/or triode control module B, also comprises:
One end is connected with the emitter of described triode Q2, the other end is by the resistance R6 of resistance R7 ground connection;
The electric capacity C1 that one end is connected with described voltage stabilizing didoe ZD1 negative electrode, the other end is connected with the common port of resistance R7 with described resistance R6;
The electric capacity C2 in parallel with described resistance R7.
10. LED drive power light modulation according to claim 5 switches off control circuit, and it is characterized in that, described delay circuit module comprises:
First end is connected with the output of described triode control module A, the second end is by the resistance R12 of resistance R13 ground connection;
The electric capacity C3 in parallel with described resistance R13;
The triode Q4 that base stage is connected with second end of described resistance R12, the first end of collector electrode and described resistance R12, emitter are connected with the power end of described DC converter module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443345.4U CN205017630U (en) | 2015-06-25 | 2015-06-25 | LED drive power supply adjusts luminance and turn -offs control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443345.4U CN205017630U (en) | 2015-06-25 | 2015-06-25 | LED drive power supply adjusts luminance and turn -offs control circuit |
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| CN205017630U true CN205017630U (en) | 2016-02-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567148A (en) * | 2017-09-30 | 2018-01-09 | 深圳市宝泰光电科技有限公司 | A kind of LED drive device |
| CN107949113A (en) * | 2017-12-06 | 2018-04-20 | 北京小米移动软件有限公司 | LED light control circuit and LED light |
| CN108391347A (en) * | 2018-04-12 | 2018-08-10 | 上海阿卡得电子有限公司 | A kind of light adjusting circuit for LED drivings |
-
2015
- 2015-06-25 CN CN201520443345.4U patent/CN205017630U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567148A (en) * | 2017-09-30 | 2018-01-09 | 深圳市宝泰光电科技有限公司 | A kind of LED drive device |
| CN107949113A (en) * | 2017-12-06 | 2018-04-20 | 北京小米移动软件有限公司 | LED light control circuit and LED light |
| CN108391347A (en) * | 2018-04-12 | 2018-08-10 | 上海阿卡得电子有限公司 | A kind of light adjusting circuit for LED drivings |
| CN108391347B (en) * | 2018-04-12 | 2023-12-15 | 上海阿卡得电子有限公司 | Dimming circuit for LED driving |
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