High-power dimmable LED driving power supply

By designing a high-power dimmable LED driver power supply, and using the collaborative work of multiple circuit modules, the brightness adjustment and power control of LED lamps are realized, the problem of imperfect dimming technology of existing LED lamps is solved, the brightness adjustment accuracy and efficiency are improved, and the protection function is provided.

CN222602617UActive Publication Date: 2025-03-11SHENZHEN FUSHUO PHOTOELECTRIC TECH CO LTD
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Patent Information

Application Number
CN202420856873.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-24
Publication Date
2025-03-11
Estimated Expiration
2034-04-24

AI Technical Summary

Technical Problem

The dimming technology of existing LED lights is not perfect enough to dim according to the usage environment, resulting in the inability to meet the brightness needs of different usage environments.

Method used

A high-power dimmable LED driver power supply is designed, including EMI circuit module, filtering and rectifying module, power correction module, load filtering module, transformer rectifying module, optical coupling transmission feedback circuit and dimmable circuit module. Through the coordinated work of these modules, the light source dimming and power switch control of the LED load is realized.

Benefits of technology

The brightness adjustment range of LED lamps is achieved to reach 0-10V or 0-20V, ensuring dimming accuracy, improving efficiency, reducing power consumption and heat loss, and having protection functions such as overvoltage, overcurrent, overload, and short circuit to ensure the stability and safety of LEDs.

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Abstract

The utility model discloses a high-power dimmable LED driving power supply, which relates to the field of voltage supply, and comprises an EMI circuit module used for introducing alternating current, filtering interference signals and outputting the filtered interference signals to a filtering and rectifying module; the beneficial effects of the utility model are that the dimmable circuit module can carry out dimming according to the use environment under the condition that the illumination lamp allows the dimming, and ensures that the dimming precision is within a certain range; the efficiency is improved and the power consumption and the heat loss are reduced while the brightness of the LED is ensured as required; good stability is achieved, so that the problem of brightness fluctuation or flickering and the like cannot occur in the long-time use process of the LED; the LED driving power supply has the protection functions of over-voltage, over-current, overload, short circuit and the like, so that the safety of the LED and the driving power supply is protected, and the LED driving power supply can be compatible with different types of LEDs and can adapt to different LED working environments and working conditions.
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Description

Technical Field

[0001] The utility model relates to the field of voltage supply, in particular to a high-power dimmable LED driving power supply. Background Art

[0002] As people's living standards improve, the automation and intelligence of LED lights have attracted attention. The existing dimming technology of LED lights is not perfect and cannot be dimmed according to the use environment, which needs to be improved. Utility Model Content

[0003] The purpose of the utility model is to provide a high-power dimmable LED driving power supply to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A high-power dimmable LED driver power supply, comprising:

[0006] EMI circuit module, used to introduce AC power, filter out interference signals and output to the filter and rectifier module;

[0007] The filter and rectifier module is used to convert AC power into DC power and output it to the power correction module;

[0008] The power correction module is used to correct the input DC power through the power factor; the corrected DC power is output to the load filter module;

[0009] A load filter module is used to rectify and filter the corrected DC power and then output it to the transformer and rectifier module;

[0010] Transformer and rectifier module, used for post-rectification output of input DC power to supply LED load;

[0011] The optocoupler transmission feedback circuit is used to detect the voltage information output to the LED load, obtain the feedback signal, and output the feedback signal to the power control module;

[0012] The power control module is used to selectively control whether the load filter module is turned on according to the size of the feedback signal to realize the LED load power switch control;

[0013] A dimmable circuit module is used to dim the light source of the LED load;

[0014] The output end of the EMI circuit module is connected to the input end of the filter and rectifier module, the output end of the filter and rectifier module is connected to the first input end of the power correction module, the output end of the power correction module is connected to the first input end of the load filter module, the output end of the load filter module is connected to the input end of the transformer and rectifier module, the output end of the transformer and rectifier module is connected to the input end of the optocoupler transmission feedback module, the output end of the optocoupler transmission feedback module is connected to the input end of the power control module and the input end of the dimmable circuit module, the output end of the power control module is connected to the second input end of the load filter module, and the output end of the dimmable circuit module is connected to the second input end of the power correction module.

[0015] As a further solution of the utility model: the power correction module includes a chip U3, the model of the chip U3 is NCP1654, the No. 4 pin of the chip U3 is connected to one end of the capacitor C8, one end of the resistor R10, and one end of the resistor R15, the other end of the capacitor C8 is grounded, the other end of the resistor R10 is grounded, the other end of the resistor R15 is connected to one end of the inductor L1, the positive electrode of the diode D4, and the output end of the filter rectifier module through the resistor R13 and the resistor R16 in sequence, the other end of the inductor L1 is connected to the positive electrode of the diode D7 and the D pole of the MOS tube Q1, and the negative pole of the diode D7 is connected to the thermistor One end of the resistor NTC1 and the first input end of the load filter module, the other end of the thermistor NTC1 is connected to the cathode of the diode D4, the S pole of the MOS tube Q1 is grounded, the G pole of the MOS tube Q1 is connected to one end of the resistor R17 and one end of the resistor R19, the other end of the resistor R19 is connected to the emitter of the transistor Q4, the other end of the resistor R17 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the base of the transistor Q4 and the No. 8 pin of the chip U3, the collector of the transistor Q4 is grounded, and the No. 7 pin of the chip U3 is connected to the output end of the dimmable circuit module through the resistor R14.

[0016] As a further solution of the utility model: the optocoupler transmission feedback module includes an amplifier U11A, an amplifier U11B, and an optocoupler U1. The inverting end of the amplifier U11A is connected to one end of a resistor R89 ​​and one end of a capacitor C37. The other end of the resistor R89 ​​is connected to the output end of the transformer rectifier module. The other end of the capacitor C37 is connected to one end of a resistor R73. The other end of the resistor R73 is connected to the output end of the amplifier U11A, one end of a resistor R65, and one end of a resistor R61. The other end of the resistor R65 is connected to a negative electrode of a diode D21. The positive electrode of the diode D21 is connected to the second end of the optocoupler U1. , the first end of the optocoupler U1 is connected to the other end of the resistor R61, the fourth end of the optocoupler U1 is connected to one end of the resistor R57, the resistor R57 introduces the power supply voltage VCC, the third end of the optocoupler U1 is connected to the input end of the power control module, the in-phase end of the amplifier U11A is grounded through the capacitor C48, the other end of the cathode of the diode D21 is connected to one end of the resistor R64, the other end of the resistor R64 is connected to the output end of the amplifier U11B, the inverting end of the amplifier U11B is connected to the output end of the transformer rectifier module through the resistor R96, and the in-phase end of the amplifier U11B is connected to the dimmable circuit module through the resistor R93.

[0017] As a further solution of the utility model: the power control module includes a chip U6, the model of the chip U6 is NCP1397, the pin 6 of the chip U6 is connected to the output end of the optocoupler transmission feedback module, the pin 5 of the chip U6 is connected to one end of the resistor R44 and one end of the resistor R24, the other end of the resistor R44 is grounded, the other end of the resistor R24 ​​is connected to the output end of the power correction module through the resistor R30 and the resistor R23 in sequence, the pin 15 of the chip U6 is connected to one end of the resistor R41 and the positive electrode of the diode D15, the other end of the resistor R41 is connected to the negative electrode of the diode D15, the base of the transistor Q7, and the base of the transistor Q8, the emitter of the transistor Q8 is connected to the emitter of the transistor Q7, one end of the resistor R42, and the negative electrode of the diode D19, the other end of the resistor R42 is connected to the positive electrode of the diode D19, one end of the resistor R46, and the resistor R47 is connected to the positive electrode of the diode D19. 6 is connected to the second input end of the load filter module, the collector of the transistor Q7 is connected to pin 14 of the chip U6, the collector of the transistor Q8 is connected to the cathode of the diode D18, the anode of the diode D18 is connected to one end of the resistor R45 and the collector of the transistor Q9, the other end of the resistor R45 is connected to the power supply voltage VCC, the emitter of the transistor Q9 is connected to the emitter of the transistor Q10, one end of the resistor R51, and the cathode of the diode D23, the other end of the resistor R51 is connected to the anode of the diode D23 and one end of the resistor R63, the other end of the resistor R63 is connected to the second input end of the load filter module, the collector of the transistor Q10 is grounded, the base of the transistor Q10 is connected to the base of the transistor Q9, one end of the resistor R47, and the anode of the diode D20, and the cathode of the diode D20 is connected to the other end of the resistor R47 and pin 11 of the chip U6.

[0018] As a further solution of the utility model: the adjustable light circuit module includes an optocoupler U2, an amplifier U9B, and a chip U5. The model of the chip U5 is CR5269. The output end of the amplifier U9B is connected to one end of a resistor R82 and one end of a resistor R81. The other end of the resistor R82 is connected to the output end of the optocoupler transmission feedback module. The inverting end of the optocoupler U9B is connected to the other end of the resistor R81 and one end of the resistor R76. The other end of the resistor R76 is grounded. The in-phase end of the amplifier U9B is connected to one end of a resistor R74. The other end of the resistor R74 is connected to the reference electrode of a controllable precision voltage stabilizing source U8. The positive electrode of the controllable precision voltage stabilizing source U8 is grounded. The negative electrode of 8 is connected to one end of resistor R62, the other end of resistor R62 is connected to one end of resistor R66 and one end of resistor R56, the other end of resistor R66 is connected to the first end of optocoupler U2, the second end of optocoupler U2 is connected to the negative electrode of controllable precision voltage stabilizing source U7, the positive electrode of controllable precision voltage stabilizing source U7 is grounded, the reference electrode of controllable precision voltage stabilizing source U7 is connected to the other end of resistor R56, one end of resistor R68, and one end of resistor R70, the other end of resistor R68 is grounded, the other end of resistor R70 is grounded, the fourth end of optocoupler U2 is grounded, the third end of optocoupler U2 is connected to pin 3 of chip U5, and the model of controllable precision voltage stabilizing source U7 and U8 is TL431.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: when the lighting fixture allows, the dimmable circuit module of the utility model can be dimmed according to the use environment, and the power supply can accurately control the brightness of the LED to reach the dimming range of 0-10V or 0-20V, and the dimming accuracy is guaranteed to be within a certain range; while ensuring the brightness of the LED as needed, the efficiency is improved, the power consumption and heat loss are reduced; and it has good stability to ensure that the LED will not have problems such as brightness fluctuation or flickering during long-term use; it also has overvoltage, overcurrent, overload, short circuit and other protection functions to protect the safety of the LED and the driving power supply, can be compatible with different types of LEDs, and can adapt to different LED working environments and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a circuit diagram of a high-power dimmable LED driving power supply. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 , a high-power dimmable LED driver power supply, comprising:

[0023] EMI circuit module, used to introduce AC power, filter out interference signals and output to the filter and rectifier module;

[0024] The filter and rectifier module is used to convert AC power into DC power and output it to the power correction module;

[0025] The power correction module is used to correct the input DC power through the power factor; the corrected DC power is output to the load filter module;

[0026] A load filter module is used to rectify and filter the corrected DC power and then output it to the transformer and rectifier module;

[0027] Transformer and rectifier module, used for post-rectification output of input DC power to supply LED load;

[0028] The optocoupler transmission feedback circuit is used to detect the voltage information output to the LED load, obtain the feedback signal, and output the feedback signal to the power control module;

[0029] The power control module is used to selectively control whether the load filter module is turned on according to the size of the feedback signal to realize the LED load power switch control;

[0030] A dimmable circuit module is used to dim the light source of the LED load;

[0031] The output end of the EMI circuit module is connected to the input end of the filter and rectifier module, the output end of the filter and rectifier module is connected to the first input end of the power correction module, the output end of the power correction module is connected to the first input end of the load filter module, the output end of the load filter module is connected to the input end of the transformer and rectifier module, the output end of the transformer and rectifier module is connected to the input end of the optocoupler transmission feedback module, the output end of the optocoupler transmission feedback module is connected to the input end of the power control module and the input end of the dimmable circuit module, the output end of the power control module is connected to the second input end of the load filter module, and the output end of the dimmable circuit module is connected to the second input end of the power correction module.

[0032] In the specific embodiment: see Figure 1The EMI filter module includes common mode inductors LF1, LF2, LF3, capacitors CY1, CY5, CY6, CY7, CX1, CX2, resistors R1, R2, varistors MOV1, MOV2, MOV3, MOV4 and fuse F1. The capacitors CX1 and CX5 are connected in parallel to the input and output ends of the common mode suppression inductor LF2. The capacitors CX6 and CX7 are connected in parallel to the input and output ends of the common mode suppression inductors LF1 and LF3, thereby forming a multi-order filter circuit to effectively suppress the interference noise generated in the circuit and more effectively reduce the conducted interference of the circuit to the mains. The resistors R1 and R2 are connected in parallel to the input and output ends of the common mode suppression inductor LF3. The varistors MOV1 and MOV2 are connected in parallel at both ends of the capacitor CX1, the varistor MOV3 is connected in parallel at both ends of the capacitors CY1 and CY5, and the varistor MOV4 is connected in parallel at both ends of the capacitors CY6 and CY7. Their function is to discharge the capacitors to prevent testers and debuggers from being electrocuted during operation.

[0033] The filter rectifier module includes a rectifier bridge DB1. After the AC power source passes through the EMI filter module, the interference signal generated by itself can be well suppressed. After the power source after the EMI filter module passes through the rectifier circuit composed of the rectifier bridge DB1, the power signal is converted from the original AC AC power source to a DC pulsating power source.

[0034] The load filtering module includes a diode D14, a diode D11, a diode D7, a diode D8, a capacitor CX3, a MOS tube Q3, and a MOS tube Q2. The DC input corrected by the power correction module is rectified again by diodes D14, D11, D7, and D8, and filtered by capacitor CX3 to become a stable DC power. The power control module controls the G-pole conduction status of the MOS tubes Q3 and Q2 to serve as a power switch to control whether to supply power to the transformer rectifier module.

[0035] The transformer rectifier module is composed of rectifier diodes D19 and D18, capacitors EC8, EC9, EC10, EC11, CY9 and CY10, resistors R96 and CR3, and common mode inductor LF4. The cathodes of the rectifier diodes D16 and D18 are connected to the secondary output end of the transformer T1, and the anodes are connected to the cathodes of the capacitors EC8, EC9 and EC10 and grounded at the same time. The common mode inductor LF4 is connected to the secondary output end of the transformer T1, and the other end is connected in parallel with the capacitor EC11 to filter and output to the load. The DC power is processed to power the LED load.

[0036] In this example: See Figure 1The power correction module includes a chip U3, the model of the chip U3 is NCP1654, the No. 4 pin of the chip U3 is connected to one end of the capacitor C8, one end of the resistor R10, and one end of the resistor R15, the other end of the capacitor C8 is grounded, the other end of the resistor R10 is grounded, the other end of the resistor R15 is connected to one end of the inductor L1, the positive electrode of the diode D4, and the output end of the filter rectifier module through the resistor R13 and the resistor R16 in sequence, the other end of the inductor L1 is connected to the positive electrode of the diode D7 and the D pole of the MOS tube Q1, and the negative pole of the diode D7 is connected to the negative pole of the thermistor NTC1 One end is connected to the first input end of the load filter module, the other end of the thermistor NTC1 is connected to the cathode of the diode D4, the S pole of the MOS tube Q1 is grounded, the G pole of the MOS tube Q1 is connected to one end of the resistor R17 and one end of the resistor R19, the other end of the resistor R19 is connected to the emitter of the transistor Q4, the other end of the resistor R17 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the base of the transistor Q4 and the No. 8 pin of the chip U3, the collector of the transistor Q4 is grounded, and the No. 7 pin of the chip U3 is connected to the output end of the dimmable circuit module through the resistor R14.

[0037] Pin 4 of chip U3 receives the sampling signal, which in turn changes the output of pin 8 of chip U3, changes the conduction state of transistor Q4, and then changes the conduction state of MOS tube Q1, and changes the final voltage information at the common point HV, thereby realizing power correction to improve the power factor.

[0038] In this example: See Figure 1 The optocoupler transmission feedback module includes an amplifier U11A, an amplifier U11B, and an optocoupler U1. The inverting end of the amplifier U11A is connected to one end of a resistor R89 ​​and one end of a capacitor C37. The other end of the resistor R89 ​​is connected to the output end of the transformer rectifier module. The other end of the capacitor C37 is connected to one end of a resistor R73. The other end of the resistor R73 is connected to the output end of the amplifier U11A, one end of a resistor R65, and one end of a resistor R61. The other end of the resistor R65 is connected to a negative electrode of a diode D21. The positive electrode of the diode D21 is connected to the second end of the optocoupler U1. The first end of the optocoupler U1 One end is connected to the other end of resistor R61, the fourth end of the optocoupler U1 is connected to one end of resistor R57, the resistor R57 introduces the power supply voltage VCC, the third end of the optocoupler U1 is connected to the input end of the power control module, the in-phase end of the amplifier U11A is grounded through the capacitor C48, the other end of the cathode of the diode D21 is connected to one end of the resistor R64, the other end of the resistor R64 is connected to the output end of the amplifier U11B, the inverting end of the amplifier U11B is connected to the output end of the transformer rectifier module through the resistor R96, and the in-phase end of the amplifier U11B is connected to the dimmable circuit module through the resistor R93.

[0039] The inverting end of the amplifier U11A collects the negative pole (LED-) voltage information output to the LED load, and changes the level of the output end of the amplifier U11A according to the sampled information, thereby triggering the photosensitive diodes built into the first and second ends of the optocoupler U1 to be turned on. When turned on, the output trigger signal PC4 is supplied to the power control module.

[0040] The inverting end of the amplifier U11B collects the positive electrode (LED-) voltage information output to the LED load, and changes the output level of the amplifier U11A according to the sampled information, and feeds back to the dimmable circuit module.

[0041] In this example: See Figure 1 The power control module includes a chip U6, the model of the chip U6 is NCP1397, the No. 6 pin of the chip U6 is connected to the output end of the optocoupler transmission feedback module, the No. 5 pin of the chip U6 is connected to one end of the resistor R44 and one end of the resistor R24, the other end of the resistor R44 is grounded, the other end of the resistor R24 ​​is connected to the output end of the power correction module through the resistor R30 and the resistor R23 in sequence, the No. 15 pin of the chip U6 is connected to one end of the resistor R41 and the positive electrode of the diode D15, the other end of the resistor R41 is connected to the negative electrode of the diode D15, the base of the transistor Q7, and the base of the transistor Q8, the emitter of the transistor Q8 is connected to the emitter of the transistor Q7, one end of the resistor R42, and the negative electrode of the diode D19, the other end of the resistor R42 is connected to the positive electrode of the diode D19, one end of the resistor R46, and the other end of the resistor R46 is connected At the second input end of the load filter module, the collector of the transistor Q7 is connected to pin No. 14 of the chip U6, the collector of the transistor Q8 is connected to the cathode of the diode D18, the anode of the diode D18 is connected to one end of the resistor R45 and the collector of the transistor Q9, the other end of the resistor R45 is connected to the power supply voltage VCC, the emitter of the transistor Q9 is connected to the emitter of the transistor Q10, one end of the resistor R51, and the cathode of the diode D23, the other end of the resistor R51 is connected to the anode of the diode D23 and one end of the resistor R63, the other end of the resistor R63 is connected to the second input end of the load filter module, the collector of the transistor Q10 is grounded, the base of the transistor Q10 is connected to the base of the transistor Q9, one end of the resistor R47, and the anode of the diode D20, and the cathode of the diode D20 is connected to the other end of the resistor R47 and pin No. 11 of the chip U6.

[0042] The CSS soft start discharge pin (pin 1) of the NCP1397 controller chip U6 is connected to the soft start capacitor C21 and reset before startup or during overload conditions. The Fmax pin (pin 2) sets the maximum frequency deviation through the maximum frequency clamp resistor R36, and the timer duration is set in the presence of a fault. The Rt pin (pin 4) sets the minimum frequency deviation through the minimum frequency clamp resistor R49, setting the minimum oscillator frequency to achieve VFB = 1V. The BO pin (pin 5) detects low input voltage conditions. When the maximum input voltage condition is reached, it completely locks the controller. The FB pin (pin 6) is connected to the optocoupler U1 for feedback. The DT pin (pin 7) has a dead time width that is adjusted by a simple resistor R60. Skip / Disable After the Skip or Disable input is released, a clean startup sequence is generated if VFB < 0.3 V. The NCP1397 monitors the input voltage changes through the internal voltage monitoring circuit and adjusts the output voltage according to the input voltage changes. The output current is limited by the internal current limiting circuit to protect the LED load from being overdriven. The output can be automatically turned off when the output port is short-circuited to protect the LED and power supply. NCP1397 can adapt to different input voltages and load conditions through the internal frequency adaptive circuit to provide the best LED driving effect. Through the output status of pins 11 and 15, the conduction status of transistors Q7, Q8, Q9, and Q10 is changed to control the conduction status of MOS tubes Q2 and Q3 (the second input terminal of the load filter module), thereby controlling whether the circuit supplies power to the LED load.

[0043] In this example: See Figure 1The adjustable light circuit module includes an optocoupler U2, an amplifier U9B, and a chip U5. The model of the chip U5 is CR5269. The output end of the amplifier U9B is connected to one end of a resistor R82 and one end of a resistor R81. The other end of the resistor R82 is connected to the output end of the optocoupler transmission feedback module. The inverting end of the optocoupler U9B is connected to the other end of the resistor R81 and one end of the resistor R76. The other end of the resistor R76 is grounded. The in-phase end of the amplifier U9B is connected to one end of a resistor R74. The other end of the resistor R74 is connected to the reference electrode of the controllable precision voltage stabilizing source U8. The positive electrode of the controllable precision voltage stabilizing source U8 is grounded. The negative electrode of the controllable precision voltage stabilizing source U8 is connected to the reference electrode of the controllable precision voltage stabilizing source U8. One end of resistor R62, the other end of resistor R62 is connected to one end of resistor R66 and one end of resistor R56, the other end of resistor R66 is connected to the first end of optocoupler U2, the second end of optocoupler U2 is connected to the negative electrode of controllable precision voltage regulator U7, the positive electrode of controllable precision voltage regulator U7 is grounded, the reference electrode of controllable precision voltage regulator U7 is connected to the other end of resistor R56, one end of resistor R68, and one end of resistor R70, the other end of resistor R68 is grounded, the other end of resistor R70 is grounded, the fourth end of optocoupler U2 is grounded, the third end of optocoupler U2 is connected to pin 3 of chip U5, and the model of controllable precision voltage regulator U7 and U8 is TL431.

[0044] Chip U5 can control the brightness of the LED load by adjusting the resistance value. The CR5269 chip contains an adjustable resistor and a comparator. When the external voltage passes through the adjustable resistors R20 and R30, their resistance value will change. This change will be detected by the comparator and the output will be controlled according to the preset threshold. The output signal can be a PWM signal or a digital signal to control the brightness of the LED load. By changing the resistance value of the adjustable resistor R1, the dimming effect of the LED load can be achieved.

[0045] The working principle of the utility model is as follows: the EMI circuit module is used to introduce alternating current, and outputs it to the filter and rectifier module after filtering out the interference signal; the filter and rectifier module is used to convert the alternating current into direct current, and outputs it to the power correction module; the power correction module is used to correct the input direct current, and outputs the corrected direct current to the load filter module through the power factor; the load filter module is used to rectify and filter the corrected direct current, and then output it to the transformer and rectifier module; the transformer and rectifier module is used to facilitate the post-rectification output of the input direct current to supply the LED load; the optical coupler transmission feedback circuit is used to detect the voltage information output to the LED load, obtain the feedback signal, and output the feedback signal to the power control module; the power control module is used to selectively control whether the load filter module is turned on according to the size of the feedback signal, so as to realize the LED load power switch control; the dimmable circuit module is used to realize the light source dimming of the LED load.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-power dimmable LED driver, characterized in that: The high-power dimmable LED driver includes: EMI circuit module, used to introduce AC power, filter out interference signals and output to the filter and rectifier module; The filter and rectifier module is used to convert AC power into DC power and output it to the power correction module; The power correction module is used to correct the input DC power through the power factor; the corrected DC power is output to the load filter module; A load filter module is used to rectify and filter the corrected DC power and then output it to the transformer and rectifier module; Transformer and rectifier module, used for post-rectification output of input DC power to supply LED load; The optocoupler transmission feedback circuit is used to detect the voltage information output to the LED load, obtain the feedback signal, and output the feedback signal to the power control module; The power control module is used to selectively control whether the load filter module is turned on according to the size of the feedback signal to realize the LED load power switch control; A dimmable circuit module is used to dim the light source of the LED load; The output end of the EMI circuit module is connected to the input end of the filter and rectifier module, the output end of the filter and rectifier module is connected to the first input end of the power correction module, the output end of the power correction module is connected to the first input end of the load filter module, the output end of the load filter module is connected to the input end of the transformer and rectifier module, the output end of the transformer and rectifier module is connected to the input end of the optocoupler transmission feedback module, the output end of the optocoupler transmission feedback module is connected to the input end of the power control module and the input end of the dimmable circuit module, the output end of the power control module is connected to the second input end of the load filter module, and the output end of the dimmable circuit module is connected to the second input end of the power correction module.

2. The high-power dimmable LED driver according to claim 1, characterized in that: The power correction module includes a chip U3, the model of the chip U3 is NCP1654, the No. 4 pin of the chip U3 is connected to one end of the capacitor C8, one end of the resistor R10, and one end of the resistor R15, the other end of the capacitor C8 is grounded, the other end of the resistor R10 is grounded, the other end of the resistor R15 is connected to one end of the inductor L1, the positive electrode of the diode D4, and the output end of the filter rectifier module through the resistor R13 and the resistor R16 in sequence, the other end of the inductor L1 is connected to the positive electrode of the diode D7 and the D pole of the MOS tube Q1, and the negative pole of the diode D7 is connected to the negative pole of the thermistor NTC1 One end is connected to the first input end of the load filter module, the other end of the thermistor NTC1 is connected to the cathode of the diode D4, the S pole of the MOS tube Q1 is grounded, the G pole of the MOS tube Q1 is connected to one end of the resistor R17 and one end of the resistor R19, the other end of the resistor R19 is connected to the emitter of the transistor Q4, the other end of the resistor R17 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the base of the transistor Q4 and the No. 8 pin of the chip U3, the collector of the transistor Q4 is grounded, and the No. 7 pin of the chip U3 is connected to the output end of the dimmable circuit module through the resistor R14.

3. The high-power dimmable LED driver according to claim 1, characterized in that: The optocoupler transmission feedback module includes an amplifier U11A, an amplifier U11B, and an optocoupler U1. The inverting end of the amplifier U11A is connected to one end of a resistor R89 ​​and one end of a capacitor C37. The other end of the resistor R89 ​​is connected to the output end of the transformer rectifier module. The other end of the capacitor C37 is connected to one end of a resistor R73. The other end of the resistor R73 is connected to the output end of the amplifier U11A, one end of a resistor R65, and one end of a resistor R61. The other end of the resistor R65 is connected to a negative electrode of a diode D21. The positive electrode of the diode D21 is connected to the second end of the optocoupler U1. The first end of the optocoupler U1 The first end of the optical coupler U1 is connected to the other end of the resistor R61, the fourth end of the optical coupler U1 is connected to one end of the resistor R57, the resistor R57 introduces the power supply voltage VCC, the third end of the optical coupler U1 is connected to the input end of the power control module, the in-phase end of the amplifier U11A is grounded through the capacitor C48, the other end of the cathode of the diode D21 is connected to one end of the resistor R64, the other end of the resistor R64 is connected to the output end of the amplifier U11B, the inverting end of the amplifier U11B is connected to the output end of the transformer and rectifier module through the resistor R96, and the in-phase end of the amplifier U11B is connected to the dimmable circuit module through the resistor R93.

4. The high-power dimmable LED driver according to claim 1 or 3, characterized in that: The power control module includes a chip U6, the model of chip U6 is NCP1397, pin 6 of chip U6 is connected to the output end of the optocoupler transmission feedback module, pin 5 of chip U6 is connected to one end of resistor R44 and one end of resistor R24, the other end of resistor R44 is grounded, the other end of resistor R24 ​​is connected to the output end of the power correction module through resistor R30 and resistor R23 in sequence, pin 15 of chip U6 is connected to one end of resistor R41 and the positive electrode of diode D15, the other end of resistor R41 is connected to the negative electrode of diode D15, the base of transistor Q7, and the base of transistor Q8, the emitter of transistor Q8 is connected to the emitter of transistor Q7, one end of resistor R42, and the negative electrode of diode D19, the other end of resistor R42 is connected to the positive electrode of diode D19 and one end of resistor R46, and the other end of resistor R46 is connected to the negative The second input end of the load filter module, the collector of the transistor Q7 is connected to pin 14 of the chip U6, the collector of the transistor Q8 is connected to the cathode of the diode D18, the anode of the diode D18 is connected to one end of the resistor R45 and the collector of the transistor Q9, the other end of the resistor R45 is connected to the power supply voltage VCC, the emitter of the transistor Q9 is connected to the emitter of the transistor Q10, one end of the resistor R51, and the cathode of the diode D23, the other end of the resistor R51 is connected to the anode of the diode D23 and one end of the resistor R63, the other end of the resistor R63 is connected to the second input end of the load filter module, the collector of the transistor Q10 is grounded, the base of the transistor Q10 is connected to the base of the transistor Q9, one end of the resistor R47, and the anode of the diode D20, and the cathode of the diode D20 is connected to the other end of the resistor R47 and pin 11 of the chip U6.

5. The high-power dimmable LED driver according to claim 1 or 3, characterized in that: The dimmable light circuit module includes an optocoupler U2, an amplifier U9B, and a chip U5. The model of chip U5 is CR5269. The output end of amplifier U9B is connected to one end of resistor R82 and one end of resistor R81. The other end of resistor R82 is connected to the output end of the optocoupler transmission feedback module. The inverting end of optocoupler U9B is connected to the other end of resistor R81 and one end of resistor R76. The other end of resistor R76 is grounded. The in-phase end of amplifier U9B is connected to one end of resistor R74. The other end of resistor R74 is connected to the reference electrode of controllable precision voltage stabilizing source U8. The positive electrode of controllable precision voltage stabilizing source U8 is grounded. The negative electrode of controllable precision voltage stabilizing source U8 is connected to resistor One end of R62, the other end of resistor R62 is connected to one end of resistor R66 and one end of resistor R56, the other end of resistor R66 is connected to the first end of optocoupler U2, the second end of optocoupler U2 is connected to the negative electrode of controllable precision voltage regulator U7, the positive electrode of controllable precision voltage regulator U7 is grounded, the reference electrode of controllable precision voltage regulator U7 is connected to the other end of resistor R56, one end of resistor R68, and one end of resistor R70, the other end of resistor R68 is grounded, the other end of resistor R70 is grounded, the fourth end of optocoupler U2 is grounded, the third end of optocoupler U2 is connected to pin 3 of chip U5, and the model of controllable precision voltage regulator U7 and U8 is TL431.