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MOSO announced global patent about

2019-09-16

LED Driving Power Supply Circuit

 

CN Application CN108322964A

Priority 2018-04-03 • Filing 2018-04-03 • Publication 2018-07-24

 

Abstract

The invention discloses an LED driving power supply circuit, which comprises a light modulation unit, a control unit, a communication unit and a power supply unit, wherein the light modulation unit issued for receiving a first light modulation signal sent by a light modulator and filtering the first light modulation signal; the control unit is connected with the light modulation unit, and is used for outputting a second light modulation signal to power supply voltage for light modulation according to the first light modulation signal and communicating with a CD-R machine to output a corresponding feedback signal according to a burning signal sent by the CD-R machine; the communication unit is connected with the control unit, and is used for feeding back the feedback signal output by the control unit to the CD-R machine; the power supply unit is connected with the control unit, and is used for supplying power to the control unit; and the light modulation unit, the control unit, the power supply unit and the communication unit are all connected to a multiplex interface for connection of the light modulator or the CD-R machine. The number of interfaces and the number of connection wires can be reduced; the cost can be reduced; and the structural design can be optimized.

CN108322964A

CN Application

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Priority date

2018-04-03

 

Family: CN (1)

Date App/Pub Number Status

2018-04-03 CN 201810286053

2018-07-24 CN108322964A Application

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Description

translated from Chinese

LED driving power supply circuit

FIELD

[0001] The present invention relates to power electronic technologies, and in particular, relates to an LED driving power supply circuit.

Background technique

[0002] With the development of technology and economy, LED has been widely used in people's daily life, LED energy saving, environmental protection, long life and high efficiency light emission, and the LED driving power supply circuit as an energy source in the LED LED fIELD occupy a very important position. Typically LED driving power supply circuit having a dimming function and programmable functions, dimming function refers specifically to the LED driver dimmer dimming interface circuit connected to the power supply, and power supply output current by changing the voltage or duty cycle variation, thereby LED dimming the lamp; programming specifically refers writer and can be programmed through an interface connected to the LED driving power supply circuit programming. Therefore, the dimmer and the burner and LH) lamp driving power supply circuit are connected via two-wire line and LED, LED driving power supply circuit at least three two-wire lead. This will cause the cost of the LED driving power supply circuit is thus increased, and the size and design more difficult, a direct impact on the user's installation and use, the power and lighting suited miniaturization trends.

SUMMARY

Example embodiments provide [0003] The present invention is an LED driving power supply circuit, the prior art to solve the LED driving power supply circuit when the dimming function and programmable features require at least three technical issues drawn two core wires.

[0004] The embodiments of the present invention provides an LED driving power supply circuit comprising a dimming cell, a control unit, a communication unit and a power supply unit, a first adjusting means for dimming the light signal receiver and transmitting the dimmer filtering process; the unit and the dimming control unit is connected, according to the dimming signal output of the first dimming signal to a second supply voltage for dimming, and for communication with a burner to the signal output of the burner the burner transmits a corresponding feedback signal; said communication unit is connected with the control unit, a feedback signal for the feedback control unit outputs to the burner; and the the power supply unit is connected with the control unit, for controlling the power supply unit; wherein the dimming unit, control unit, power supply unit and a communication unit are connected to the multiplexing interface for the dimmer or the burner is connected.

[0005] Further, the power supply unit comprises an electronic unit for, two and three for the electronic unit for an electronic unit, a supply of the electronic unit, the unit and two electron donor for the three electronic units are connected to each other, when the multiplexing interface of the dimmer, the power supply voltage supplied by the electronic unit and an electronic unit for the two to the control unit to supply power; if the when multiplexing interface connecting the said burner, said burner through said one of said two supply and electronic unit electronic unit for supplying power to the control unit; when the multiplexing floating interfaces, the supply voltage for the primary electron donor unit and said secondary unit of the electronic power control unit, an electronic unit for outputting the three third dimming signal to the multiplexing interface.

[0006] Further, the electronic unit comprises a second supply transistor, a second diode, the first zener diode, a sixth capacitor, a seventh capacitor, and a twelfth resistor; the second the positive electrode is connected to the supply voltage of the diode, the anode of the second diode connected to the collector of the second transistor, the base of the second transistor is connected to a first electrode stability negative pressure of the diode, the cathode of the first zener diode is grounded, and the positive and negative electrodes connected in parallel between said second diode of said first zener diode electrically sixth capacitance and the seventh Valley , and a base connected to the collector electrode of the officer brother eleven poles between which the twelfth resistor, the emitter electrode of the second diode is used as an output terminal of the electron donor is connected to the single Wu said two electron donor unit and an input of the three input terminals for electronic units.

[0007] Further, the power supply unit further comprises a first diode, the first diode anode is connected to the multiplexing interface, the cathode of the diode is connected to the electronic unit a donor. one

[0008] Further, the unit comprises two electron donating twenty-eighth resistor, a second regulator member, a fifth transistor, a fourteenth resistor, a fifth resistor, and capacitor seventeenth; the fifth the collector of the transistor for the input of the two electronic units connected to a supply output of the electronic unit and the three input terminals for an electronic unit, the fifth base of the transistor ground element through said second regulator, said fifth transistor is connected between the base and the collector of which the twenty-eighth resistor, the resistor and the seventeenth fourteenth resistor in series with each other after the fifth capacitor in parallel with a fifth capacitor connected to ground and another end connected to an emitter of said fifth transistor, the emitter of the fifth transistor as said secondary supply electronic unit an output terminal connected to the control unit to be powered.

[0009] Further, the second element is a regulator TL431 chip, a negative regulator of the second connector element according to a fifth base of the transistor, the second positive ground regulator member, the with reference to said second zener diode is connected between the resistor and the seventeenth fourteenth resistor.

[0010] Further, the three supply electronic unit includes a thirteenth resistor, a third constant voltage element, a fourth diode, a resistor twentieth, twenty-first and twenty-fourth resistor resistance; the one end of the output terminal of the thirteenth resistor and an electron donor as a unit and the input of the three electron donating two supply unit and the electronic unit is connected to an input terminal, the other of said thirteenth resistor one end grounded via the third constant voltage element, the cathode of the fourth diode connected between said third constant voltage element and the thirteenth resistor, the anode of the fourth diode via the said twenty-twenty-fourth resistor and said resistor is grounded, the end of a second resistor ^^ is connected between the cathode of the fourth diode twentieth resistor, said second the other end of the resistor is connected to the eleven multiplexing interface.

[0011] Further, the third element is a voltage regulator TL431 chip, a negative regulator of the third element is connected to the thirteenth resistor, to ground the positive electrode of the third constant voltage element, the third stable reference level voltage element connected between the twentieth and the twenty-fourth resistor resistance.

[0012] Furthermore, the dimming means comprising a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor and a third capacitor; end of the eighth resistor is connected to the multiplexing interface, and the other end by the said seventh resistor connected to the control unit; said ninth resistor and the third capacitor is connected in parallel between one end of said seventh resistor and the eighth resistor, the other end grounded; the end of the second capacitor a seventh resistor connected between the control unit and the other of the second capacitor 'known ground.

[0013] Further, the communication unit comprises a third diode, the third transistor, a fourth transistor, a fifteenth resistor, the resistance eighteenth, nineteenth and twenty-second resistor resistance; the positive electrode of the third diode is connected to the multiplexing interface, connected to the anode of the third diode to the collector of the fourth transistor, the emitter of the fourth transistor is grounded, the said fourth transistor base connected to the emitter electrode between which the twenty-second resistor, the base electrode of the fourth transistor through said third transistor connected to a nineteenth resistor a collector, the emitter of the third transistor and the base of said fifteenth resistor connected between the base electrode of the third tube through three of the eighteenth resistor connected to the control unit.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention by the dimming unit, control unit, power supply unit and a communication unit are connected to the multiplexing interface for a dimmer connected or burn , so that the dimmer and the burner may share an interface to achieve the dimming function and programming functions, and an interface cable saving, lower costs, optimize the structure design.

BRIEF DESCRIPTION

[0015] In order to more clearly illustrate the technical solutions of the present embodiment of the invention, briefly describes the accompanying drawings required for describing the embodiments used in the following embodiments will be apparent in the following description of the accompanying drawings show some embodiments of the present invention, for ordinary skill in the art, without creative efforts, you can obtain other drawings based on these drawings.

[0016] FIG. 1 is a block schematic diagram of an LED driving power supply circuit according to an embodiment of the present invention;

[0017] FIG. 2 shows a schematic circuit structure of the present invention to provide an LED driving power supply circuit of the embodiment;

[0018] FIG. 3 is a LH according to an embodiment of the present invention) driving block schematic circuit diagram of a power supply unit;

[0019] FIG. 4 shows the embodiment of the present invention provides a schematic diagram of the LED driving power supply circuit connected to the practical application.

detailed description

[0020] below in conjunction with the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described embodiments are part of the embodiments of the present invention rather than all embodiments . Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

[0021] It should be appreciated that, when used in this specification and the appended claims, the terms "comprises" and "comprising" indicates that the described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components and / or the presence or addition of collection.

[0022] It should also be understood that the terminology used in the present description of the invention only and are not intended to limit the present invention for the purpose of describing particular embodiments. As used in the specification and the appended claims of the invention as used in the book, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0023] It will be further understood that the present description the specification and the appended claims, the term "and / or" means that one item associated listed combinations of any and all possible combinations or in a plurality, and these include combinations.

[0024] Referring to Figure 1, embodiments provide an LED driving power supply circuit 100 of the present invention, which includes a dimming section 110, the control unit 120, the power supply unit 140 and a communication unit 130, the control unit 120 may employ a control chip the control unit 120 simultaneously with the light control unit 110, the power supply unit 140 and the communication unit 130 is connected. Wherein the dimming cell 110 for transmitting a first modulated optical signal receiver 200 and the dimmer filter processing; the control unit 120 according to the power supply for the first dimming signal output of the second dimming signal voltage dimming, the control unit 120 is further configured to communicate with the burner 300 to burn a corresponding transmitted signal output of the burner 300 a feedback signal; the communication unit 130 for the the control unit 120 outputs a feedback signal 300 to the burner; the power supply unit 140 to the control unit 120 for supplying power; wherein said light control unit 110, control unit 120, the power supply communication unit 140, and unit 130 are connected to a multiplexing interface 300 for connection to the dimmer 200 or the programmer. By the above design, the dimmer 200 and the burner 300 through the multiplexing interface 120 is connected to the control unit, so the dimmer 200 and the programmer 300 may share an interface to functionality and dimming programming, and save the interface cable, reduce costs, optimize design.

[0025] Referring to FIG 2, FIG 3, in one embodiment, for example, in the present embodiment, the power supply unit 140 includes an electron donor unit 141, two 142 and three for the electronic unit for an electronic unit 143, the an electron donor unit 141 described later, the two supply voltage of the electronic unit 142, and three electron donor unit 143 are connected to each other, corresponding to the multiplexing interface circuit diagram shown in DIM + pin 2, the power supply is LED driving power supply voltage of the motherboard power provided by the power supply voltage DVCC pin 2 a circuit diagram corresponding to the graph, when the multiplexing of the dimmer interface 200, by the supply voltage DVCC to the The control unit 120 supplies power. In particular, the supply voltage DVCC by the electronic unit 141 outputs a supply voltage 15v DC, and then through the two electron donor unit 142 outputs a reference DC voltage 5V to power the control unit 120. When the multiplexing interface suspended, the power supply to the DVCC voltage supply unit 141 through an electron donor and said secondary control unit 142, the power supply unit 120, the unit 143 outputs three electron donating third dimming signal to the multiplexing interface, in particular, the third dimming signal is 10V, so the control unit 120 outputs a dimming signal of 100% duty cycle such that most light LED lamp. Conventional LED driving power supply circuit when using the programming function need to build a test environment, need to be equipped AC power, power meter, LED lighting load, etc., to simulate the real conditions of use to an LED driver power supply circuit, ensure that the LED driving power supply circuit internal dimming module programming power supply in order to achieve normal, high operating environment requirements, complicated operation, low efficiency. The present invention may be implemented and does not require an external power supply to complete the programming function, implemented off-line programming, in particular, when the supply voltage is 〇V, 3〇〇 by the burner control unit 120 of the power supply, when the multiplexed interfaces 300 connecting the burner, the burner 300 to burn the input signal, a programming signal is a square pulse to 10V serial signal, said programming input 300 of the burner into a signal for the electronic unit 141 and the reference voltage of the DC supply electronic unit 142 outputs two 5V regulated power supply to the control unit 120 through the first diode D1.

[0026] In one embodiment, for example in the present embodiment, the electronic unit 141 includes a second supply transistor Q2, a second diode D2, the zener diode ZD1 is the first, sixth capacitor C6, seventh capacitor C7, and a twelfth resistor R12; the second diode D2 and the cathode is connected to the supply voltage, the cathode of the second diode D2 and the collector of the second transistor Q2 is an electrode connected to the base of the second transistor Q2 is connected to the anode of the first zener diode ZD1, the cathode of the first zener diode ZD1 to the ground, the second diode D2 and the negative electrode the collector and the base of said sixth capacitor C6 connected in parallel between the anode of the first zener diode ZD1 and the seventh capacitor C7, the second three diode Q2 is connected between the twelfth resistor R12, the second three diode Q2 at the emitter as an output end of the electronic unit 141 is connected to the two input terminals for an electronic unit 142 and the unit 143 of the three electron donating an input terminal, in particular, the second transistor Q2 is an NPN transistor.

[0027] In one embodiment, for example in the present embodiment, the unit 142 includes two electron donating twenty-eighth resistor R28, a second regulator member U2, a fifth transistor Q5, fourteenth resistor R14 , a seventeenth resistor 417 and a fifth capacitor C5, the collector of the fifth transistor Q5 of the two electron donor unit 142 is connected to the input of an output end 141 and the electronic unit three input terminals for an electronic unit 143, the fifth transistor Q5 through the base of the second regulator circuit U2 is grounded, is connected between the collector of the fifth transistor Q5 has a base twenty eighth resistor R28, the resistor R14 and the fourteenth to the seventeenth resistor R17 connected in series to each other in parallel with the fifth capacitor C5, the fifth capacitor C5- grounded, and the other end connected to the transmitting a fifth transistor Q5 is, the fifth emitter of the transistor Q5 is used as said secondary supply output of the electronic unit 142 to the control unit 120 is connected to its power supply, in particular, the said second voltage regulation element is a TL431 chip U2, U2 is connected to the anode of said second regulator member of the fifth transistor Q5 group The second regulator U2 is positive ground member, said second regulator member reference U2 is connected between the resistor R14 and the fourteenth to the seventeenth resistor R17, in particular, the first five of the NPN transistor Q5, of course, be appreciated that the second regulator circuit U2 may be other elements may be implemented in the linear regulator.

[0028] In one embodiment, for example in the present embodiment, the three electron donating unit 143 includes a thirteenth resistor R13, a third regulator U3 element, the fourth diode D4, a twentieth resistor R20, output terminal of the twenty-first resistor R21 and a twenty-fourth resistor R24, a thirteenth resistor R13 and one end of a donor as a unit and the input of the three electron donor 141 and the unit 143 said two electron donor input unit 142, and the other end of the thirteenth resistor R13 through the third constant voltage element U3 is grounded, the cathode of the fourth diode D4 is connected to said third stable U3 between the pressure member and the thirteenth resistor R13, through the cathode of the fourth diode D4 of the twentieth resistor R20 and the resistor R24 is grounded twenty-fourth, the twenty-first resistor One end of R21 is connected between the cathode of the fourth diode D4 of the twentieth resistor R20, the other end of the twenty-first resistor R21 is connected to the multiplexing interface, in particular, the first three element U3 is TL431 regulator chip, the negative electrode connecting member of the third regulator U3, a thirteenth resistor R13, a third regulator U3 positive ground element, the third reference level regulator U3 element connected between the twentieth and the twenty-fourth resistor R20 resistor R24, of course, be appreciated that the third regulator U3 element may be other elements of the linear regulator can be achieved. [0029] In one embodiment, for example in the present embodiment, the light control unit 110 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second capacitor C2 and a C3 third capacitor; the first one end of the eight resistor R8 connected multiplexing interface, through which the other end of the seventh resistor R7 120 is connected to the control unit, said ninth resistor R9 and the third capacitor C3 is connected in parallel with one end of the seventh between the resistor R7 and an eighth resistor R8, the other end, the end of the second capacitor C2 is connected between the seventh resistor R7 and the control unit 120, the other end of the second capacitor C2 ground.

[0030] In one embodiment, for example in the present embodiment, the communication unit 130 includes a third diode D3, the third transistor Q3, a fourth transistor Q4, a fifteenth resistor R15, the eleventh eight resistors R18, a nineteenth resistor R19 and a twenty-second resistor R22; the third diode D3 is connected to the positive of the multiplexing interface, connected to the anode of the third diode D3 of the fourth three- the electrode collector of Q4, the emitter of the fourth transistor Q4 is grounded, the base of the fourth transistor Q4 has a twenty-second resistor R22 is connected between the emitter of said first four base of transistor Q4 through the resistor R19 connected to the collector of the nineteenth of the third transistor Q3 is connected to the second electrode of the third transistor Q3 between the emitter and the base fifteen resistor R15, the third transistor Q3 of the three base connected to the control unit 120 through the TX pin of the eighteenth resistor R18, in particular, the third transistor Q3 is a PNP transistor, the fourth transistor Q4 are NPN transistor.

[0031] The following detailed description of the working principle of the present invention in respective states:

[0032] When dimming, the multiplexing interface connector 200 of the dimmer, the dimmer 200 of the first dimming signal inputted to the dimming unit 110, the first signal is a dimming 0 to 10V analog signal, after the light receiving unit 110 of the first dimming signal and a dimming signal of the first filtering process modulated outputs to the control unit 120, the control unit 120 through the program algorithm a second dimming signal output duty ratio to the stable supply voltage for dimming. For example, when the first dimming signal IV, the control unit 120 of the first dimming signal through the output module changes the duty ratio of 10%, an amplitude of the second dimming signal to 5V reduce the brightness of the LED lamp; when the first dimming signal is 10V, the control unit 120 of the first dimming signal through the change in the output modulo 100% duty cycle, the amplitude of the second 5V dimming signal to increase the brightness of the LED lamp; the second dimming signal is a PWM signal. In the process of the dimming is controlled by the supply voltage DVCC power supply unit, in particular, the supply voltage supplied by the electronic unit 141 outputs a 15v DC voltage, and then through the two electron donor unit 142 5V DC output voltage to supply power to the control unit 120.

[0033] When programming, the multiplexing interface 300 is connected to the burner, the burner 300 to burn the input signal to the control unit 120, the programming signal is a serial pulse signal of 0 to 10V, after R5 third divided signal via the resistor R3 and the fifth resistor programming said programming signal is input to the control unit 120 of the RX pin, the pin TX control unit 120 outputs a feedback signal to the communication unit 130, the feedback signal via the communication unit 130 returns to the programmer 300. For example, when the control unit TX pin is 0V, the third transistor Q3 is turned on, the high-level reference voltage 5V of the third transistor Q3 emitter potential of the ground, the nineteenth through the twenty-second resistor R19 and the resistor R22 turning on the fourth dividing transistor Q4, since the fourth transistor Q4 is turned on is the reset voltage interface pull-down, the output of a low level of the feedback signal to the burner 3〇〇; when TX pin of the control unit is 5V, the third transistor Q3 is turned off, so that the fourth transistor Q4 is turned off, this time the three electron donor unit 143 through the feedback resistor R21 to the twenty-first outputs a high level signal to the programmer 300. In short, the control unit 120 receives the programming signal and the feedback signal output pin TX RX pin to communicate with the programmer 300. During programming, the control unit 120 may be programmed to complete in the absence of external power, off-line programming to achieve, in particular, the supply voltage is 0V, the burner 300 by the control unit 120 the supply when the multiplexed interfaces 300 connected to the burner, the burner burning 3〇〇 input signal, said programming signal is a serial pulse signal billion to 10V, the input burner 300 signal into a burn through the first diode 141 and an electronic unit for the reference voltage of the DC supply electronic unit 142 outputs two 5V regulated power supply to the control unit 120.

When the [0034] floating, the floating multiplexing interface, the control unit 120 by the supply voltage DVCC power is supplied by the unit 141 and an electron donor for the two electronic unit 142, this time the three an output stage for an electronic unit 143 to the third dimming signal multiplexing interface, in particular, the third dimming signal is 10V, the control unit 120 detects the interface to the multiplexing potential of 10V, so that the said control unit 120 outputs a dimming signal of 100% duty cycle to be transferred to the most light LED lamp.

[0035] Referring to Figure 4, which shows a schematic diagram of the present invention, the LED driving power supply circuit connected to the practical application of the embodiment, an LED driving power supply circuit 100, a dimmer 200, burner 300 and LED lamp 400, the LED driving power supply circuit 100 of the above embodiment of the LED driving power supply circuit 100, the input terminal of the LED driving power supply circuit 100 is connected to AC power, the power output of the LED drive circuit 100 is connected to the LED lamp 400, the the dimmer 200 and the programmer 300 through the interface and the multiplexing Lm) connected to the driving power supply circuit 100, the above design, so the dimmer 200 and the programmer 300 may share an interface to functionality and dimming programming, and save the interface cable, reduce costs, optimize design.

[0036] The LED driving power supply circuit according to the present invention by the dimming unit, control unit, power supply unit and a communication unit are connected to the multiplexing interface for a dimmer or writer is connected, so that the dimmer and the burner may a common interface to achieve dimming function and programming functions, and an interface cable saving, lower costs, optimize the structure design.

[0037] The above are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the scope of the invention disclosed may be readily figured equivalent modification or replacement, such modifications or replacements shall fall within the scope of the present invention. Accordingly, the scope of the present invention should be defined by the scope of the claims.

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Priority And Related Applications

Priority Applications (1)

Application Priority date Filing date Title

CN 201810286053 2018-04-03 2018-04-03 LED driving power supply circuit

Applications Claiming Priority (1)

Application Filing date Title

CN 201810286053 2018-04-03 LED driving power supply circuit

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2018-07-24 PB01

2018-08-17 SE01


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