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CN213907002U - High-power LED driving power supply resonance control device under critical continuity - Google Patents

High-power LED driving power supply resonance control device under critical continuity Download PDF

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CN213907002U
CN213907002U CN202022692467.0U CN202022692467U CN213907002U CN 213907002 U CN213907002 U CN 213907002U CN 202022692467 U CN202022692467 U CN 202022692467U CN 213907002 U CN213907002 U CN 213907002U
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pin
output
capacitor
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郑则炯
黄鹏
王芳楷
郑炜杰
李绍坤
李阳
潘坎福
周坤苗
刘剑成
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Guangdong Industry Technical College
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Abstract

本实用新型公开了一种临界连续下高功率LED驱动电源谐振控制装置,包括输入滤波整流单元、PFC控制器单元、谐波半桥变换器单元、反馈控制单元和输出滤波单元；输入滤波整流单元用于将市电输入的交流电转换为直流电；PFC控制器单元用于调整LED驱动电源谐振部分的频率变化值；谐波半桥变换器单元用于调整电压增益，确保开关管实现零电压开关；反馈控制单元用于提高LED驱动电源的稳定性，提升LED驱动电源谐振控制效率；输出滤波单元用于将谐波半桥变换器单元输出的直流电源进行滤波，输出恒定电流驱动LED；其效果是：使得LED驱动电源开关管实现零电压开关，实现临界连续模式下高功率LED驱动电源谐振控制的目的，提高LED工作效率和寿命。

Figure 202022692467

The utility model discloses a high-power LED driving power supply resonance control device under critical continuity, comprising an input filter rectifier unit, a PFC controller unit, a harmonic half-bridge converter unit, a feedback control unit and an output filter unit; an input filter rectifier unit; It is used to convert the alternating current input from the mains into direct current; the PFC controller unit is used to adjust the frequency change value of the resonant part of the LED drive power supply; the harmonic half-bridge converter unit is used to adjust the voltage gain to ensure that the switch tube realizes zero-voltage switching; The feedback control unit is used to improve the stability of the LED drive power supply and improve the resonance control efficiency of the LED drive power supply; the output filter unit is used to filter the DC power output from the harmonic half-bridge converter unit and output a constant current to drive the LED; the effect is : Make the LED drive power switch tube realize zero-voltage switching, realize the purpose of high-power LED drive power resonance control in critical continuous mode, and improve the working efficiency and life of the LED.

Figure 202022692467

Description

High-power LED driving power supply resonance control device under critical continuity
Technical Field
The utility model belongs to the technical field of the LED, concretely relates to critical continuous low high power LED drive power supply resonance control device.
Background
The illumination becomes an indispensable part of human daily life, and the LED illuminating lamp gradually replaces the traditional incandescent lamp illumination because of the advantages of long service life, energy conservation, environmental protection, high response speed and the like.
However, in recent years, people have not satisfied the response speed and switching loss of the hard switch such as the conventional LED lighting standard switch or the dual switch, and have conducted new research and research on the problems of the driving power source such as switching noise and low power density, and a new technology is tried to replace the conventional hard switching mode, so as to reduce the switching loss of the LED driving power source caused by the driving switch, and realize the switching control of the high-power LED driving power source with zero voltage and zero current, so as to improve the LED lighting efficiency.
Disclosure of Invention
In order to solve the problem, the utility model provides a critical continuous low high power LED drive power supply resonance control device. The LED driving power supply has the advantages of high efficiency and low requirement on working conditions of the parallel resonant converter by combining the LLC resonant converter and the series resonant converter, and the aim of controlling the zero-voltage and zero-current switch of the LED driving power supply is fulfilled under the conditions of full voltage and full load.
The utility model discloses the technical scheme who takes does: a high-power LED driving power supply resonance control device under critical continuity is used for solving the problems of circuit control harmonic abnormality, output current overshoot, poor voltage stability control effect, time delay and the like in a traditional LED driving power supply resonance control method. The device comprises an input filtering rectification unit, a PFC controller unit, a harmonic half-bridge converter unit, a feedback control unit and an output filtering unit;
the input filtering rectification unit is used for converting alternating current input by commercial power into direct current;
the PFC controller unit is used for adjusting the frequency change value of the resonant part of the LED driving power supply and has the functions of controlling harmonic waves and adjusting voltage;
the harmonic half-bridge converter unit is used for adjusting voltage gain and ensuring that a switching tube realizes zero-voltage switching;
the feedback control unit is used for improving the stability of the LED driving power supply and improving the resonance control efficiency of the LED driving power supply;
the output filtering unit is used for filtering the direct-current power supply output by the harmonic half-bridge converter unit and outputting constant current to drive the LED;
the input filtering rectification unit comprises a protective tube F1/RT1, a voltage dependent resistor MOV1/MOV2/MOV3, a resistor R20/R21/R22, a common mode choke LC1/LC2, a differential mode ferrite magnetic core L1, a rectification chip DB1 and a capacitor C1/C2/C10/C11/C12/CY1/CY 2;
the input end of the fuse tube F1/RT1 is respectively connected with an external alternating current power supply fire wire and a zero wire; the voltage dependent resistor MOV3 is connected in parallel with the output end of the fuse F1/RT 1; the differential mode capacitor C12 is connected in parallel with the piezoresistor MOV 3; the input end of the common mode choke LC2 is connected in parallel with the differential mode capacitor C12, and the output end of the common mode choke LC2 is connected in parallel with the differential mode capacitor C11; the resistors R20/R21/R22 are connected in series and then connected in parallel with the differential mode capacitor C11 and the common mode choke LC 1; the output end of the common mode choke LC1 is connected in parallel with the differential mode capacitor C10; the input end of the rectifying chip DB1 is connected in parallel with the differential mode capacitor C10, and the output end of the rectifying chip DB1 is connected with a differential mode interference suppression circuit formed by the ferrite core L1 and the differential mode capacitor C1/C2; the voltage dependent resistor MOV1/MOV2 and the ceramic gas discharge tube form lightning protection and are connected in parallel with the differential mode capacitor C10;
the PFC controller unit comprises resistors (R1-R8, R20-R25, R28-R29, R37, R41-R42, R46, R51-R52, R56-R58, R60, R62-R66), capacitors (C1-C5, C10-C13, C17, C19-C22, C24, C26, C35-C36), diodes (D1-D4, D7-D8), MOS (Q1, Q9-Q10), a zener diode Z1, triodes (Q2-Q3, Q5-Q6), an L6562 chip and a boost inductor L2;
the output end of the ferrite magnetic core L1 is connected with a pin 8 (VCC) power supply VCC end of the L6562 chip through a resistor R4, a MOS tube Q1 and a resistor R25;
the base electrode of the MOS transistor Q1 is connected with the collector electrode of an NPN triode Q3 and is intersected with a voltage limiting circuit consisting of a resistor R5, a resistor R6, a diode D3 and a voltage stabilizing diode Z1; the emitting electrode of the triode Q3 is directly grounded, and the base electrode is connected with a resistor R29 in series and is connected with a power supply VCC;
the output end of the ferrite magnetic core L1 is connected with the input end of a 3-pin (MULT) multiplier of the L6562 chip after voltage division through a series resistor R1, a resistor R2, a resistor R3 and a resistor R24;
the capacitor C26 is connected in series with the resistor R23 and connected in parallel with the capacitor C22 and then is connected between the output end of a 2-pin (COMP) error amplifier of the L6562 chip and the inverting input end of a 1-pin (INV) error amplifier of the L6562 chip;
the base electrode of the PNP triode Q5 is connected with the input end of a 3-pin (MULT) multiplier of the L6562 chip, the emitter electrode is connected with the demagnetization detection input end of a 5-pin (ZCD) boost inductor of the L6562 chip through a resistor R37, and the collector electrode is connected with the collector electrode of the PNP triode Q6;
the cathode of D2 is used as the output of the PFC controller unit; the diode D7 is connected with the resistor R56 in series and then connects the demagnetization detection input end of a 5-pin (ZCD) boost inductor of the L6562 chip with the drive output of a 7-pin (GD) gate;
the 7-pin (GD) grid driving output end of the L6562 chip is connected with a resistor R58 in series and then respectively connected with an NPN triode Q2 base electrode and a PNP triode Q6 base electrode to form two reverse parallel circuits and drive a MOS tube Q9/Q10 to be alternately conducted, the drain electrode of the MOS tube Q9/Q10 is connected with the anode of the diode D2, and the source electrode of the MOS tube Q9/Q10 is respectively connected with the input end of a 4-pin (CS) PWM comparator of the L6562 chip through the resistor R60;
the input end of the Boost inductor L2 is connected with the output end of the ferrite core L1, and the output end of the Boost inductor L2 is respectively connected with the drain electrode of the MOS transistor Q9/Q10 and the anode of the diode D2 to form a Boost circuit of the PFC controller unit;
the harmonic half-bridge converter unit comprises resistors (R70-R76, R10-R12, R14-R19), capacitors (C41-C53), diodes (D5, D9-D10), a transformer T and an FSFR2100 chip;
the power supply end of a 7-pin (LVcc) chip of the FSFR2100 chip is directly connected to a direct current power supply filtered by the capacitor C45;
one path of a 3-pin (RT) switching frequency control end of the FSFR2100 chip returns to a 2-pin (AR) protection control end through a resistor R70 and a resistor R73, the other path of the switching frequency control end is directly connected in series through a resistor R72 and a capacitor C41, is connected with the resistor R71 in parallel and then is grounded, and the capacitor C42 plays a role in filtering;
the current detection end of a 4-pin (CS) low-end MOSFET and the control ground end of a 5-pin (SG) of the FSFR2100 chip are connected through a resistor R74 and a resistor R75, and the power ground end of a 6-Pin (PG) is connected with the control ground end of the 5-pin (SG) and then grounded;
the driving end of the 8-pin (HVcc) high-side MOSFET of the FSFR2100 chip is driven by a direct-current power supply through a resistor R76 and a diode D5, and the driving end of the 8-pin (HVcc) high-side MOSFET of the FSFR2100 chip is connected with the driving end of the 9-pin (VCTR) low-side MOSFET of the FSFR2100 chip through a capacitor C48;
the capacitor C47, a main side coil of the transformer T and the resistor R12 are connected in series and then connected between a 1 pin (VDL) of the FSFR2100 chip and a 9 pin (VCTR) low-side MOSFET driving end of the FSFR2100 chip;
the secondary coil of the transformer T is connected with the output filtering unit;
the feedback control unit comprises a photoelectric isolator PC817, a shunt regulator d431, a resistor R14, a resistor R15, a resistor R17 and a resistor R18;
the resistor R10 is connected with the resistor R14 in series and then is connected with the anode of the light emitting diode in the photoelectric coupler PC 817;
the cathode of the light emitting diode in the photoelectric coupler PC817 is connected with the shunt regulator d 431;
the resistor R15 is connected with a light emitting diode in the photoelectric coupler PC817 in parallel;
an emitter in the photoelectric coupler PC817 is directly grounded;
a collector in the photoelectric coupler PC817 is connected with a 2-pin (AR) protection control end of the FSFR2100 chip through a resistor R73, and the capacitors C43 and C44 play a role in filtering;
the output end of the resistor R10 is connected to the reference input end of a shunt regulator d431 after being subjected to voltage division through a resistor R17 and a resistor R18, the cathode of the d431 is connected with the cathode of a light-emitting diode in the photoelectric coupler PC817, and the anode of the d431 is directly grounded;
the output filtering unit comprises a diode D9, a diode D10, a resistor R10, a resistor R11, an output capacitor C49 and an output capacitor C50;
the diode D9 returns to the upper half secondary coil through the resistor R10, the output capacitor C49 and the output capacitor C50 after coming out from the same-name end lead of the upper half secondary coil of the transformer T;
the diode D10 is led out from the lower half secondary coil of the transformer T and returns to the dotted end of the lower half secondary coil through the resistor R11, the output capacitor C49 and the output capacitor C50;
by adopting the technical scheme, the method has the following advantages: the utility model provides a critical continuous low high power LED drive power supply resonance control device realizes independently regulation and control and zero voltage switch of high power LED drive power supply resonant frequency to reduce switching loss's purpose, improved LED drive power supply's working property.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a circuit diagram of the rectifying, filtering and PFC controller of the present invention;
FIG. 3 is a circuit diagram of the input/output part of the resonant converting unit of the present invention;
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments, which are used for illustrating the present invention but are not used for limiting the scope of the present invention.
As shown in fig. 1, the utility model provides a critical continuous low high power LED drive power supply resonance control device for improve circuit control harmonic that appears in traditional LED drive power supply adopts the resonance control method unusual, output current overshoots, voltage stability control effect is poor, time delay scheduling problem. The device comprises an input filtering rectification unit, a PFC controller unit, a harmonic half-bridge converter unit, a feedback control unit and an output filtering unit;
the input filtering rectification unit is used for converting alternating current input by commercial power into direct current;
the PFC controller unit is used for adjusting the frequency change value of the resonant part of the LED driving power supply and has the functions of controlling harmonic waves and adjusting voltage;
the harmonic half-bridge converter unit is used for adjusting voltage gain and ensuring that a switching tube realizes zero-voltage switching;
the feedback control unit is used for improving the stability of the LED driving power supply and improving the resonance control efficiency of the LED driving power supply;
the output filtering unit is used for filtering the direct-current power supply output by the harmonic half-bridge converter unit and outputting constant current to drive the LED;
as shown in fig. 2, the input filter rectifying unit comprises a fuse F1/RT1, a voltage dependent resistor MOV1/MOV2/MO V3, a resistor R20/R21/R22, a common mode choke LC1/LC2, a differential mode ferrite core L1, a rectifying chip DB1 and a capacitor C1/C2/C10/C11/C12/CY1/CY 2; the input end of the fuse tube F1/RT1 is respectively connected with an external alternating current power supply fire wire and a zero wire; the voltage dependent resistor MOV3 is connected in parallel with the output end of the fuse F1/RT 1; the differential mode capacitor C12 is connected in parallel with the piezoresistor MOV 3; the input end of the common mode choke LC2 is connected in parallel with the differential mode capacitor C12, and the output end of the common mode choke LC2 is connected in parallel with the differential mode capacitor C11; the resistors R20/R21/R22 are connected in series and then connected in parallel with the differential mode capacitor C11 and the common mode choke LC 1; the output end of the common mode choke LC1 is connected in parallel with the differential mode capacitor C10; the input end of the rectifying chip DB1 is connected in parallel with the differential mode capacitor C10, and the output end of the rectifying chip DB1 is connected with a differential mode interference suppression circuit formed by the ferrite core L1 and the differential mode capacitor C1/C2; the voltage dependent resistor MOV1/MOV2 and the ceramic gas discharge tube form lightning protection and are connected in parallel with the differential mode capacitor C10.
Further, the PFC controller adopted by the design selects an L6562 chip, which is an active power factor correction control chip. The pin ZCD of the chip has a high clamping voltage V insideZCD_cAnd a low trigger voltage VZCD_t。
Referring to fig. 2, the working principle of the chip is as follows: when the level of the pin GD of the chip is changed from low to high, the diode D7 starts to conduct, the capacitor C24 is rapidly charged through the resistor R57, and the voltage of the capacitor C24 rises to the clamping voltage V of the pin ZCDZCD_cWill be clamped; when the pin GD outputs a low level, the diode is turned off, and the capacitor C24 discharges through the resistor R57 until the capacitor voltage drops to the trigger voltage V of the pin ZCDZCD_tThe output level of pin GD goes from low to high, and the next cycle starts.
In order to adjust driving power supply harmonic waves and adjust voltage, the PFC controller unit comprises resistors (R1-R8, R20-R25, R28-R29, R37, R41-R42, R46, R51-R52, R56-R58, R60, R62-R66), capacitors (C1-C5, C10-C13, C17, C19-C22, C24, C26, C35-C36), diodes (D1-D4, D7-D8), MOS tubes (Q1, Q9-Q10), a zener diode Z1, triodes (Q2-Q3, Q5-Q6), L6562 chips and a boosting inductor L2;
the output end of the ferrite magnetic core L1 is connected with a pin 8 (VCC) power supply VCC end of the L6562 chip through a resistor R4, a MOS tube Q1 and a resistor R25;
the base electrode of the MOS transistor Q1 is connected with the collector electrode of an NPN triode Q3 and is intersected with a voltage limiting circuit consisting of a resistor R5, a resistor R6, a diode D3 and a voltage stabilizing diode Z1; the emitting electrode of the triode Q3 is directly grounded, and the base electrode is connected with a resistor R29 in series and is connected with a power supply VCC;
the output end of the ferrite magnetic core L1 is connected with the input end of a 3-pin (MULT) multiplier of the L6562 chip after voltage division through a series resistor R1, a resistor R2, a resistor R3 and a resistor R24;
the capacitor C26 is connected in series with the resistor R23 and connected in parallel with the capacitor C22 and then is connected between the output end of a 2-pin (COMP) error amplifier of the L6562 chip and the inverting input end of a 1-pin (INV) error amplifier of the L6562 chip;
the base electrode of the PNP triode Q5 is connected with the input end of a 3-pin (MULT) multiplier of the L6562 chip, the emitter electrode is connected with the demagnetization detection input end of a 5-pin (ZCD) boost inductor of the L6562 chip through a resistor R37, and the collector electrode is connected with the collector electrode of the PNP triode Q6;
the cathode of D2 is used as the output of the PFC controller unit; the diode D7 is connected with the resistor R56 in series and then connects the demagnetization detection input end of a 5-pin (ZCD) boost inductor of the L6562 chip with the drive output of a 7-pin (GD) gate;
the 7-pin (GD) grid driving output end of the L6562 chip is connected with a resistor R58 in series and then respectively connected with an NPN triode Q2 base electrode and a PNP triode Q6 base electrode to form two reverse parallel circuits and drive a MOS tube Q9/Q10 to be alternately conducted, the drain electrode of the MOS tube Q9/Q10 is connected with the anode of the diode D2, and the source electrode of the MOS tube Q9/Q10 is respectively connected with the 4-pin (CS) PWM comparator input end of the L6562 chip through the resistor R60.
The input end of the Boost inductor L2 is connected with the output end of the ferrite core L1, and the output end of the Boost inductor L2 is respectively connected with the drain electrode of the MOS transistor Q9/Q10 and the anode of the diode D2 to form a Boost circuit of the PFC controller unit;
further, the FSFR2100 harmonic half-bridge converter chip adopted by the design is a controller of an integrated MOSFET (metal oxide semiconductor field effect transistor) pushed by femtograph semiconductors, and is specially designed for LLC (logical link control) resonant half-bridge converters. The FSFR2100 chip integrates the control part and the upper and lower switch tubes on one chip, so that the design is very simple, the complexity of peripheral design parameters of the LLC converter is reduced, the size of a power supply can be effectively reduced, and the power density of the power supply is improved. The integrated MOSFET has a body diode with a fast recovery function, and the working stability is improved. The chip has an accurate clock, and has a frequency limiting function, a soft start function, and various protection functions such as overvoltage, overcurrent and overtemperature. The chip can provide output with variable 50% duty ratio, the dead time is fixed to 350ns, and the switching frequency can reach 300kHz at most.
Referring to fig. 3, the FSFR2100 chip controls the soft start frequency by connecting the resistor R72 and the capacitor C41 in series and in parallel with the resistor R71. And the soft start frequency is set to be 4 times of the resonant frequency, so that the soft start achieves the aim of taking rapidity and stability into consideration.
In order to suppress surge current and overvoltage during the power-on phase, the voltage gain of the resonant cavity must be increased. Since the voltage gain is inversely proportional to the switching frequency, the soft start process is equivalent to a process in which the switching frequency is decreased from high. Inside the controller, there is a 3ms soft start procedure, which corresponds to an increase of 40kHz for the external soft start initial frequency.
The harmonic half-bridge converter unit comprises resistors (R70-R76, R10-R12, R14-R19), capacitors (C41-C53), diodes (D5, D9-D10), a transformer T and an FSFR2100 chip;
the power supply end of a 7-pin (LVcc) chip of the FSFR2100 chip is directly connected to a direct current power supply filtered by the capacitor C45;
one path of a 3-pin (RT) switching frequency control end of the FSFR2100 chip returns to a 2-pin (AR) protection control end through a resistor R70 and a resistor R73, the other path of the switching frequency control end is directly connected in series through a resistor R72 and a capacitor C41, is connected with the resistor R71 in parallel and then is grounded, and the capacitor C42 plays a role in filtering;
the current detection end of a 4-pin (CS) low-end MOSFET and the control ground end of a 5-pin (SG) of the FSFR2100 chip are connected through a resistor R74 and a resistor R75, and the power ground end of a 6-Pin (PG) is connected with the control ground end of the 5-pin (SG) and then grounded;
the driving end of the 8-pin (HVcc) high-side MOSFET of the FSFR2100 chip is driven by a direct-current power supply through a resistor R76 and a diode D5, and the driving end of the 8-pin (HVcc) high-side MOSFET of the FSFR2100 chip is connected with the driving end of the 9-pin (VCTR) low-side MOSFET of the FSFR2100 chip through a capacitor C48;
the capacitor C47, a main side coil of the transformer T and the resistor R12 are connected in series and then connected between a 1 pin (VDL) of the FSFR2100 chip and a 9 pin (VCTR) low-side MOSFET driving end of the FSFR2100 chip;
the secondary coil of the transformer T is connected with the output filtering unit;
the feedback control unit comprises a photoelectric isolator PC817, a shunt regulator d431, a resistor R14, a resistor R15, a resistor R17 and a resistor R18;
the resistor R10 is connected with the resistor R14 in series and then is connected with the anode of the light emitting diode in the photoelectric coupler PC 817;
the cathode of the light emitting diode in the photoelectric coupler PC817 is connected with the shunt regulator d 431;
the resistor R15 is connected with a light emitting diode in the photoelectric coupler PC817 in parallel;
an emitter in the photoelectric coupler PC817 is directly grounded;
a collector in the photoelectric coupler PC817 is connected with a 2-pin (AR) protection control end of the FSFR2100 chip through a resistor R73, and the capacitors C43 and C44 play a role in filtering;
the output end of the resistor R10 is connected to the reference input end of a shunt regulator d431 after being subjected to voltage division through a resistor R17 and a resistor R18, the cathode of the d431 is connected with the cathode of a light-emitting diode in the photoelectric coupler PC817, and the anode of the d431 is directly grounded;
the output filtering unit comprises a diode D9, a diode D10, a resistor R10, a resistor R11, an output capacitor C49 and an output capacitor C50;
the diode D9 returns to the upper half secondary coil through the resistor R10, the output capacitor C49 and the output capacitor C50 after coming out from the same-name end lead of the upper half secondary coil of the transformer T;
the diode D10 is led out from the lower half secondary coil of the transformer T and returns to the dotted end of the lower half secondary coil through the resistor R11, the output capacitor C49 and the output capacitor C50;
the utility model discloses a theory of operation does: the LLC resonant converter formed by the inductor and the capacitor is utilized, a Boost topological method is adopted, and the active power factor correction circuit is used for controlling the LED driving power supply to be switched in a mode of combining PFC and LLC half-bridge, so that the switching noise of the driving power supply is reduced, the power density of the driving power supply is improved, the traditional hard switching mode is replaced, the switching loss caused by the driving switch is reduced, and the conclusion of the high-power LED driving power supply on and off at zero voltage is realized.
In order to further verify the control performance of the high-power LED driving power supply resonance control method in the critical continuous mode, the practical effect of the technical scheme is adopted, a 48V/1.2A bipolar driving power supply is selected for experiment, and the performance index parameters are shown in Table 1. The test was performed using a clamp-on current probe, HIOKI3275, and a rig al DS5000E digital oscilloscope outputs the experimental results.
TABLE 1 LED drive Power Performance index
Figure BDA0002787473280000071
(1) The experimental test results of the high power LED driving power supply in the critical continuous mode in the full voltage range are shown in table 2.
TABLE 2 high power LED drive Power supply test results in full Voltage Range
Figure BDA0002787473280000081
The experimental results in table 2 show that the output current of the high-power LED driving power supply in the critical continuous mode is unchanged in the full voltage range, and the working efficiency and the PF value of the LED driving power supply are maintained at 88% to 0.99, which indicates that the performance index of the high-power LED driving power supply in the critical continuous mode controlled by the method meets the design requirement of the power supply, and the method has a good control effect.
(2) In order to ensure that the high-power LED driving power supply can realize the power supply protection function under the power-off condition and test the on-off delay time of the LED driving power supply under different input voltages, the protection time set by the national lamp safety standard needs to be more than 20ms, and the on-off delay time of the LED during the power-on and power-off is shown in a table 3.
TABLE 3 Start-Up and shut-down delay times at different input voltages
Figure BDA0002787473280000082
From the experimental results in table 3, it can be seen that the startup delay time and the shutdown delay time of the high-power LED driving power supply in the critical continuous mode controlled by the method are both greater than 20ms under different input voltages, and meet the national lamp startup and shutdown delay standard.
According to the data of the technical scheme, the scheme can achieve the purposes of realizing the autonomous regulation and control of the resonant frequency of the high-power LED driving power supply and zero-voltage switching, reducing the switching loss and improving the working performance of the LED driving power supply in a certain range, both in theory and practice.
Finally, it should be noted that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.

Claims (5)

1.一种临界连续下高功率LED驱动电源谐振控制装置，包括输入滤波整流单元、PFC控制器单元、谐波半桥变换器单元、反馈控制单元和输出滤波单元；所述输入滤波整流单元用于将市电输入的交流电转换为直流电；所述PFC控制器单元用于调整LED驱动电源谐振部分的频率变化值，具有控制谐波与调整电压功能；所述谐波半桥变换器单元用于调整电压增益，确保开关管实现零电压开关；所述反馈控制单元用于提高LED驱动电源的稳定性，提升LED驱动电源谐振控制效率；所述输出滤波单元用于将谐波半桥变换器单元输出的直流电源进行滤波，输出恒定电流驱动LED，其特征在于：1. A high-power LED drive power supply resonance control device under critical continuity, comprising an input filter rectifier unit, a PFC controller unit, a harmonic half-bridge converter unit, a feedback control unit and an output filter unit; the input filter rectifier unit uses It is used to convert the alternating current input from the mains into direct current; the PFC controller unit is used to adjust the frequency change value of the resonant part of the LED driving power supply, and has the functions of controlling harmonics and adjusting voltage; the harmonic half-bridge converter unit is used for Adjust the voltage gain to ensure that the switch tube realizes zero-voltage switching; the feedback control unit is used to improve the stability of the LED driving power supply and improve the resonance control efficiency of the LED driving power supply; the output filtering unit is used for the harmonic half-bridge converter unit. The output DC power is filtered to output a constant current to drive the LED, which is characterized by: 所述输入滤波整流单元包括保险管F1/RT1、压敏电阻MOV1/MOV2/MOV3、电阻R20/R21/R22、共模扼流圈LC1/LC2、差模铁氧体磁芯L1、整流芯片DB1和电容C1/C2/C10/C11/C12/CY1/CY2；The input filtering and rectifying unit includes a fuse F1/RT1, a varistor MOV1/MOV2/MOV3, a resistor R20/R21/R22, a common mode choke coil LC1/LC2, a differential mode ferrite core L1, and a rectifier chip DB1 and capacitors C1/C2/C10/C11/C12/CY1/CY2; 所述保险管F1/RT1的输入端分别与外接交流电源火、零线相连；压敏电阻MOV3并联于保险管F1/RT1的输出端；差模电容C12并联于压敏电阻MOV3；共模扼流圈LC2输入端并联于差模电容C12，输出端并联于差模电容C11；电阻R20/R21/R22串联后并联于差模电容C11及共模扼流圈LC1；而共模扼流圈LC1输出端并联于差模电容C10；整流芯片DB1输入端并联于差模电容C10，输出端连接于铁氧体磁芯L1与差模电容C1/C2组成的差模干扰抑制电路；压敏电阻MOV1/MOV2与陶瓷气体放电管组成防雷保护，并联于差模电容C10。The input ends of the fuse F1/RT1 are respectively connected with the external AC power source and the neutral line; the varistor MOV3 is connected in parallel with the output end of the fuse F1/RT1; the differential mode capacitor C12 is connected in parallel with the varistor MOV3; the common mode choke The input end of the flow coil LC2 is connected in parallel with the differential mode capacitor C12, and the output end is connected in parallel with the differential mode capacitor C11; the resistor R20/R21/R22 is connected in series with the differential mode capacitor C11 and the common mode choke coil LC1; and the common mode choke coil LC1 The output terminal is connected in parallel with the differential mode capacitor C10; the input terminal of the rectifier chip DB1 is connected in parallel with the differential mode capacitor C10, and the output terminal is connected to the differential mode interference suppression circuit composed of the ferrite core L1 and the differential mode capacitor C1/C2; the varistor MOV1 /MOV2 and ceramic gas discharge tube form lightning protection, which is connected in parallel with differential mode capacitor C10. 2.根据权利要求1所述的一种临界连续下高功率LED驱动电源谐振控制装置，其特征在于：所述PFC控制器单元包括电阻R1-R8、R20-R25、R28-R29、R37、R41-R42、R46、R51-R52、R56-R58、R60、R62-R66，电容C1-C5、C10-C13、C17、C19-C22、C24、C26、C35-C36，二极管D1-D4、D7-D8，MOS管Q1、Q9-Q10，稳压二极管Z1，三极管Q2-Q3、Q5-Q6，L6562芯片及升压电感L2；2 . The resonant control device for a high-power LED driving power supply under critical continuous condition according to claim 1 , wherein the PFC controller unit comprises resistors R1-R8, R20-R25, R28-R29, R37, R41 . 3 . -R42, R46, R51-R52, R56-R58, R60, R62-R66, capacitors C1-C5, C10-C13, C17, C19-C22, C24, C26, C35-C36, diodes D1-D4, D7-D8 , MOS tube Q1, Q9-Q10, Zener diode Z1, transistor Q2-Q3, Q5-Q6, L6562 chip and boost inductor L2; 所述铁氧体磁芯L1输出端经电阻R4、MOS管Q1、电阻R25与L6562芯片的8脚电源VCC端连接；The output end of the ferrite core L1 is connected to the 8-pin power VCC end of the L6562 chip through the resistor R4, the MOS transistor Q1, and the resistor R25; 所述MOS管Q1基极与NPN三极管Q3集电极相连，并交结于电阻R5、电阻R6、二极管D3及稳压二极管Z1组成的限压电路；所述三极管Q3发射极直接接地，基极串接电阻R29于电源VCC；The base of the MOS transistor Q1 is connected to the collector of the NPN transistor Q3, and is connected to a voltage limiting circuit composed of a resistor R5, a resistor R6, a diode D3 and a Zener diode Z1; the emitter of the transistor Q3 is directly grounded, and the base is connected in series Resistor R29 is connected to the power supply VCC; 所述铁氧体磁芯L1输出端经过串联电阻R1、电阻R2、电阻R3和电阻R24分压后，与L6562芯片的3脚乘法器输入端连接；The output end of the ferrite core L1 is connected to the 3-pin multiplier input end of the L6562 chip after being divided by the series resistor R1, the resistor R2, the resistor R3 and the resistor R24; 电容C26与电阻R23串联与电容C22并联后接入L6562芯片的2脚误差放大器输出端与L6562芯片的1脚误差放大器的反相输入端之间；The capacitor C26 is connected in series with the resistor R23 and the capacitor C22 in parallel and then connected between the 2-pin error amplifier output end of the L6562 chip and the 1-pin error amplifier inverting input end of the L6562 chip; PNP三极管Q5基极与L6562芯片的3脚乘法器输入端连接，发射极经过电阻R37连接于L6562芯片的5脚升压电感去磁侦测输入端，而集电极与PNP三极管Q6集电极相连；The base of PNP transistor Q5 is connected to the input terminal of the 3-pin multiplier of the L6562 chip, the emitter is connected to the demagnetization detection input terminal of the 5-pin boost inductor of the L6562 chip through the resistor R37, and the collector is connected to the collector of the PNP transistor Q6; D2的阴极作为所述PFC控制器单元的输出；二极管D7与电阻R56串联后将L6562芯片的5脚升压电感去磁侦测输入端和7脚栅极驱动输出相连接；The cathode of D2 is used as the output of the PFC controller unit; after the diode D7 is connected in series with the resistor R56, the 5-pin boost inductor demagnetization detection input of the L6562 chip is connected with the 7-pin gate drive output; 所述L6562芯片的7脚栅极驱动输出端串接电阻R58后分别与NPN三极管Q2基极、PNP三极管Q6基极相连，形成两个反向并联电路，并驱动MOS管Q9/Q10交替导通，MOS管Q9/Q10的漏极与二极管D2的阳极连接，MOS管Q9/Q10的源极分别经过电阻R60与L6562芯片的4脚PWM比较器输入端连接；The 7-pin gate drive output terminal of the L6562 chip is connected in series with the resistor R58 and then connected to the base of the NPN transistor Q2 and the base of the PNP transistor Q6, forming two anti-parallel circuits, and driving the MOS transistors Q9/Q10 to conduct alternately , the drain of the MOS tube Q9/Q10 is connected to the anode of the diode D2, and the source of the MOS tube Q9/Q10 is connected to the 4-pin PWM comparator input of the L6562 chip through the resistor R60 respectively; 所述升压电感L2输入端与铁氧体磁芯L1输出端连接，输出端分别与所述MOS管Q9/Q10的漏极、二极管D2的阳极相连接，形成PFC控制器单元的Boost电路。The input end of the boost inductor L2 is connected to the output end of the ferrite core L1, and the output ends are respectively connected to the drains of the MOS transistors Q9/Q10 and the anode of the diode D2 to form a boost circuit of the PFC controller unit. 3.根据权利要求1所述的一种临界连续下高功率LED驱动电源谐振控制装置，其特征在于：3. a kind of critical continuous lower high-power LED drive power resonance control device according to claim 1, is characterized in that: 所述谐波半桥变换器单元包括电阻R70-R76、R10-R12、R14-R19，电容C41-C53，二极管D5、D9-D10，变压器T及FSFR2100芯片；The harmonic half-bridge converter unit includes resistors R70-R76, R10-R12, R14-R19, capacitors C41-C53, diodes D5, D9-D10, transformer T and FSFR2100 chip; 所述FSFR2100芯片的7脚芯片供电端直接接入由所述电容C45滤波后的直流电源；The 7-pin chip power supply terminal of the FSFR2100 chip is directly connected to the DC power supply filtered by the capacitor C45; 所述FSFR2100芯片的3脚开关频率控制端一路经过电阻R70、电阻R73回到2脚保护控制端，另一路直接经过电阻R72、电容C41串联并与电阻R71并联后接地，所述电容C42起着滤波作用；The 3-pin switching frequency control terminal of the FSFR2100 chip returns to the 2-pin protection control terminal through the resistor R70 and the resistor R73, and the other way directly passes through the resistor R72 and the capacitor C41 in series and in parallel with the resistor R71 and then grounded. The capacitor C42 plays a role. filtering effect; 所述FSFR2100芯片的4脚低端MOSFET电流检测端、5脚控制地端通过电阻R74、电阻R75连接起来，而6脚功率地端与5脚控制地端相连接后接地；The 4-pin low-side MOSFET current detection terminal and the 5-pin control ground terminal of the FSFR2100 chip are connected through resistors R74 and R75, and the 6-pin power ground terminal is connected to the 5-pin control ground terminal and then grounded; 所述FSFR2100芯片的8脚高端MOSFET驱动端由直流电源经电阻R76、二极管D5驱动，并由电容C48将FSFR2100芯片的8脚高端MOSFET驱动端与FSFR2100芯片的9脚低端MOSFET驱动端进行相连接；电容C47、变压器T的主边线圈与电阻R12串联后接入FSFR2100芯片的1脚与FSFR2100芯片的9脚低端MOSFET驱动端之间；The 8-pin high-end MOSFET driving end of the FSFR2100 chip is driven by the DC power supply through the resistor R76 and the diode D5, and the capacitor C48 connects the 8-pin high-end MOSFET driving end of the FSFR2100 chip and the 9-pin low-end MOSFET driving end of the FSFR2100 chip. ;The capacitor C47, the main side coil of the transformer T and the resistor R12 are connected in series between the 1 pin of the FSFR2100 chip and the 9 pin low-end MOSFET driver of the FSFR2100 chip; 所述变压器T的副边线圈与所述输出滤波单元连接。The secondary winding of the transformer T is connected to the output filtering unit. 4.根据权利要求1所述的一种临界连续下高功率LED驱动电源谐振控制装置，其特征在于：4. a kind of critical continuous lower high-power LED drive power resonance control device according to claim 1, is characterized in that: 所述反馈控制单元包括光电隔离器PC817、并联稳压器d431、电阻R14、电阻R15、电阻R17及电阻R18；电阻R10串接电阻R14后与所述光电耦合器PC817中发光二极管的阳极连接；The feedback control unit includes an opto-isolator PC817, a shunt regulator d431, a resistor R14, a resistor R15, a resistor R17 and a resistor R18; the resistor R10 is connected in series with the resistor R14 and is connected to the anode of the light-emitting diode in the opto-coupler PC817; 所述光电耦合器PC817中发光二极管的阴极与所述并联稳压器d431连接；The cathode of the light-emitting diode in the photocoupler PC817 is connected with the shunt regulator d431; 所述电阻R15与所述光电耦合器PC817中的发光二极管并联；The resistor R15 is connected in parallel with the light emitting diode in the photocoupler PC817; 所述光电耦合器PC817中的发射极直接接地；The emitter in the photocoupler PC817 is directly grounded; 所述光电耦合器PC817中的集电极经过电阻R73与所述FSFR2100芯片的2脚保护控制端连接，电容C43、C44起着滤波作用；The collector in the photocoupler PC817 is connected to the 2-pin protection control terminal of the FSFR2100 chip through the resistor R73, and the capacitors C43 and C44 play a filtering role; 所述电阻R10的输出端经电阻R17、电阻R18分压后接入并联稳压器d431的参考输入端，d431的阴极与所述光电耦合器PC817中发光二极管的阴极连接，d431的阳极直接接地。The output terminal of the resistor R10 is divided by the resistor R17 and the resistor R18 and then connected to the reference input terminal of the shunt regulator d431. The cathode of d431 is connected to the cathode of the light-emitting diode in the photocoupler PC817, and the anode of d431 is directly grounded . 5.根据权利要求1所述的一种临界连续下高功率LED驱动电源谐振控制装置，其特征在于：5. a kind of critical continuous lower high-power LED drive power resonance control device according to claim 1, is characterized in that: 所述输出滤波单元包括二极管D9、二极管D10、电阻R10、电阻R11及输出电容C49、输出电容C50；The output filtering unit includes a diode D9, a diode D10, a resistor R10, a resistor R11, an output capacitor C49, and an output capacitor C50; 所述二极管D9从变压器T的上半副边线圈同名端引线出来后，经电阻R10、输出电容C49、输出电容C50回到上半副边线圈；After the diode D9 is led out from the same-named end of the upper half of the secondary coil of the transformer T, it returns to the upper half of the secondary coil through the resistor R10, the output capacitor C49, and the output capacitor C50; 所述二极管D10从变压器T的下半副边线圈引线出来后，经电阻R11、输出电容C49、输出电容C50回到下半副边线圈同名端。After the diode D10 is led out from the lower half of the secondary coil of the transformer T, it returns to the same name terminal of the lower half of the secondary coil through the resistor R11, the output capacitor C49 and the output capacitor C50.
CN202022692467.0U 2020-11-19 2020-11-19 High-power LED driving power supply resonance control device under critical continuity Expired - Fee Related CN213907002U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114143932A (en) * 2021-11-30 2022-03-04 中国核电工程有限公司 Irradiation-resistant low-harmonic LED drive circuit and LED lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114143932A (en) * 2021-11-30 2022-03-04 中国核电工程有限公司 Irradiation-resistant low-harmonic LED drive circuit and LED lamp

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