WO2022217693A1 - 一种稳压供电的调光电源模块及led调光装置 - Google Patents

一种稳压供电的调光电源模块及led调光装置 Download PDF

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Publication number
WO2022217693A1
WO2022217693A1 PCT/CN2021/094264 CN2021094264W WO2022217693A1 WO 2022217693 A1 WO2022217693 A1 WO 2022217693A1 CN 2021094264 W CN2021094264 W CN 2021094264W WO 2022217693 A1 WO2022217693 A1 WO 2022217693A1
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WIPO (PCT)
Prior art keywords
resistor
dimming
voltage
capacitor
power supply
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PCT/CN2021/094264
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English (en)
French (fr)
Inventor
方继发
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深圳市安规科技有限公司
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Publication of WO2022217693A1 publication Critical patent/WO2022217693A1/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/392—Switched mode power supply [SMPS] wherein the LEDs are placed as freewheeling diodes at the secondary side of an isolation transformer

Definitions

  • the invention relates to the field of electronic technology, in particular to a dimming power supply module and an LED dimming device with regulated power supply.
  • the conversion dimming circuit should be controlled by a single-chip microcomputer in the conversion dimming circuit.
  • the common LED power modules use more chips and more components, and the cost will increase, resulting in the large size of the power module, which is not conducive to the development of miniaturization.
  • the previous stage circuit at least outputs a constant voltage, which is equivalent to an additional conversion circuit. If a constant current chip is used for power supply, due to the protection problem of the constant current chip itself, the power supply VCC will be converted into a triangular wave at no load, resulting in unstable power supply. Therefore, the existing constant current scheme cannot provide stable power supply to the microcontroller.
  • the embodiments of the present invention provide a dimming power supply module and an LED dimming device with regulated power supply, so as to solve the problem that the existing LED power supply module cannot provide stable power supply to the microcontroller.
  • the embodiment of the present invention provides a dimming power supply module with regulated power supply, which is connected to an LED light string and a dimmer, and includes a control circuit, a voltage stabilizing circuit, a dimming circuit and an output port, and the control circuit is connected to the voltage stabilizing circuit,
  • the dimming circuit and the output port, the dimming circuit is connected with the voltage regulator circuit and the output port, and the output port is connected with the LED light string and the dimmer.
  • the control circuit converts the commercial power into a supply voltage and outputs power to the LED light string through the output port.
  • the voltage stabilizer circuit senses the voltage inside the control circuit and generates a first voltage and a second voltage, stabilizes the second voltage and outputs it to the microcontroller in the dimming circuit to supply power, and outputs the first voltage to set the dimming circuit. Voltage regulation range.
  • the output port transmits the dimming signal output by the dimmer to the dimming circuit, and the dimming circuit generates a corresponding pulse width modulation signal according to the dimming signal.
  • the control circuit controls the magnitude of the power supply current according to the pulse width modulation signal, and outputs through the output port to dim the LED light string.
  • the voltage stabilizing circuit includes a first diode, a second diode, a first capacitor, a second capacitor, a first transistor, a first Two transistors, a first resistor, a second resistor, a first Zener tube and a second Zener tube.
  • the anode of the first diode is connected to the cathode of the second diode and the control circuit; the cathode of the first diode is connected to one end of the first capacitor, one end of the first resistor and the collector of the first triode; The other end of the first capacitor is connected to the control circuit and one end of the second capacitor, the other end of the second capacitor is connected to the anode of the second diode and the dimming ground, and the base of the first transistor is connected to the other end of the first resistor and the negative pole of the first voltage regulator; the emitter of the first transistor is connected to the first voltage terminal, the collector of the second transistor and one end of the second resistor; the emitter of the second transistor is connected to the second voltage The base of the second transistor is connected to the other end of the second resistor and the negative electrode of the second Zener tube, and the positive pole of the first Zener tube and the positive pole of the second Zener tube are both connected to the dimming ground.
  • the regulated circuit further includes a third resistor, a third capacitor and a fourth capacitor.
  • the third resistor is connected in parallel with the second capacitor, one end of the third capacitor is connected to the emitter of the first triode and the first voltage terminal, one end of the fourth capacitor is connected to one end of the second resistor, and the other end of the third capacitor is connected The other end of the fourth capacitor and the dimming ground.
  • the dimming circuit includes a first single-chip microcomputer, a first optocoupler, a third transistor, a fourth transistor, a fourth resistor, a fifth resistor, sixth resistor, seventh resistor and eighth resistor.
  • the VDD pin of the first microcontroller is connected to the second voltage terminal
  • the ADJ pin of the first microcontroller is connected to one end of the fifth resistor and one end of the sixth resistor
  • the other end of the fifth resistor is connected to one end of the fourth resistor and the first end of the output port.
  • Pin 1 the other end of the fourth resistor is connected to the first voltage terminal, the other end of the sixth resistor and the GND pin of the first microcontroller are connected to the dimming ground, and the PWM pin of the first microcontroller is connected to the base of the third triode,
  • the emitter of the third transistor is connected to the dimming ground and the second pin of the first optocoupler, the collector of the third transistor is connected to the second voltage terminal and the first pin of the first optocoupler, the first optocoupler
  • the third pin is connected to the emitter of the fourth transistor and the ground, the fourth pin of the first optocoupler is connected to the base of the fourth transistor and one end of the seventh resistor, and the collector of the fourth transistor is connected to the eighth One end of the resistor is connected to the PWM pin of the dimming chip, and the other end of the seventh resistor is connected to the other end of the eighth resistor and the third voltage end.
  • the dimming circuit further includes a ninth resistor and a third voltage regulator.
  • One end of the ninth resistor is connected to the other end of the fifth resistor and the first pin of the output port, the other end of the ninth resistor is connected to the negative electrode of the third voltage regulator tube, and the positive electrode of the third voltage regulator tube is connected to the other end of the sixth resistor. one end.
  • the dimming circuit further includes a tenth resistor, a fifth capacitor and a sixth capacitor.
  • One end of the tenth resistor is connected to the ADJ pin of the first microcontroller and one end of the fifth capacitor, the other end of the tenth resistor is connected to one end of the fifth resistor and one end of the sixth resistor, and the other end of the fifth capacitor is connected to the dimming ground , the sixth capacitor is connected between the VDD pin of the first microcontroller and the dimming ground.
  • the dimming circuit further includes an eleventh resistor, a twelfth resistor and a thirteenth resistor.
  • the eleventh resistor is connected between the base of the third triode and the PWM pin of the first microcontroller, and the twelfth resistor is connected between the base of the third triode and the emitter of the third triode. Meanwhile, the thirteenth resistor is connected between the collector of the third triode and the second voltage terminal.
  • the regulated circuit includes a third diode, a seventh capacitor, an eighth capacitor, a fifth transistor, a sixth transistor, a third The fourteenth resistor, the fifteenth resistor, the fourth Zener tube and the fifth Zener tube; the anode of the third diode is connected to the control circuit; the cathode of the third diode is connected to one end of the seventh capacitor, the tenth One end of the four resistors is connected to the collector of the fifth transistor; the other end of the seventh capacitor is connected to one end of the eighth capacitor, the other end of the eighth capacitor is connected to the control circuit and the dimming ground, and the base of the fifth transistor is connected The other end of the fourteenth resistor and the negative electrode of the fourth voltage regulator; the emitter of the fifth transistor is connected to the first voltage terminal, the collector of the sixth transistor and one end of the fifteenth resistor; the sixth transistor The emitter of the tube is connected to the second voltage terminal, the base of the sixth transistor is
  • a second aspect of the embodiments of the present invention provides an LED dimming device, which includes an LED light string and a dimmer, and also includes the dimming power supply module with regulated power supply, and the dimming power supply module with regulated power supply is connected to LED string lights and dimmers.
  • the dimming power supply module with regulated power supply converts the commercial power into a supply voltage to supply power to the LED light string, and also generates a second voltage and performs voltage stabilization processing to supply power to the internal single-chip microcomputer; the dimmer outputs a dimming signal to the voltage regulator A dimming power supply module powered by a power supply, the dimming power supply module with regulated power supply performs dimming on the LED light string according to the dimming signal.
  • the dimming power supply module with regulated power supply includes a control circuit, a regulated circuit, a dimming circuit and an output port; the control circuit converts the commercial power into a supply voltage and outputs it to the LED lights through the output port String power supply; the voltage regulator circuit senses the voltage inside the control circuit and generates a first voltage and a second voltage, stabilises the second voltage and outputs it to the microcontroller in the dimming circuit to supply power, and outputs the first voltage to set the dimming circuit
  • the output port transmits the dimming signal output by the dimmer to the dimming circuit, and the dimming circuit generates the corresponding pulse width modulation signal according to the dimming signal; the control circuit controls the size of the power supply current according to the pulse width modulation signal, Output through the output port to dim the LED string.
  • It can output a stable second voltage to supply power to the single-chip microcomputer, thereby solving the problem that the existing LED power module cannot provide stable power supply for the single-chip microcomputer; compared with the existing technology, the output first voltage leaves a margin, so that the dimming circuit can realize 0 ⁇ 10V dimming.
  • FIG. 1 is a structural block diagram of an LED dimming device in Embodiment 1 of the present invention.
  • FIG. 2 is a schematic circuit diagram of a control circuit and an output port in Embodiment 1 of the present invention.
  • FIG. 3 is a schematic circuit diagram of a voltage regulator circuit in Embodiment 1 of the present invention.
  • FIG. 4 is a schematic circuit diagram of a dimming circuit in Embodiment 1 of the present invention.
  • FIG. 5 is a schematic circuit diagram of a voltage regulator circuit in Embodiment 2 of the present invention.
  • FIG. 6 is a schematic circuit diagram of a control circuit and an output port in Embodiment 3 of the present invention.
  • FIG. 7 is a schematic circuit diagram of a control circuit and an output port in Embodiment 4 of the present invention.
  • FIG. 8 is a schematic circuit diagram of a control circuit and an output port in Embodiment 5 of the present invention.
  • FIG. 9 is a schematic circuit diagram of a voltage regulator circuit and a part of a dimming circuit in Embodiment 6 of the present invention.
  • FIG. 10 is a schematic circuit diagram of another part of the dimming circuit in the sixth embodiment of the present invention.
  • an LED dimming device provided by an embodiment of the present invention includes a dimming power supply module 10 powered by a constant voltage, an LED light string 20 and a dimmer 30; the dimming power supply module 10 powered by a constant voltage is connected to the LED lamp String 20 and dimmer 30.
  • the regulated power supply dimming power module 10 converts the commercial power into a power supply voltage (LED ⁇ ) to supply power to the LED light string 20, and also generates a second voltage and performs voltage regulation processing to the internal single-chip microcomputer (according to different pins.
  • the single-chip microcomputer is divided into a first single-chip microcomputer and a second single-chip microcomputer) to supply power;
  • the dimmer 30 outputs the corresponding dimming signal DIM+ according to the user's operation to the dimming power supply module 10 with regulated power supply, the dimming power supply module with regulated power supply 10 dimming the LED light string 20 according to the dimming signal DIM+.
  • the dimming power supply module 10 with regulated power supply includes a circuit board, and the circuit board is provided with a control circuit 110 , a voltage stabilizing circuit 120 , a dimming circuit 130 and an output Port 140; the control circuit 110 is connected to the voltage regulator circuit 120, the dimming circuit 130 and the output port 140, the voltage regulator circuit 120 is connected to the dimming circuit 130, the dimming circuit 130 is connected to the output port 140, and the output port 140 is connected to the LED light string 20 and dimmer 30.
  • the control circuit 110 converts the commercial power into the power supply voltage LED ⁇ and the third voltage 16V, and outputs the power supply voltage LED ⁇ through the output port 140 to supply power to the LED light string 20;
  • the first voltage 12V and the second voltage 5VCC are generated, the second voltage 5VCC is regulated and then output to the microcontroller in the dimming circuit 130 to supply power, and the first voltage 12V is output to set the voltage regulation range of the dimming circuit;
  • the output port 140 transmits the dimming signal DIM+ output by the dimmer to the dimming circuit 130, and the dimming circuit 130 generates the corresponding pulse width modulation signal PWM according to the dimming signal DIM+;
  • the control circuit 110 controls the pulse width modulation signal PWM according to The magnitude of the power supply current is output through the output port 140 to dim the LED light string.
  • the circuit of the control circuit 110 is shown in FIG. 2 , which is in the prior art, and its specific circuit connection relationship is not described in detail here.
  • a in FIG. 2 represents a flying lead.
  • the mains input is processed (such as rectification, filtering) and then transmitted to the driver chip U1 whose model is preferably BP2636C.
  • the driver chip U1 is used to realize constant voltage driving, and the output voltage Vout supplies power to the dimming chip U2.
  • the dimming chip U2, whose model is preferably BP3179F, is an isolated low-PF dimmable LED driver controller suitable for flyback circuits. It supports PWM and analog dimming signals throughout the entire analog dimming.
  • the GATE pin output of the dimming chip U2 corresponds to The signal controls the on-off state of the first switch tube QA (NMOS tube can be used), the transformer (the model is preferably EF16 or EE16, including 3 windings, namely the first winding T1A, the second winding T1B and the third winding T1C)
  • the transformer the model is preferably EF16 or EE16, including 3 windings, namely the first winding T1A, the second winding T1B and the third winding T1C
  • the dimming chip U2 also controls the waveform output by the CS pin according to the pulse width modulation signal PWM input from the dimming circuit 130, and adjusts the magnitude of the output current, so as to realize the dimming control of the LED light string (eg brightness control).
  • the output port 140 is an existing common port, each pin can be customized, and each pin only plays the role of signal transmission, which is convenient for connecting external LED light strings and dimmers; the model of the output port is not specified here. limited.
  • the control circuit 110 is composed of an APFC (active power factor correction) and a flyback separated form. Since the output flyback of the control circuit 110 is a constant current control, there is no constant voltage function, and the output cannot be output. Constant voltage stable voltage.
  • Embodiment 1 The voltage on the second winding T1B of the transformer in the control circuit 110 is used to perform voltage conversion and voltage regulation processing by setting the voltage regulator circuit 120 to stably supply power to the first microcontroller in the dimming circuit 130 .
  • the voltage regulator circuit 120 includes a first diode D1, a second diode D2, a first capacitor C1, a second capacitor C2, a first transistor Q1, a second transistor Q2, a first resistor R1, The second resistor R2, the first Zener tube ZDS1 and the second Zener tube ZDS2; the anode of the first diode D1 is connected to the cathode of the second diode D2 and the fifth pin of the transformer (that is, the second The same name end of winding T1B); the cathode of the first diode D1 is connected to one end of the first capacitor C1, one end of the first resistor R1 and the collector of the first transistor Q1; the other end of the first capacitor C1 is connected to the control circuit Pin 6 of the middle transformer (that is, the synonymous end of the second winding T1B of the transformer) and one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the anode of the second diode D2 and the dimming ground PG
  • the base of a transistor Q1 is connected to the other end of the first resistor R1 and the negative electrode of the first voltage regulator ZDS1; the emitter of the first transistor Q1 is connected to the first voltage terminal (providing a first voltage of 12V 12V), The collector of the second transistor Q2 and one end of the second resistor R2; the emitter of the second transistor Q2 is connected to the second voltage terminal (the second voltage of 5V is output 5VCC), and the base of the second transistor Q2 The other end of the second resistor R2 is connected to the negative electrode of the second voltage regulator ZDS2, and the positive electrode of the first voltage regulator ZDS1 and the positive electrode of the second voltage regulator ZDS2 are both connected to the dimming ground PGND.
  • the dimming ground PGND is the ground in the dimmer, and the dimming ground PGND is connected to the second pin of the output port, and is connected to the ground in the dimmer through a connecting wire.
  • the second capacitor C2 is an electrolytic capacitor with a polarized capacitor with a specification of 33uF/100V;
  • the first voltage regulator ZDS1 is a voltage regulator diode with a voltage regulation value of 12V, and the second voltage regulator tube ZDS2 is a voltage regulator tube with a voltage regulation value of 5V. voltage diode.
  • the voltages induced on the second winding T1B of the transformer during the entire power switching process are all superimposed on the first capacitor C1 and the second capacitor C2. , to achieve the stability of the voltage on C2.
  • the first transistor Q1, the first resistor R1 and the first voltage regulator ZDS1 form a set of voltage regulator circuits, which stabilize the voltage on the second capacitor C2 at 12V and output a first voltage of 12V.
  • the second transistor Q2, the second resistor R2 and the second voltage regulator ZDS2 form another set of voltage regulator circuits, which clamp and stabilize the second voltage 5VCC on the second voltage terminal at 5V and output to the dimming circuit 130
  • the first MCU stable power supply is provided to the first MCU stable power supply.
  • the voltage regulator circuit 120 further includes a third resistor R3, a third capacitor C3 and a fourth capacitor C4; the third resistor R3 is connected in parallel with the second capacitor C2, One end of the third capacitor C3 is connected to the emitter of the first transistor Q1 and the first voltage terminal, one end of the fourth capacitor C4 is connected to one end of the second resistor R2, and the other end of the third capacitor C3 is connected to the other end of the fourth capacitor C4 One end and the dimming ground PGND.
  • the second voltage 5VCC is generated by the step-down of the first voltage 12V.
  • the first voltage 12V is stabilized by filtering C3 and C4, and the second voltage 5VCC can be indirectly stabilized; the third resistor R3 is used to supply the first voltage regulator ZDS1 Limiting.
  • the voltage regulator circuit 120 outputs the first voltage of 12V. Since 12V leaves a margin for the voltage amplitude, dimming from 0V to 10V can be achieved, and the voltage regulation range of the dimming circuit can be set. It is 0 ⁇ 10V; it can also generate a stable second voltage 5VCC to supply power to the first single-chip microcomputer, so as to solve the problem that the existing LED power module cannot provide stable power supply to the first single-chip microcomputer.
  • the dimming circuit 130 includes a first single-chip microcomputer U3, a first optocoupler PC1, a third transistor Q3, a fourth transistor Q4, a fourth resistor R4, and a third transistor Q3.
  • One end of the six resistors R6, the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the first pin of the output port 140, the other end of the fourth resistor R4 is connected to the first voltage terminal, and the other end of the sixth resistor R6 and
  • the GND pins of the first microcontroller U3 are connected to the dimming ground PGND, the PWM pins of the first microcontroller U3 are connected to the base of the third transistor Q3, and the emitter of the third transistor Q3 is connected to the dimming ground PGND and the first light.
  • the second pin of the coupling PC1 the collector of the third transistor Q3 is connected to the second voltage terminal and the first pin of the first optocoupler PC1, and the third pin of the first optocoupler PC1 is connected to the emission of the fourth transistor Q4 pole and ground
  • the fourth pin of the first optocoupler PC1 is connected to the base of the fourth transistor Q4 and one end of the seventh resistor R7
  • the collector of the fourth transistor Q4 is connected to one end of the eighth resistor R8 and the dimming
  • the other end of the seventh resistor R7 is connected to the other end of the eighth resistor R8 and the third voltage end (outputting a third voltage of 16V).
  • the third transistor Q3 and the fourth transistor Q4 are NPN transistors, and the model of the first single-chip microcomputer U3 is not limited, as long as the first single-chip microcomputer can be programmed, the first single-chip microcomputer U2 can be set according to the program. pin order and function.
  • R4-R6 are used to realize the adjustment and control of the pulse width modulation signal PWM by the first microcontroller U3, R7 is used to supply power to the first optocoupler PC1, and R8 is used to pull up the pulse width modulation signal PWM.
  • the externally input dimming signal DIM+ When the externally input dimming signal DIM+ is high level, it is input to the ADJ pin of the first microcontroller after voltage division through R4-R6, and the PWM pin of the first microcontroller outputs a low level to control the third transistor Q3 to turn off, and the first light
  • the coupling PC1 is turned on, the fourth transistor Q4 is turned off, and the pulse width modulation signal PWM outputs a high level.
  • the PWM pin of the first microcontroller When the dimming signal DIM+ is at a low level, the PWM pin of the first microcontroller outputs a high level to control the third transistor Q3 to be turned on, the first optocoupler PC1 is turned off, the fourth transistor Q4 is turned on, and the pulse width modulation signal PWM output low level.
  • the pulse width modulation signal PWM is transmitted to the dimming chip U2 to control the waveform output by the CS pin, so as to adjust the size of the output current and realize the light and dark adjustment of the brightness of the LED light string.
  • the dimming circuit 130 further includes a ninth resistor R9 and a third voltage regulator ZDS3.
  • One end of the ninth resistor R9 is connected to the other end of the fifth resistor R5 and the first pin of the output port 140.
  • the ninth resistor R9 The other end of the resistor R9 is connected to the negative electrode of the third voltage regulator ZDS3, and the positive electrode of the third voltage regulator ZDS3 is connected to the other end of the sixth resistor R6. Since the ADJ pin of the first microcontroller U3 is relatively weak, the ADJ pin of the first microcontroller U3 is protected by a protection circuit composed of the ninth resistor R9 and the third voltage regulator ZDS3.
  • the dimming circuit 130 further includes a tenth resistor R10, a fifth capacitor C5 and a sixth capacitor C6; one end of the tenth resistor R10 is connected to the ADJ pin of the first microcontroller U3 and one end of the fifth capacitor C5, The other end of the tenth resistor R10 is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, the other end of the fifth capacitor C5 is connected to the dimming ground, and the sixth capacitor C6 is connected to the VDD pin of the first microcontroller U3 and the dimming ground. between ground and PGND.
  • the tenth resistor R10 is used to adjust the light sensitivity to better match the dimmer.
  • the fifth capacitor C5 is used for filtering external sensitive signals
  • the sixth capacitor C6 is used for filtering the second voltage 5VCC input into the first single-chip microcomputer, so as to further improve the stability of power supply to the first single-chip microcomputer.
  • the dimming circuit 130 further includes an eleventh resistor R11, a twelfth resistor R12 and a thirteenth resistor R13; the eleventh resistor R11 is connected between the base of the third transistor Q3 and the first Between the PWM pins of the microcontroller U3, the twelfth resistor R12 is connected between the base of the third transistor Q3 and the emitter of the third transistor Q3, and the thirteenth resistor R13 is connected to the third transistor Q3 between the collector and the second voltage terminal. Since the signal output by the PWM pin of the first single-chip microcomputer U3 is weak, the third transistor Q3 can be more stably turned on and off by driving the eleventh resistor R11 to control the third transistor Q3. The pull-down effect of the twelfth resistor R12 can ensure that the third transistor Q3 is completely turned off when it is not working.
  • the thirteenth resistor R13 is used to pin 1) power supply.
  • control circuit has the same circuit and working principle as the control circuit 110 in the first embodiment, as shown in FIG. 2;
  • the circuit and working principle are the same, as shown in Figure 4.
  • the voltage stabilizing circuit in the second embodiment includes a third diode D3, a seventh capacitor C7, an eighth capacitor C8, and a fifth transistor.
  • Q5 the sixth transistor Q6, the fourteenth resistor R14, the fifteenth resistor R15, the fourth voltage regulator ZDS4 and the fifth voltage regulator ZDS5
  • the anode of the third diode D3 is connected to the fifth voltage regulator of the transformer pin (that is, the same name terminal of the second winding T1B of the transformer)
  • the negative pole of the third diode D3 is connected to one end of the seventh capacitor C7, one end of the fourteenth resistor R14 and the collector of the fifth transistor Q5;
  • the seventh The other end of the capacitor C7 is connected to one end of the eighth capacitor C8, and the other end of the eighth capacitor C8 is connected to the 6th pin of the transformer (that is, the synonymous end of the second winding T1B of the transformer) and the dimming ground PGND, the fifth transistor
  • the voltage regulator circuit further includes a sixteenth resistor R16, a ninth capacitor C9 and a tenth capacitor C10; the sixteenth resistor R16 In parallel with the eighth capacitor C8, one end of the ninth capacitor C9 is connected to the emitter of the fifth transistor Q5 and the first voltage terminal, one end of the tenth capacitor C10 is connected to one end of the fifteenth resistor R15, and the other end of the ninth capacitor C9 is connected. One end is connected to the other end of the tenth capacitor C10 and the dimming ground GND.
  • the second voltage 5VCC is generated by the step-down of the first voltage 12V, and the first voltage 12V is stabilized by filtering C9 and C10, which can indirectly stabilize the second voltage 5VCC; the sixteenth resistor R16 is used for the first voltage regulator tube ZDS1 current limiting.
  • the embodiment of the present invention mainly improves the voltage stabilizing circuit, and the voltage stabilizing circuit can be used in conjunction with control circuits with different functions to realize the first step in the dimming circuit.
  • control circuit can be replaced with the APFC (active power factor correction) + BUCK (step-down circuit topology) circuit shown in FIG.
  • the single-chip microcomputer is powered; it is a modification on the basis of the second embodiment, and the difference from the second embodiment is that the first winding T1A of the transformer and its peripheral circuits are different (as shown in the dotted box in FIG. The 3rd and 4th pins of the transformer are used, so they are not shown in the figure), as shown in Figure 6, other circuit structures are the same (the names of the devices in the same part are the same as those in the second embodiment, indicating that they are the same device ), which is the prior art, and its circuit connection is not described in detail here.
  • the voltage stabilizing circuit in the third embodiment can use the voltage stabilizing circuit in the second embodiment.
  • the seventh capacitor C7 can be replaced by a connecting wire, and the rest of the circuits remain unchanged.
  • the dimming circuit in the third embodiment is the same as the dimming circuit in the second embodiment shown in FIG. 4 .
  • the control circuit can be replaced with the constant current single-stage low PF (power factor) isolation circuit shown in FIG. 7, which is a modification on the basis of the first embodiment.
  • the difference from the first embodiment is that The driver chip U1 and its peripheral circuits are removed, and other circuit structures are the same (the names of the devices in the same part are the same as those in the first embodiment, indicating that they are the same device), which is the prior art, and its circuit connections are not detailed here. described.
  • the control circuit in the fourth embodiment can only perform 1 ⁇ 10V dimming
  • the voltage regulator circuit in the fourth embodiment can use the voltage regulator circuit in the first embodiment shown in FIG. 3 to superimpose the voltage and output the first 12V A voltage of 12V is used to achieve 0 ⁇ 10V dimming with a margin.
  • the dimming circuit in the fourth embodiment is the same as the dimming circuit in the first embodiment shown in FIG. 4 .
  • control circuit can be replaced with the constant current single-stage low PF (power factor) non-isolated circuit shown in FIG. 8 , which is a modification on the basis of the first embodiment.
  • the driver chip U1 and its peripheral circuits are removed, the first winding T1A of the transformer and its peripheral circuits are different (pins 3 and 4 of the transformer are not used, so they are not shown in the figure), other circuit structures are the same (same part
  • the names of each device in the above are the same as those in the first embodiment, indicating that they are the same device), which is the prior art, and its circuit connection will not be described in detail here.
  • the voltage regulator circuit in the fifth embodiment can use the voltage regulator circuit in the first embodiment shown in FIG. 3 to superimpose the voltage and output the first 12V A voltage of 12V is used to achieve 0 ⁇ 10V dimming with a margin.
  • the dimming circuit in the fifth embodiment is the same as the dimming circuit in the first embodiment shown in FIG. 4 .
  • the main purpose is to improve the voltage regulator circuit and the dimming circuit.
  • the control circuit can be any one of Fig. 1, Fig. 6, Fig. 7 or Fig. 8, as long as the control circuit of the dimming chip U2 is provided. Be applicable.
  • the voltage regulator circuit (represented by the reference numeral 120_1/) includes a voltage regulator U4, a fourth diode D4, a fifth diode D5, a seventh diode
  • the base of the seventh transistor Q7 is connected to the cathode of the fifth diode D5 and the other end of the eighteenth resistor R18, the anode of the fifth diode D5 is connected to the other end of the eleventh capacitor C11, the tenth The other end of the seven resistor R17, the third pin of the transformer (ie the same name terminal of the second winding T1B of the transformer) and the dimming ground PGND; the OUT pin (ie the output pin) of the voltage regulator U4 is connected to the seventh transistor Q7
  • the model of the voltage stabilizer U4 is preferably 78L05. All the voltages induced on the second winding T1B of the transformer are superimposed on the eleventh capacitor C11 through the fourth diode D4, so that the voltage on C11 is stabilized.
  • the seventh transistor Q7 is used for linear voltage regulation, stabilizes the voltage on the eleventh capacitor C11 at 12V, outputs a first voltage of 12V, and provides a pull-up high level for the dimming signal DIM+.
  • the voltage stabilizer U4 outputs the second voltage 5VCC according to the first voltage, and stabilizes the output at 5V, so as to stably supply power to the second microcontroller in the dimming circuit.
  • the dimming circuit includes a second single-chip microcomputer U5, a second optocoupler PC2, a sixth voltage regulator ZDS6, an eighth transistor Q8, and a ninth third The diode Q9, the thirteenth transistor Q10, the eleventh transistor Q11, the second switch transistor Qb, the sixth diode D6, the nineteenth resistor R19 and the twentieth resistor R20; the second single-chip microcomputer U5
  • the VDD pin is connected to the IN pin of the regulator U4, the first pin of the second optocoupler PC2 and the collector of the eighth transistor Q8;
  • the GND pin of the second microcontroller U5 is connected to the dimming ground PGND, the eighth transistor
  • the PWM pin of the second microcontroller U5 is connected to the base of the eighth transistor Q8, and the ADJ pin of the second microcontroller U5 is connected to one end of the nineteenth resistor R19 and the first One end
  • the model of the second single-chip microcomputer U5 is not limited, as long as the single-chip microcomputer can be programmed, the sequence and function of each pin of the second single-chip microcomputer U5 can be set according to the program.
  • R19 and R20 are used to realize the adjustment and control of the pulse width modulation signal PWM by the second microcontroller U5.
  • the ninth transistor Q9 and the thirteenth transistor Q10 are used to amplify the pulse width modulation signal PWM and then transmit it to the DIM pin of the dimming chip U2.
  • the eleventh transistor Q11 is a linear voltage regulator. Since its base and emitter are both pulled up to a high level by the third voltage of 16V, Q11 remains on, and the third voltage 16V is output from the emitter of Q11.
  • the second switch transistor Qb is an OVP transistor.
  • the dimming signal DIM+ When the dimming signal DIM+ is at a high level, it is divided by R19 and R20 and then input to the ADJ pin of the second microcontroller, the PWM pin of the second microcontroller outputs a high level to control the eighth transistor Q8 to be turned on, and the second optocoupler PC2 is turned off , the base of the ninth transistor Q9 is pulled up by the third voltage 16V and turned on, the base of the thirteenth transistor Q10 is pulled down to a low level, and the pulse width modulation signal PWM outputs a high level (by the third voltage 16V). voltage 16V pull-up).
  • the PWM pin of the second microcontroller When the dimming signal DIM+ is at a low level, the PWM pin of the second microcontroller outputs a low level to control the eighth transistor Q8 to be turned off, the second optocoupler PC2 is turned on, and the base of the ninth transistor Q9 is pulled down and turned off , the base of the thirteenth transistor Q10 is pulled up by the third voltage 16V and turned on, and the pulse width modulation signal PWM outputs a low level (pulled down by Q10).
  • the dimming signal DIM+ is a signal whose periodic high and low levels change, the corresponding pulse width modulation signal PWM can be output.
  • the pulse width modulation signal PWM is transmitted to the dimming chip U2 to control the waveform output by the CS pin, so as to adjust the size of the output current and realize the light and dark adjustment of the brightness of the LED light string.
  • the second switch Qb When the pulse width modulation signal PWM is at a high level, the second switch Qb is controlled to be turned on by the sixth diode D6 (unidirectional conduction); when the pulse width modulation signal PWM is at a low level, due to the The gate is grounded and turned off. In this way, when the low end of the dimming and the output are no-load, the maximum output voltage is controlled by the second switch tube Qb.
  • the high level is provided by the third voltage 16V, which can ensure that the transformer first outputs the third voltage 16V and then generates the pulse width modulation signal PWM, so as to ensure that the power supply will not have the problem of power-on flashing.
  • the dimming circuit further comprises a seventh voltage regulator ZDS7, a thirteenth capacitor C13, a fourteenth capacitor C14, a twenty-first resistor R21, a twenty-second resistor R22 and a twenty-third resistor R23;
  • the positive electrode of the seventh voltage regulator ZDS7 is connected to the dimming ground
  • the negative electrode of the seventh voltage regulator ZDS7 is connected to one end of the 22nd resistor R22 and one end of the 13th capacitor C13 through the 21st resistor R21
  • the second The other end of the twelve resistor R22 is connected to the OUT pin of the voltage regulator U4, the other end of the thirteenth capacitor C13 is connected to the dimming ground
  • one end of the twenty-third resistor R23 is connected to one end of the nineteenth resistor R19 and the twentieth resistor.
  • One end of R20, the other end of the twenty-third resistor R23 is connected to the ADJ pin of the second microcontroller U5 and one end of the fourteenth capacitor C14, and the other end of the fourteenth capacitor C14 is connected to the dimming ground.
  • the seventh voltage regulator ZDS7 and the twenty-first resistor R21 are used to stabilize the dimming signal DIM+, and the twenty-second resistor R22 and the thirteenth capacitor C13 are used to filter and limit the current of the dimming signal DIM+.
  • the twenty-third resistor R23 and the fourteenth capacitor C14 are used to filter the divided voltage of the dimming signal DIM+.
  • the dimming circuit further includes a fifteenth capacitor C15, a twenty-fourth resistor R24, a twenty-fifth resistor R25 and a twenty-sixth resistor R26; one end of the fifteenth capacitor C15 is connected to the second single-chip microcomputer
  • the other end of R24 is connected to the SW pin of the second microcontroller U5, one end of the twenty-fifth resistor R25 is connected to the PWM pin of the second microcontroller U5, and the other end of the twenty-fifth resistor R25 is connected to the base of the eighth transistor Q8.
  • One end of the twenty-sixth resistor R26 is connected to the IN pin of the voltage regulator U4, and the other end of the twenty-sixth resistor R26 is connected to the first pin of the second optocoupler PC2 and the collector of the eighth transistor Q8.
  • the fifteenth capacitor C15 is used to filter the second voltage 5VCC, so that the operation of the second microcontroller is more stable.
  • the twenty-fourth resistor R24 is used to protect the SW pin
  • the twenty-fifth resistor R25 is used to protect the eighth transistor Q8 (to avoid sudden high voltage burning out Q8)
  • the twenty-sixth resistor R26 is used to protect the second optocoupler PC2 (To avoid the second voltage 5VCC being too high to burn out PC2, and to stably supply power to PC2).
  • the dimming circuit further includes a sixteenth capacitor C16, a seventeenth capacitor C17, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, and a twenty-eighth resistor R29.
  • one end of the sixteenth capacitor C16 is connected to the fourth pin of the second optocoupler PC2, one end of the twenty-seventh resistor R27 and one end of the twenty-ninth resistor R29; the sixteenth capacitor C16 The other end is connected to the third pin of the second optocoupler PC2, one end of the twenty-eighth resistor R28 and the ground; the other end of the twenty-seventh resistor R27 is connected to the other end of the twenty-eighth resistor R28 and the ninth transistor Q9
  • the other end of the twenty-ninth resistor R29 is connected to the emitter of the eleventh transistor Q11, one end of the thirtieth resistor R30 and one end of the thirty-first resistor R31; the other end of the thirtieth resistor R30 Connect the collector of the ninth transistor Q9, the other end of the thirty-first resistor R31 is connected to the collector of the thirteenth transistor Q10, and one end of the seventeenth capacitor C17 is connected to
  • C16, R27, R28 are used to filter the base voltage of Q9.
  • R29 is used to pull up the base voltage of Q9
  • R30 is used to pull up the base voltage of Q10
  • R31 is used to limit the current of the output pulse width modulation signal PWM.
  • the dimming circuit further includes a seventh diode D7, an eighteenth capacitor C18, a nineteenth capacitor C19, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34 and The thirty-fifth resistor R35; the anode of the seventh diode D7 is connected to the emitter of the eleventh transistor Q11 and one end of the eighteenth capacitor C18, and the cathode of the seventh diode D7 is connected to the eleventh The collector of the diode Q11 and one end of the thirty-second resistor R32, the other end of the eighteenth capacitor C18 is connected to the third pin of the second optocoupler PC2 and the ground, and the other end of the thirty-second resistor R32 is connected to the eleventh The base of the transistor Q11, one end of the thirty-third resistor R33 is connected to the gate of the second switch Qb and the cathode of the sixth diode D6, and the other
  • the source one end of the thirty-fifth resistor R35 and the ground; one end of the thirty-fourth resistor R34 is connected to the drain of the second switch Qb, and the other end of the thirty-fourth resistor R34 is connected to one end of the nineteenth capacitor C19 and The other end of the thirty-fifth resistor R35 and the other end of the nineteenth capacitor C19 are connected to the positive electrode of the sixth voltage regulator ZDS6, one end of the thirty-fifth resistor R35 and the ground.
  • the eighteenth capacitor C18 is used to filter the third voltage 16V output by Q11.
  • R34, R35 and C19 are used to protect Qb.
  • a dialer SW can also be set in the dimming circuit, and a corresponding adjustment signal DIM+ is output according to a user's dialing operation.
  • the dimming power supply module and LED dimming device provided by the present invention can not only output a stable constant voltage to supply power to the microcontroller, but also realize the flicker-free function of outputting adjustable power to ensure normal dimming.
  • the structure of the voltage stabilization circuit is simple, and compared with the prior art, the constant voltage module and the corresponding chip can be removed, the cost is reduced, and the volume of the dimming power supply module with voltage stabilization power supply is reduced.

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Abstract

本发明实施例公开了一种稳压供电的调光电源模块及LED调光装置，稳压供电的调光电源模块包括控制电路、稳压电路、调光电路和输出端口；控制电路将市电转换为供电电压并通过输出端口输出给LED灯串供电；稳压电路感应控制电路内部的电压并生成第一电压和第二电压，对第二电压进行稳压处理后输出给调光电路中的单片机供电，输出第一电压来设置调光电路的调压范围；输出端口将调光器输出的调光信号传输给调光电路，调光电路根据调光信号生成对应的脉宽调制信号；控制电路根据脉宽调制信号控制供电电流的大小，通过输出端口输出以对LED灯串进行调光。能输出稳定的第二电压给单片机供电，还能根据第一电压来实现0~10V的调光。

Description

一种稳压供电的调光电源模块及LED调光装置 技术领域
本发明涉及电子技术领域，尤其涉及一种稳压供电的调光电源模块及LED调光装置。
 背景技术
目前常见的LED电源模块的方案有三种，第一种是交流转直流电路（AC-DC，采用恒压芯片）加上单片机或直流转直流电路（DC-DC，采用恒流调光芯片），第二种是交流转直流（AC-DC，采用恒流芯片)加上去频闪芯片和应放转换调光电路，第三种是交流转直流（AC-DC，采用恒流芯片)加上应放转换调光电路，应放转换调光电路中使用单片机来控制。
这几种方式使用的芯片较多，元器件也相对多，成本会增加，导致电源模块的尺寸偏大，不利于体积的小型化发展。同时，若要输出恒流，前一级电路至少输出恒压，相当于多了一转换电路。若使用恒流芯片来供电，由于恒流芯片自身的保护问题，电源VCC在空载都会转成三角波，导致供电不稳定。因此现有的恒流方案不能给单片机提供稳定供电。
 技术问题
目前常见的LED电源模块使用的芯片较多，元器件也相对多，成本会增加，导致电源模块的尺寸偏大，不利于体积的小型化发展。同时，若要输出恒流，前一级电路至少输出恒压，相当于多了一转换电路。若使用恒流芯片来供电，由于恒流芯片自身的保护问题，电源VCC在空载都会转成三角波，导致供电不稳定。因此现有的恒流方案不能给单片机提供稳定供电。
 技术解决方案
针对上述技术问题，本发明实施例提供了一种稳压供电的调光电源模块及LED调光装置，以解决现有LED电源模块不能给单片机提供稳定供电的问题。
本发明实施例提供一种稳压供电的调光电源模块，连接LED灯串和调光器，其包括控制电路、稳压电路、调光电路和输出端口，所述控制电路连接稳压电路、调光电路和输出端口，调光电路连接稳压电路和输出端口，输出端口连接LED灯串和调光器。
所述控制电路将市电转换为供电电压并通过输出端口输出给LED灯串供电。
所述稳压电路感应控制电路内部的电压并生成第一电压和第二电压，对第二电压进行稳压处理后输出给调光电路中的单片机供电，输出第一电压来设置调光电路的调压范围。
所述输出端口将调光器输出的调光信号传输给调光电路，所述调光电路根据调光信号生成对应的脉宽调制信号。
所述控制电路根据脉宽调制信号控制供电电流的大小，通过输出端口输出以对LED灯串进行调光。
可选地，所述的稳压供电的调光电源模块中，所述稳压电路包括第一二极管、第二二极管、第一电容、第二电容、第一三极管、第二三极管、第一电阻、第二电阻、第一稳压管和第二稳压管。
所述第一二极管的正极连接第二二极管的负极和控制电路；第一二极管的负极连接第一电容的一端、第一电阻的一端和第一三极管的集电极；第一电容的另一端连接控制电路和第二电容的一端，第二电容的另一端连接第二二极管的正极和调光地，第一三极管的基极连接第一电阻的另一端和第一稳压管的负极；第一三极管的发射极连接第一电压端、第二三极管的集电极和第二电阻的一端；第二三极管的发射极连接第二电压端，第二三极管的基极连接第二电阻的另一端和第二稳压管的负极，第一稳压管的正极和第二稳压管的正极均连接调光地。
可选地，所述的稳压供电的调光电源模块中，所述稳压电路还包括第三电阻、第三电容和第四电容。
所述第三电阻与第二电容并联，第三电容的一端连接第一三极管的发射极和第一电压端，第四电容的一端连接第二电阻的一端，第三电容的另一端连接第四电容的另一端和调光地。
可选地，所述的稳压供电的调光电源模块中，所述调光电路包括第一单片机、第一光耦、第三三极管、第四三极管、第四电阻、第五电阻、第六电阻、第七电阻和第八电阻。
所述第一单片机的VDD脚连接第二电压端，第一单片机的ADJ脚连接第五电阻的一端和第六电阻的一端，第五电阻的另一端连接第四电阻的一端和输出端口的第1脚，第四电阻的另一端连接第一电压端，第六电阻的另一端和第一单片机的GND脚均连接调光地，第一单片机的PWM脚连接第三三极管的基极，第三三极管的发射极连接调光地和第一光耦的第2脚，第三三极管的集电极连接第二电压端和第一光耦的第1脚，第一光耦的第3脚连接第四三极管的发射极和地，第一光耦的第4脚连接第四三极管的基极和第七电阻的一端，第四三极管的集电极连接第八电阻的一端和调光芯片的PWM脚，第七电阻的另一端连接第八电阻的另一端和第三电压端。
可选地，所述的稳压供电的调光电源模块中，所述调光电路还包括第九电阻和第三稳压管。
所述第九电阻的一端连接第五电阻的另一端和输出端口的第1脚，第九电阻的另一端连接第三稳压管的负极，第三稳压管的正极连接第六电阻的另一端。
可选地，所述的稳压供电的调光电源模块中，所述调光电路还包括第十电阻、第五电容和第六电容。
所述第十电阻的一端连接第一单片机的ADJ脚和第五电容的一端，第十电阻的另一端连接第五电阻的一端和第六电阻的一端，第五电容的另一端连接调光地，第六电容连接在第一单片机的VDD脚与调光地之间。
可选地，所述的稳压供电的调光电源模块中，所述调光电路还包括第十一电阻、第十二电阻和第十三电阻。
所述第十一电阻连接在第三三极管的基极与第一单片机的PWM脚之间，第十二电阻连接在第三三极管的基极与第三三极管的发射极之间，第十三电阻连接在第三三极管的集电极与第二电压端之间。
可选地，所述的稳压供电的调光电源模块中，所述稳压电路包括第三二极管、第七电容、第八电容、第五三极管、第六三极管、第十四电阻、第十五电阻、第四稳压管和第五稳压管；所述第三二极管的正极连接控制电路；第三二极管的负极连接第七电容的一端、第十四电阻的一端和第五三极管的集电极；第七电容的另一端连接第八电容的一端，第八电容的另一端连接控制电路和调光地，第五三极管的基极连接第十四电阻的另一端和第四稳压管的负极；第五三极管的发射极连接第一电压端、第六三极管的集电极和第十五电阻的一端；第六三极管的发射极连接第二电压端，第六三极管的基极连接第十五电阻的另一端和第五稳压管的负极，第四稳压管的正极和第五稳压管的正极均连接调光地。
本发明实施例第二方面提供了一种LED调光装置，包括LED灯串和调光器，还包括所述的稳压供电的调光电源模块，所述稳压供电的调光电源模块连接LED灯串和调光器。
所述稳压供电的调光电源模块将市电转换为供电电压给LED灯串供电，还生成第二电压并进行稳压处理后给内部的单片机供电；调光器输出调光信号给稳压供电的调光电源模块，所述稳压供电的调光电源模块根据调光信号对LED灯串进行调光。
 有益效果
本发明实施例提供的技术方案中，稳压供电的调光电源模块包括控制电路、稳压电路、调光电路和输出端口；控制电路将市电转换为供电电压并通过输出端口输出给LED灯串供电；稳压电路感应控制电路内部的电压并生成第一电压和第二电压，对第二电压进行稳压处理后输出给调光电路中的单片机供电，输出第一电压来设置调光电路的调压范围；输出端口将调光器输出的调光信号传输给调光电路，调光电路根据调光信号生成对应的脉宽调制信号；控制电路根据脉宽调制信号控制供电电流的大小，通过输出端口输出以对LED灯串进行调光。能输出稳定的第二电压给单片机供电，从而解决现有LED电源模块不能给单片机提供稳定供电的问题；输出的第一电压与现有技术相比留出了余量，使调光电路能实现0~10V的调光。
 附图说明
图1为本发明实施例一中LED调光装置的结构框图。
图2为本发明实施例一中控制电路和输出端口的电路示意图。
图3为本发明实施例一中稳压电路的电路示意图。
图4为本发明实施例一中调光电路的电路示意图。
图5为本发明实施例二中稳压电路的电路示意图。
图6为本发明实施例三中控制电路和输出端口的电路示意图。
图7为本发明实施例四中控制电路和输出端口的电路示意图。
图8为本发明实施例五中控制电路和输出端口的电路示意图。
图9为本发明实施例六中稳压电路和一部分调光电路的电路示意图。
图10为本发明实施例六中另一部分调光电路的电路示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，本发明实施例提供的LED调光装置包括稳压供电的调光电源模块10、LED灯串20和调光器30；所述稳压供电的调光电源模块10连接LED灯串20和调光器30。所述稳压供电的调光电源模块10将市电转换为供电电压（LED±）给LED灯串20供电，还生成第二电压并进行稳压处理后给内部的单片机（根据不同的引脚设置，单片机分为第一单片机和第二单片机）供电；调光器30根据用户操作输出对应的调光信号DIM+给稳压供电的调光电源模块10，所述稳压供电的调光电源模块10根据调光信号DIM+对LED灯串20进行调光。
在实施例一中，如图1所示，所述稳压供电的调光电源模块10包括一电路板，所述电路板上设有控制电路110、稳压电路120、调光电路130和输出端口140；所述控制电路110连接稳压电路120、调光电路130和输出端口140，稳压电路120连接调光电路130，调光电路130连接输出端口140，输出端口140连接LED灯串20和调光器30。所述控制电路110将市电转换为供电电压LED±和第三电压16V，通过输出端口140输出供电电压LED±给LED灯串20供电；所述稳压电路120感应控制电路110内部通断时的电压，生成第一电压12V和第二电压5VCC，对第二电压5VCC进行稳压处理后输出给调光电路130中的单片机供电，输出第一电压12V来设置调光电路的调压范围；所述输出端口140将调光器输出的调光信号DIM+传输给调光电路130，调光电路130根据调光信号DIM+生成对应的脉宽调制信号PWM；控制电路110根据脉宽调制信号PWM控制供电电流的大小，通过输出端口140输出对LED灯串进行调光。
其中，所述控制电路110的电路如图2所示，其为现有技术，此处对其具体电路连接关系不作详述，图2中的A表示飞线。市电输入进行相应处理（如整流、滤波）后传输给型号优选为BP2636C的驱动芯片U1，驱动芯片U1用于实现恒压驱动，输出电压Vout给调光芯片U2供电。型号优选为BP3179F的调光芯片U2是一款适用于反激电路的隔离低PF可调光 LED驱动控制器，支持PWM和模拟调光信号全程模拟调光，调光芯片U2的GATE脚输出对应的信号控制第一开关管QA（可采用NMOS管）的通断状态，变压器（型号优选为EF16或EE16，包括3个绕组，分别是第1绕组T1A、第2绕组T1B和第3绕组T1C）工作，当QA导通时将变压器的第1脚拉低，LED灯串20被点亮。所述调光芯片U2还根据调光电路130输入的脉宽调制信号PWM控制CS脚输出的波形，调整输出电流的大小，从而实现对LED灯串的调光控制（如亮度的明暗控制）。
所述输出端口140是现有常见的端口，各个引脚可自定义，各引脚只起到信号传输的作用，方便连线外接LED灯串和调光器；此处对输出端口的型号不作限定。
实施例一中，请一并参阅图3，由控制电路110组成APFC（有源功率因数校正）和反激分离形式，由于控制电路110输出反激为恒流控制，无恒压功能，无法输出恒压稳定电压。实施例一通过设置稳压电路120来利用控制电路110中变压器的第2绕组T1B上的电压来进行电压转换和稳压处理，以实现稳定地对调光电路130中的第一单片机供电。
所述稳压电路120包括第一二极管D1、第二二极管D2、第一电容C1、第二电容C2、第一三极管Q1、第二三极管Q2、第一电阻R1、第二电阻R2、第一稳压管ZDS1和第二稳压管ZDS2；所述第一二极管D1的正极连接第二二极管D2的负极和变压器的第5脚（即变压器的第2绕组T1B的同名端）；第一二极管D1的负极连接第一电容C1的一端、第一电阻R1的一端和第一三极管Q1的集电极；第一电容C1的另一端连接控制电路中变压器的第6脚（即变压器的第2绕组T1B的异名端）和第二电容C2的一端，第二电容C2的另一端连接第二二极管D2的正极和调光地PGND，第一三极管Q1的基极连接第一电阻R1的另一端和第一稳压管ZDS1的负极；第一三极管Q1的发射极连接第一电压端（提供12V的第一电压12V）、第二三极管Q2的集电极和第二电阻R2的一端；第二三极管Q2的发射极连接第二电压端（输出5V的第二电压5VCC），第二三极管Q2的基极连接第二电阻R2的另一端和第二稳压管ZDS2的负极，第一稳压管ZDS1的正极和第二稳压管ZDS2的正极均连接调光地PGND。
其中，调光地PGND即调光器中的地，调光地PGND连接输出端口的第2脚，通过连接线连接调光器中的地。第二电容C2采用电解电容、规格为33uF/100V的有极性电容；第一稳压管ZDS1是稳压值为12V的稳压二极管，第二稳压管ZDS2是稳压值为5V的稳压二极管。
通过第一二极管D1、第二二极管D2将整个电源开关过程（即QA的通断）中变压器的第2绕组T1B上感应到的电压全部叠加在第一电容C1和第二电容C2上，实现C2上电压的稳定。第一三极管Q1、第一电阻R1和第一稳压管ZDS1组成一组稳压电路，将第二电容C2上的电压钳压稳定在12V，输出第一电压12V。第二三极管Q2、第二电阻R2和第二稳压管ZDS2组成另一组稳压电路，将第二电压端上的第二电压5VCC钳压稳定在5V输出，给调光电路130中的第一单片机稳定供电。
优选地，为了提高给第一单片机供电的稳定性，所述稳压电路120还包括第三电阻R3、第三电容C3和第四电容C4；所述第三电阻R3与第二电容C2并联，第三电容C3的一端连接第一三极管Q1的发射极和第一电压端，第四电容C4的一端连接第二电阻R2的一端，第三电容C3的另一端连接第四电容C4的另一端和调光地PGND。第二电压5VCC是由第一电压12V降压产生的，通过C3和C4的滤波使第一电压12V稳定，即可间接稳定第二电压5VCC；第三电阻R3用于给第一稳压管ZDS1限流。
现有技术中没有稳压电路120，常因为供电不足，只能做1~10V的调光。而本实施例通过稳压电路120输出12V的第一电压，由于12V留出了电压幅值的余量，可以做到从0~10V的调光，即可将调光电路的调压范围设置为0~10V；还能产生稳定的第二电压5VCC给第一单片机供电，解决现有LED电源模块不能给第一单片机提供稳定供电的问题。
实施例一中，请一并参阅图4，所述调光电路130包括第一单片机U3、第一光耦PC1、第三三极管Q3、第四三极管Q4、第四电阻R4、第五电阻R5、第六电阻R6、第七电阻R7和第八电阻R8；所述第一单片机U3的VDD脚连接第二电压端，第一单片机U3的ADJ脚连接第五电阻R5的一端和第六电阻R6的一端，第五电阻R5的另一端连接第四电阻R4的一端和输出端口140的第1脚，第四电阻R4的另一端连接第一电压端，第六电阻R6的另一端和第一单片机U3的GND脚均连接调光地PGND，第一单片机U3的PWM脚连接第三三极管Q3的基极，第三三极管Q3的发射极连接调光地PGND和第一光耦PC1的第2脚，第三三极管Q3的集电极连接第二电压端和第一光耦PC1的第1脚，第一光耦PC1的第3脚连接第四三极管Q4的发射极和地，第一光耦PC1的第4脚连接第四三极管Q4的基极和第七电阻R7的一端，第四三极管Q4的集电极连接第八电阻R8的一端和调光芯片U2的PWM脚，第七电阻R7的另一端连接第八电阻R8的另一端和第三电压端（输出第三电压16V）。
其中，所述第三三极管Q3和第四三极管Q4为NPN三极管，第一单片机U3的型号不限、只要能编程的第一单片机都可以，可根据程序设置第一单片机U2的各个引脚顺序和功能。R4-R6用于实现第一单片机U3对脉宽调制信号PWM的调节控制，R7用于对第一光耦PC1供电，R8用于对脉宽调制信号PWM进行上拉。
当外部输入的调光信号DIM+为高电平时，通过R4-R6分压后输入第一单片机的ADJ脚，第一单片机的PWM脚输出低电平控制第三三极管Q3截止，第一光耦PC1导通，第四三极管Q4截止，脉宽调制信号PWM输出高电平。当调光信号DIM+为低电平时，第一单片机的PWM脚输出高电平控制第三三极管Q3导通，第一光耦PC1截止，第四三极管Q4导通，脉宽调制信号PWM输出低电平。
所述脉宽调制信号PWM传输至调光芯片U2中控制CS脚输出的波形，从而调整输出电流的大小，实现对LED灯串亮度的明暗调节。
优选地，所述调光电路130还包括第九电阻R9和第三稳压管ZDS3，所述第九电阻R9的一端连接第五电阻R5的另一端和输出端口140的第1脚，第九电阻R9的另一端连接第三稳压管ZDS3的负极，第三稳压管ZDS3的正极连接第六电阻R6的另一端。由于第一单片机U3的ADJ脚比较弱，通过第九电阻R9和第三稳压管ZDS3组成的保护电路来保护第一单片机U3的ADJ脚。
优选地，所述调光电路130还包括第十电阻R10、第五电容C5和第六电容C6；所述第十电阻R10的一端连接第一单片机U3的ADJ脚和第五电容C5的一端，第十电阻R10的另一端连接第五电阻R5的一端和第六电阻R6的一端，第五电容C5的另一端连接调光地，第六电容C6连接在第一单片机U3的VDD脚与调光地PGND之间。第十电阻R10用于调节光敏感度的大小，使对调光器的匹配度更好。第五电容C5用于滤除外部敏感信号，第六电容C6用于对输入第一单片机中的第二电压5VCC进行滤波，进一步提高给第一单片机供电的稳定性。
优选地，所述调光电路130还包括第十一电阻R11、第十二电阻R12和第十三电阻R13；所述第十一电阻R11连接在第三三极管Q3的基极与第一单片机U3的PWM脚之间，第十二电阻R12连接在第三三极管Q3的基极与第三三极管Q3的发射极之间，第十三电阻R13连接在第三三极管Q3的集电极与第二电压端之间。由于第一单片机U3的PWM脚输出的信号较弱，通过第十一电阻R11进行驱动来控制第三三极管Q3能更加稳定的通断。第十二电阻R12的下拉作用可在第三三极管Q3不工作时确保其完全截止，第十三电阻R13用于对第三三极管Q3的集电极（也相当于第一光耦的第1脚）供电。
实施例二中，所述控制电路与实施例一中的控制电路110的电路和工作原理相同，如图2所示；实施例二中的调光电路与实施例一中的调光电路130的电路和工作原理相同，如图4所示。
实施例二主要是对稳压电路进行了改进，如图5所示，实施例二中的稳压电路包括第三二极管D3、第七电容C7、第八电容C8、第五三极管Q5、第六三极管Q6、第十四电阻R14、第十五电阻R15、第四稳压管ZDS4和第五稳压管ZDS5；所述第三二极管D3的正极连接变压器的第5脚（即变压器的第2绕组T1B的同名端）；第三二极管D3的负极连接第七电容C7的一端、第十四电阻R14的一端和第五三极管Q5的集电极；第七电容C7的另一端连接第八电容C8的一端，第八电容C8的另一端连接变压器的第6脚（即变压器的第2绕组T1B的异名端）和调光地PGND，第五三极管Q5的基极连接第十四电阻R14的另一端和第四稳压管ZDS4的负极；第五三极管Q5的发射极连接第一电压端（提供12V的第一电压12V）、第六三极管Q6的集电极和第十五电阻R15的一端；第六三极管Q6的发射极连接第二电压端（输出5V的第二电压5VCC），第六三极管Q6的基极连接第十五电阻R15的另一端和第五稳压管ZDS5的负极，第四稳压管ZDS4的正极和第五稳压管ZDS5的正极均连接调光地PGND。
通过第三二极管D3将整个电源开关过程（即QA的通断）中变压器的第2绕组T1B上感应到的电压全部叠加在第七电容C7和第八电容C8上，实现C8上电压的稳定。Q5、R14和ZDS4组成一组稳压电路，将C8上的电压钳压稳定在12V，输出第一电压12V。Q6、R15和ZDS5组成另一组稳压电路，将第二电压端上的第二电压5VCC钳压稳定在5V输出，给调光电路130中的第一单片机稳定供电。
优选地，为了提高给第一单片机供电的稳定性，在实施例二中，所述稳压电路还包括第十六电阻R16、第九电容C9和第十电容C10；所述第十六电阻R16与第八电容C8并联，第九电容C9的一端连接第五三极管Q5的发射极和第一电压端，第十电容C10的一端连接第十五电阻R15的一端，第九电容C9的另一端连接第十电容C10的另一端和调光地GND。第二电压5VCC是由第一电压12V降压产生的，通过C9和C10的滤波使第一电压12V稳定，即可间接稳定第二电压5VCC；第十六电阻R16用于给第一稳压管ZDS1限流。
为保证隔离，需要保证安全距离以及耐压标准，则在实施例二中，变压器的第5脚上使用三层绝缘线，以保证变压器的第2绕组T1B与整个电源原边之间有足够的距离。
需要理解的是，稳压供电的调光电源模块中，本发明实施例主要是对稳压电路进行改进，且稳压电路能与不同功能的控制电路搭配使用，来实现对调光电路中第一单片机的稳定供电，具体如实施例三至五所示。
实施例三中，控制电路可替换为图6所示的APFC（有源功率因数校正）+BUCK（降压电路拓扑）电路，利用APFC输出恒压的特点，稳定给需要恒压输出的第一单片机供电；其是在实施例二的基础上进行的变形，与实施例二的区别在于，变压器的第一绕组T1A以及其外围电路不同（如图6中虚线框所示，实施例三中没有使用变压器的第3脚和第4脚，因此图中无示出），具体如图6所示，其他电路结构相同（相同部分中各个器件的名称与实施例二相同，表示其为相同的器件），此为现有技术，此处对其电路连接不作详述。实施例三中的稳压电路可采用实施例二中的稳压电路，为节省成本可用连接线替换第七电容C7，其余电路不变。实施例三中的调光电路与图4所示的实施例二中的调光电路相同。
实施例四中，控制电路可替换为图7所示的恒流单级低PF（功率因素）隔离电路，其是在实施例一的基础上进行的变形，其与实施例一的区别在于，去掉了驱动芯片U1及其外围电路，其他电路结构相同（相同部分中各个器件的名称与实施例一相同，表示其为相同的器件），此为现有技术，此处对其电路连接不作详述。由于实施例四中的控制电路只能做1~10V调光，因此实施例四中的稳压电路可采用图3所示的实施例一中的稳压电路来进行电压叠加并输出12V的第一电压12V，以留出余量实现0~10V的调光。实施例四中的调光电路与图4所示的实施例一中的调光电路相同。
实施例五中，控制电路可替换为图8所示的恒流单级低PF（功率因素）非隔离电路，其是在实施例一的基础上进行的变形，其与实施例一的区别在于，去掉了驱动芯片U1及其外围电路，变压器的第一绕组T1A以及其外围电路不同（没有使用变压器的第3脚和第4脚，因此图中无示出），其他电路结构相同（相同部分中各个器件的名称与实施例一相同，表示其为相同的器件），此为现有技术，此处对其电路连接不作详述。由于实施例五中的控制电路只能做1~10V调光，因此实施例五中的稳压电路可采用图3所示的实施例一中的稳压电路来进行电压叠加并输出12V的第一电压12V，以留出余量实现0~10V的调光。实施例五中的调光电路与图4所示的实施例一中的调光电路相同。
实施例六中，主要是对稳压电路和调光电路进行改进，控制电路可采用图1、图6、图7或图8中的任意一种，只要设有调光芯片U2的控制电路都适用。
请一并参阅图9，在实施例六中，所述稳压电路（此处用标号120_1/来表示）包括稳压器U4、第四二极管D4、第五二极管D5、第七三极管Q7、第十七电阻R17、第十八电阻R18、第十一电容C11和第十二电容C12；所述第四二极管D4的正极连接变压器的第4脚（即变压器的第2绕组T1B的异名端）；第四二极管D4的负极连接第七三极管Q7的集电极、第十一电容C11的一端、第十七电阻R17的一端和第十八电阻R18的一端；第七三极管Q7的基极连接第五二极管D5的负极和第十八电阻R18的另一端，第五二极管D5的正极连接第十一电容C11的另一端、第十七电阻R17的另一端、变压器的第3脚（即变压器的第2绕组T1B的同名端）和调光地PGND；稳压器U4的OUT脚（即输出脚）连接第七三极管Q7的发射极、第十二电容C12的一端和调光电路（实施例六）；稳压器U4的IN脚（输入脚）连接调光电路（实施例六），稳压器U4的GND脚（地脚）连接调光地PGND，第十二电容C12的另一端连接调光电路（实施例六）。
其中，所述稳压器U4的型号优选为78L05。通过第四二极管D4将变压器的第2绕组T1B上感应到的电压全部叠加在第十一电容C11上，实现C11上电压的稳定。第七三极管Q7用于线性稳压，将第十一电容C11上的电压钳压稳定在12V，输出第一电压12V，为调光信号DIM+提供上拉的高电平。稳压器U4根据第一电压输出第二电压5VCC，并稳定在5V输出，给调光电路中的第二单片机稳定供电。
请一并参阅图9和图10，在实施例六中，所述调光电路包括第二单片机U5、第二光耦PC2、第六稳压管ZDS6、第八三极管Q8、第九三极管Q9、第十三极管Q10、第十一三极管Q11、第二开关管Qb、第六二极管D6、第十九电阻R19和第二十电阻R20；所述第二单片机U5的VDD脚连接稳压器U4的IN脚、第二光耦PC2的第1脚和第八三极管Q8的集电极；第二单片机U5的GND脚连接调光地PGND、第八三极管Q8的发射极和第二光耦PC2的第2脚；第二单片机U5的PWM脚连接第八三极管Q8的基极，第二单片机U5的ADJ脚连接第十九电阻R19的一端和第二十电阻R20的一端，第十九电阻R19的另一端连接稳压器U4的OUT脚和输出端口140的第1脚（传输调光信号DIM+），第二十电阻R20的另一端连接调光地PGND，第二单片机U5的SW脚连接第二单片机U5的VDD脚，第二光耦PC2的第3脚连接第九三极管Q9的发射极、第十三极管Q10的发射极和地；第二光耦PC2的第4脚连接第九三极管Q9的基极、第九三极管Q9的集电极和第十一极管Q11的发射极；第十三极管Q10的基极连接第九三极管Q9的集电极、第十三极管Q10的集电极、第六二极管D6的正极和电源控制芯片U1的DIM脚（传输脉宽调制信号PWM）；第六二极管D6的负极连接第二开关管Qb的栅极、第二开关管Qb的源极和地；第十一极管Q11的基极连接第十一极管Q11的集电极、第六稳压管ZDS6的负极和电源端（由调光芯片U2的VCC脚提供的第三电压16V）；第六稳压管ZDS6的正极连接第二开关管Qb的源极和地，第二开关管Qb的漏极连接调光芯片U2的FB脚。
其中，所述第二单片机U5的型号不限、只要能编程的单片机都可以，可根据程序设置第二单片机U5的各个引脚顺序和功能。R19和R20用于实现第二单片机U5对脉宽调制信号PWM的调节控制。第九三极管Q9和第十三极管Q10用于对脉宽调制信号PWM进行放大后再传输至调光芯片U2的DIM脚。第十一极管Q11是线性稳压，由于其基极和发射极均被16V的第三电压上拉为高电平，Q11保持导通，第三电压16V从Q11的发射极输出。第二开关管Qb是OVP管。
当调光信号DIM+为高电平时通过R19和R20分压后输入第二单片机的ADJ脚，第二单片机的PWM脚输出高电平控制第八三极管Q8导通，第二光耦PC2截止，第九三极管Q9的基极被第三电压16V上拉而导通，将第十三极管Q10的基极下拉为低电平，脉宽调制信号PWM输出高电平（被第三电压16V上拉）。当调光信号DIM+为低电平时，第二单片机的PWM脚输出低电平控制第八三极管Q8截止，第二光耦PC2导通，第九三极管Q9的基极被下拉而截止，第十三极管Q10的基极被第三电压16V上拉而导通，脉宽调制信号PWM输出低电平（被Q10下拉）。这样当调光信号DIM+为周期高低电平变化的信号时，即可输出对应的脉宽调制信号PWM。所述脉宽调制信号PWM传输至调光芯片U2中控制CS脚输出的波形，从而调整输出电流的大小，实现对LED灯串亮度的明暗调节。
当脉宽调制信号PWM为高电平时，通过第六二极管D6（单向导通）控制第二开关管Qb导通；当脉宽调制信号PWM为低电平时，由于第二开关管Qb的栅极接地而截止。这样在调光低端跟输出空载时，通过第二开关管Qb来控制输出的最大电压。同时，通过第三电压16V来提供高电平，可以保证变压器先输出第三电压16V后再生成脉宽调制信号PWM，以保证电源不会出现开机闪的问题。
优选地，所述调光电路还包括第七稳压管ZDS7、第十三电容C13、第十四电容C14、第二十一电阻R21、第二十二电阻R22和第二十三电阻R23；所述第七稳压管ZDS7的正极连接调光地，第七稳压管ZDS7的负极通过第二十一电阻R21连接第二十二电阻R22的一端和第十三电容C13的一端，第二十二电阻R22的另一端连接稳压器U4的OUT脚，第十三电容C13的另一端连接调光地，第二十三电阻R23的一端连接第十九电阻R19的一端和第二十电阻R20的一端，第二十三电阻R23的另一端连接第二单片机U5的ADJ脚和第十四电容C14的一端，第十四电容C14的另一端连接调光地。
其中，第七稳压管ZDS7和第二十一电阻R21用于对调光信号DIM+进行稳压，第二十二电阻R22和第十三电容C13用于对调光信号DIM+进行滤波限流。第二十三电阻R23和第十四电容C14用于对调光信号DIM+的分压电压进行滤波。
优选地，所述调光电路还包括第十五电容C15、第二十四电阻R24、第二十五电阻R25和第二十六电阻R26；所述第十五电容C15的一端连接第二单片机U5的VDD脚、第二十四电阻R24的一端和稳压器U4的IN脚；第十五电容C15的另一端连接调光地和第二光耦PC2的第2脚，第二十四电阻R24的另一端连接第二单片机U5的SW脚，第二十五电阻R25的一端连接第二单片机U5的PWM脚，第二十五电阻R25的另一端连接第八三极管Q8的基极，第二十六电阻R26的一端连接稳压器U4的IN脚，第二十六电阻R26的另一端连接第二光耦PC2的第1脚和第八三极管Q8的集电极。
其中，第十五电容C15用于对第二电压5VCC滤波，使第二单片机的工作更加稳定。第二十四电阻R24用于保护SW脚，第二十五电阻R25用于保护第八三极管Q8（避免突变高压烧坏Q8），第二十六电阻R26用于保护第二光耦PC2（避免第二电压5VCC过高烧坏PC2，还能对PC2稳定供电）。
优选地，所述调光电路还包括第十六电容C16、第十七电容C17、第二十七电阻R27、第二十八电阻R28、第二十九电阻R29、第三十电阻R30和第三十一电阻R31；所述第十六电容C16的一端连接第二光耦PC2的第4脚、第二十七电阻R27的一端和第二十九电阻R29的一端；第十六电容C16的另一端连接第二光耦PC2的第3脚、第二十八电阻R28的一端和地；第二十七电阻R27的另一端连接第二十八电阻R28的另一端和第九三极管Q9的基极；第二十九电阻R29的另一端连接第十一三极管Q11的发射极、第三十电阻R30的一端和第三十一电阻R31的一端；第三十电阻R30的另一端连接第九三极管Q9的集电极，第三十一电阻R31的另一端连接第十三极管Q10的集电极，第十七电容C17的一端连接第九三极管Q9的发射极和地，第十七电容C17的另一端连接第六二极管D6的负极。
其中，C16、R27、R28用于对Q9的基极电压滤波。R29用于对Q9的基极电压进行上拉，R30用于对Q10的基极电压进行上拉，R31用于对输出的脉宽调制信号PWM进行限流。
优选地，所述调光电路还包括第七二极管D7、第十八电容C18、第十九电容C19、第三十二电阻R32、第三十三电阻R33、第三十四电阻R34和第三十五电阻R35；所述第七二极管D7的正极连接第十一三极管Q11的发射极和第十八电容C18的一端，第七二极管D7的负极连接第十一三极管Q11的集电极和第三十二电阻R32的一端，第十八电容C18的另一端连接第二光耦PC2的第3脚和地，第三十二电阻R32的另一端连接十一三极管Q11的基极，第三十三电阻R33的一端连接第二开关管Qb的栅极和第六二极管D6的负极，第三十三电阻R33的另一端连接第二开关管Qb的源极、第三十五电阻R35的一端和地；第三十四电阻R34的一端连接第二开关管Qb的漏极，第三十四电阻R34的另一端连接第十九电容C19的一端和第三十五电阻R35的另一端，第十九电容C19的另一端连接第六稳压管ZDS6的正极、第三十五电阻R35的一端和地。
其中，第十八电容C18用于对Q11输出的第三电压16V进行滤波。R34、R35和C19用于保护Qb。
在具体实施时，还可在所述调光电路中设置拨码器SW，根据用户的拨码操作输出对应的调节信号DIM+。
综上所述，本发明提供的稳压供电的调光电源模块及LED调光装置，既能输出稳定的恒压给单片机供电，又能实现输出可调节功率的无闪烁功能，保证调光正常，稳压电路的结构简单，与现有技术相比可去掉恒压模块和相应芯片，降低成本并缩小稳压供电的调光电源模块的体积。
以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (9)

  1. 一种稳压供电的调光电源模块，连接LED灯串和调光器，其特征在于，包括控制电路、稳压电路、调光电路和输出端口，所述控制电路连接稳压电路、调光电路和输出端口，调光电路连接稳压电路和输出端口，输出端口连接LED灯串和调光器；
    所述控制电路将市电转换为供电电压并通过输出端口输出给LED灯串供电；
    所述稳压电路感应控制电路内部的电压并生成第一电压和第二电压，对第二电压进行稳压处理后输出给调光电路中的单片机供电，输出第一电压来设置调光电路的调压范围；
    所述输出端口将调光器输出的调光信号传输给调光电路，所述调光电路根据调光信号生成对应的脉宽调制信号；
    所述控制电路根据脉宽调制信号控制供电电流的大小，通过输出端口输出以对LED灯串进行调光。
  2. 根据权利要求1所述的稳压供电的调光电源模块，其特征在于，所述稳压电路包括第一二极管、第二二极管、第一电容、第二电容、第一三极管、第二三极管、第一电阻、第二电阻、第一稳压管和第二稳压管；
    所述第一二极管的正极连接第二二极管的负极和控制电路；第一二极管的负极连接第一电容的一端、第一电阻的一端和第一三极管的集电极；第一电容的另一端连接控制电路和第二电容的一端，第二电容的另一端连接第二二极管的正极和调光地，第一三极管的基极连接第一电阻的另一端和第一稳压管的负极；第一三极管的发射极连接第一电压端、第二三极管的集电极和第二电阻的一端；第二三极管的发射极连接第二电压端，第二三极管的基极连接第二电阻的另一端和第二稳压管的负极，第一稳压管的正极和第二稳压管的正极均连接调光地。
  3. 根据权利要求2所述的稳压供电的调光电源模块，其特征在于，所述稳压电路还包括第三电阻、第三电容和第四电容；
    所述第三电阻与第二电容并联，第三电容的一端连接第一三极管的发射极和第一电压端，第四电容的一端连接第二电阻的一端，第三电容的另一端连接第四电容的另一端和调光地。
  4. 根据权利要求2所述的稳压供电的调光电源模块，其特征在于，所述调光电路包括第一单片机、第一光耦、第三三极管、第四三极管、第四电阻、第五电阻、第六电阻、第七电阻和第八电阻；
    所述第一单片机的VDD脚连接第二电压端，第一单片机的ADJ脚连接第五电阻的一端和第六电阻的一端，第五电阻的另一端连接第四电阻的一端和输出端口的第1脚，第四电阻的另一端连接第一电压端，第六电阻的另一端和第一单片机的GND脚均连接调光地，第一单片机的PWM脚连接第三三极管的基极，第三三极管的发射极连接调光地和第一光耦的第2脚，第三三极管的集电极连接第二电压端和第一光耦的第1脚，第一光耦的第3脚连接第四三极管的发射极和地，第一光耦的第4脚连接第四三极管的基极和第七电阻的一端，第四三极管的集电极连接第八电阻的一端和调光芯片的PWM脚，第七电阻的另一端连接第八电阻的另一端和第三电压端。
  5. 根据权利要求4所述的稳压供电的调光电源模块，其特征在于，所述调光电路还包括第九电阻和第三稳压管；
    所述第九电阻的一端连接第五电阻的另一端和输出端口的第1脚，第九电阻的另一端连接第三稳压管的负极，第三稳压管的正极连接第六电阻的另一端。
  6. 根据权利要求4所述的稳压供电的调光电源模块，其特征在于，所述调光电路还包括第十电阻、第五电容和第六电容；
    所述第十电阻的一端连接第一单片机的ADJ脚和第五电容的一端，第十电阻的另一端连接第五电阻的一端和第六电阻的一端，第五电容的另一端连接调光地，第六电容连接在第一单片机的VDD脚与调光地之间。
  7. 根据权利要求4所述的稳压供电的调光电源模块，其特征在于，所述调光电路还包括第十一电阻、第十二电阻和第十三电阻；
    所述第十一电阻连接在第三三极管的基极与第一单片机的PWM脚之间，第十二电阻连接在第三三极管的基极与第三三极管的发射极之间，第十三电阻连接在第三三极管的集电极与第二电压端之间。
  8. 根据权利要求1所述的稳压供电的调光电源模块，其特征在于，所述稳压电路包括第三二极管、第七电容、第八电容、第五三极管、第六三极管、第十四电阻、第十五电阻、第四稳压管和第五稳压管；所述第三二极管的正极连接控制电路；第三二极管的负极连接第七电容的一端、第十四电阻的一端和第五三极管的集电极；第七电容的另一端连接第八电容的一端，第八电容的另一端连接控制电路和调光地，第五三极管的基极连接第十四电阻的另一端和第四稳压管的负极；第五三极管的发射极连接第一电压端、第六三极管的集电极和第十五电阻的一端；第六三极管的发射极连接第二电压端，第六三极管的基极连接第十五电阻的另一端和第五稳压管的负极，第四稳压管的正极和第五稳压管的正极均连接调光地。
  9. 一种LED调光装置，包括LED灯串和调光器，其特征在于，还包括如权利要求1-8任一项所述的稳压供电的调光电源模块，所述稳压供电的调光电源模块连接LED灯串和调光器；
    所述稳压供电的调光电源模块将市电转换为供电电压给LED灯串供电，还生成第二电压并进行稳压处理后给内部的单片机供电；调光器输出调光信号给稳压供电的调光电源模块，所述稳压供电的调光电源模块根据调光信号对LED灯串进行调光。
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