An isolated high-power constant current controllable high-speed flashing LED dimming power supply

Abstract

The present invention discloses an isolated high-power constant-current controllable high-speed flashing LED dimming power supply, comprising a front-stage large-capacity electrolytic capacitor module, a DC-DC power conversion control module, a feedback module, a power supply module, a rear-stage large-capacity electrolytic capacitor module, a dimming circuit control module, an MCU module and a MOS tube Q801; the MCU module can control the dimming circuit control module to shut down the energy output of the DC-DC power conversion control module and control the MOS tube Q801 to shut down when receiving a flashing signal, and after maintaining a set shutdown time, first turn on the MOS tube Q801 and then turn on the DC-DC power conversion control module to output energy; through the above circuit, the isolated high-power constant-current power supply can also support a flashing mode in any dimming current segment, and can achieve multiple or dozens of controllable flashes within 1 second, meeting the use requirements.

Description

Technical Field

[0001] The invention relates to the field of intelligent LED control power supply, and in particular to an isolated high-power constant-current controllable high-speed flashing LED dimming power supply. Background Art

[0002] With the mature development of LED industry, the functional requirements are becoming more and more diversified. Some LED power supplies need to support the flash mode (a controllable fast flashing mode that can flash multiple times or dozens of times within 1 second) while meeting the ordinary dimming mode. However, most of the high-power power supplies on the market cannot achieve this function. In the flash mode, they become a breathing mode and cannot really change between on and off. Because the electrolytic capacitors at the input and output of the high-power power supply have a large capacity, they cannot be completely discharged in a short time. Even if a discharge resistor with a very small resistance is added, it will not only cause greater losses, but also fail to meet the demand for controllable fast flashing. A new high-power constant current controllable high-speed flashing LED dimming power supply is urgently needed to meet the higher market demands. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an isolated high-power constant-current controllable high-speed flashing LED dimming power supply.

[0004] An embodiment of the present invention solves the technical problem by adopting a technical solution: an isolated high-power constant-current controllable high-speed flashing LED dimming power supply, including a front-stage large-capacity electrolytic capacitor module, a DC-DC power conversion control module, a feedback module, a power supply module, a rear-stage large-capacity electrolytic capacitor module, a dimming circuit control module, an MCU module and a MOS tube Q801;

[0005] The input end of the DC-DC power conversion control module is connected to an external AC power supply, and the output end is connected to a subsequent large-capacity electrolytic capacitor module;

[0006] The power supply module is connected to the VBUS input and the output is connected to the VCC terminal for powering the DC-DC power conversion control module, the VCC-2 terminal for powering the dimming circuit control module, and the VDD terminal for powering the MCU module;

[0007] The dimming circuit control module is connected between the post-stage large-capacity electrolytic capacitor module and the feedback module;

[0008] The first output terminal of the MCU module is connected to the gate of the MOS tube Q801, the second output terminal of the MCU module is connected to the dimming circuit control module, the source of the MOS tube Q801 is connected to the dimming circuit control module, and the drain of the MOS tube Q801 is connected to one end of the LED;

[0009] When receiving the flashing signal, the MCU module can control the dimming circuit control module to shut down the energy output of the DC-DC power conversion control module and control the MOS tube Q801 to shut down, and after maintaining the set shutdown time, first turn on the MOS tube Q801 and then turn on the DC-DC power conversion control module for energy output.

[0010] As one of the preferred embodiments of the present invention, the DC-DC power conversion control module includes a MOS tube Q401, a MOS tube Q402, an inductor L401, a transformer T401, a capacitor C401, a capacitor C402, a capacitor C403, a resistor R401, a resistor R402, a resistor R403, a resistor R404, a resistor R405, a resistor R406, a diode D401, a diode D402, and a control chip U401;

[0011] The drain of the MOS tube Q401 is connected to VBUS, the gate of the MOS tube Q401 is connected to the MUPPER pin of the control chip U401 via the resistor R401, the source of the MOS tube Q401 is connected to the input end of the inductor L401 and the drain of the MOS tube Q402, and the resistor R402 is connected in parallel between the gate and the source of the MOS tube Q401; the drain of the MOS tube Q402 is connected to the input end of the inductor L401 and the source of the MOS tube Q401, the gate of the MOS tube Q402 is connected to the MLOWER pin of the control chip U401 via the resistor R403, the source of the MOS tube Q402 is connected to the GND end of the front-stage large-capacity electrolytic capacitor module, and the resistor R404 is connected in parallel between the gate and the source of the MOS tube Q402;

[0012] The output end of the inductor L401 is connected to the input end of the N1 winding of the transformer T401, the output end of the N1 winding of the transformer T401 is connected to one end of the capacitor C403, and the other end of the capacitor C403 is connected to the GND end of the previous large-capacity electrolytic capacitor through the resistor R405; the LLC CS pin of the control chip U401 is connected to the resistor R406 and the capacitor C402, and the other end of the resistor R406 is connected to the resistor R405 and the capacitor C403; the other end of the capacitor C402 is connected to the GND end; the N2 winding of the transformer T401 is connected to the subsequent large-capacity electrolytic capacitor module through the diode D401, and the N3 winding is connected to the diode D402, and the VCC pin of the control chip U401 is connected to one end and the VCC end of the capacitor C401; the other end of the capacitor C401 is connected to the GND end of the previous large-capacity electrolytic capacitor module and the power supply module, and the GND pin of the control chip U401 is connected to the GND end of the previous large-capacity electrolytic capacitor module and the power supply module.

[0013] As one of the preferred embodiments of the present invention, the feedback module includes an optocoupler U501, the anode and cathode of the optocoupler U501 light receiver are connected to the dimming circuit control module, the emitter of the light emitter is connected to the GND end of the front-stage large-capacity electrolytic capacitor module, and the collector of the light emitter is connected to the DC-DC power conversion control module.

[0014] As one of the preferred embodiments of the present invention, the dimming circuit control module includes a detection resistor RCS, a resistor R801, a resistor R802, a resistor R803, a resistor R804, a resistor R805, a resistor R806, a resistor R807, a diode D801, a diode D802 and a control chip U801;

[0015] The OUTPUT 1 pin of the control chip U801 is connected to the cathode of the diode D801, the INPUT 1- pin of the control chip U801 is connected to one end of the resistor R806 and the resistor R807, the other end of the resistor R806 is connected to the LED+ end, and the resistor R807 is connected to the S-GND end; the INPUT 1+NKA pin of the control chip U801 is connected to the VCC-2 end via the resistor R802, the GND pin of the control chip U801 is connected to the S-GND end, the INPUT 2+ pin of the control chip U801 is connected to one end of the resistor R803 and the resistor R804, the other end of the resistor R803 is connected to the S-GND end, and the other end of the resistor R804 is connected to the first output end of the MCU module; the INPUT 2- pin of the control chip U801 is connected to one end of the detection resistor RCS and the source of the MOS tube Q801 via the resistor R805; the OUTPUT Pin 2 is connected to the cathode of diode D802; the VCC pin of control chip U801 is connected to VCC-2 terminal, and the anode of diode D801 and the anode of diode D802 are connected to the feedback module.

[0016] As one of the preferred embodiments of the present invention, an isolated high-power constant-current controllable high-speed flashing LED dimming power supply also includes an EMC rectifier and filter module and a power factor correction module. The EMC rectifier and filter module is connected to an external AC power supply, the output end of the EMC rectifier and filter module is connected to the input end of the power factor correction module, and the output end of the power factor correction module is connected to the input end of the DC-DC power conversion control module.

[0017] The invention has the following beneficial effects: an isolated high-power constant-current controllable high-speed flashing LED dimming power supply, comprising a front-stage large-capacity electrolytic capacitor module, a DC-DC power conversion control module, a feedback module, a power supply module, a rear-stage large-capacity electrolytic capacitor module, a dimming circuit control module, an MCU module and a MOS tube Q801; the input end of the DC-DC power conversion control module is connected to an external AC power supply, and the output end is connected to the rear-stage large-capacity electrolytic capacitor module; the power supply module is connected to the VBUS input and the output is connected to the VCC end for powering the DC-DC power conversion control module, the VCC-2 end for powering the dimming circuit control module and the VDD end for powering the MCU module; the dimming circuit control module is connected between the rear-stage large-capacity electrolytic capacitor module and the feedback module; the MCU module The first output end is connected to the gate of the MOS tube Q801, the second output end of the MCU module is connected to the dimming circuit control module, the source of the MOS tube Q801 is connected to the dimming circuit control module, and the drain of the MOS tube Q801 is connected to one end of the LED; the MCU module can control the dimming circuit control module to shut down the energy output of the DC-DC power conversion control module and control the MOS tube Q801 to shut down when receiving the flashing signal, and after maintaining the set shutdown time, first turn on the MOS tube Q801 and then turn on the DC-DC power conversion control module to output energy; through the above circuit, the isolated high-power constant current power supply can also support the flashing mode in any dimming current segment, and can achieve multiple or dozens of controllable flashes within 1 second to meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a block diagram of an isolated high-power constant current controllable high-speed flashing LED dimming power supply;

[0020] Figure 2 This is a circuit schematic diagram of an isolated high-power constant current controllable high-speed flashing LED dimming power supply;

[0021] Figure 3 It is the circuit schematic diagram of the DC-DC power conversion control module;

[0022] Figure 4 It is a circuit schematic diagram of a dimming circuit control module;

[0023] Figure 5 This is the circuit schematic diagram of the feedback module. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0028] Reference Figures 1 to 5 A high-power constant-current controllable high-speed flashing LED dimming power supply includes an EMC rectifier filter module 10, a power factor correction module 20, a front-stage large-capacity electrolytic capacitor module 30, a DC-DC power conversion control module 40, a feedback module 50, a power supply module 60, a rear-stage large-capacity electrolytic capacitor module 70, a dimming circuit control module 80 and an MCU module 90;

[0029] Among them, the input end of the EMC rectifier and filter module 10 is connected to the external AC power supply, and the output end is connected to the input end of the power factor correction module 20; the output end of the power factor correction module 20 is connected to the front-stage large-capacity electrolytic capacitor module 30 and the input end of the DC-DC power conversion control module 40; the output end of the DC-DC power conversion control module 40 is connected to the rear-stage large-capacity electrolytic capacitor module 70, the VCC end of the DC-DC power conversion control module 40 is connected to the VCC end of the power supply module 60, and the COM end of the DC-DC power conversion control module 40 is connected to the C end of the feedback module 50.

[0030] The VBUS terminal of the power supply module 60 is connected to the VBUS network input, the VCC terminal of the power supply module 60 is connected to the VCC terminal of the power factor correction module 20 and the VCC terminal of the DC-DC power conversion control module 40; the VCC-2 terminal of the power supply module 60 is connected to the VCC-2 terminal of the dimming circuit control module 80, and the VDD terminal of the power supply module 60 is connected to the VDD terminal of the MCU module 90.

[0031] The VIN terminal and S-GND terminal of the dimming circuit control module 80 are connected to the two ends of the subsequent large-capacity electrolytic capacitor module 70, the ISEN terminal of the dimming circuit control module 80 is connected to one end of the power output LED, and the DIM1 terminal and DIM2 terminal of the dimming circuit control module 80 are respectively connected to the DIM1 terminal (first output terminal) and DIM2 terminal (second output terminal, the OUT terminal of the dimming circuit control module 80 is connected to the K terminal of the feedback module 50) of the MCU module 90.

[0032] In this example, if Figure 1-Figure 2 As shown, when the power supply is powered on, the power factor of the power supply network can be improved and harmonic interference can be reduced through the EMC rectifier and filter module 10, the power factor correction module 20 and the front-stage large-capacity electrolytic capacitor module 30, the power supply network can be improved and harmonic interference can be reduced, the power supply can reduce the external conducted radiation interference and improve its own anti-interference ability, the output DC voltage VBUS is used to supply the power supply module 60, the output VCC end is used to supply power to the power factor correction module 20 and the DC-DC power conversion control module 40, the output VCC-2 end is used to supply power to the dimming circuit control module 80, and the output VDD end is used to supply power to the MCU module 90.

[0033] Reference Figure 1-Figure 3As a preferred embodiment of the DC-DC power conversion control module 40, the DC-DC power conversion control module 40 includes a MOS tube Q401, a MOS tube Q402, an inductor L401, a transformer T401, a capacitor C401, a capacitor C402, a capacitor C403, a resistor R401, a resistor R402, a resistor R403, a resistor R404, a resistor R405, a resistor R406, a diode D401, a diode D402, and a control chip U401; the drain of the MOS tube Q401 is connected to VBUS, the gate of the MOS tube Q401 is connected to the MUPPER pin of the control chip U401 through the resistor R401, the source of the MOS tube Q401 is connected to the input end of the inductor L401 and the drain of the MOS tube Q402, and the resistor R401 is connected to the VBUS. 2 is connected in parallel between the gate and source of the MOS tube Q401; the drain of the MOS tube Q402 is connected to the input end of the inductor L401 and the source of the MOS tube Q401, the gate of the MOS tube Q402 is connected to the MLOWER pin of the control chip U401 through the resistor R403, the source of the MOS tube Q402 is connected to the GND end of the front-stage large-capacity electrolytic capacitor module 30, and the resistor R404 is connected in parallel between the gate and source of the MOS tube Q402; the output end of the inductor L401 is connected to the input end of the N1 winding of the transformer T401, the output end of the N1 winding of the transformer T401 is connected to one end of the capacitor C403, and the other end of the capacitor C403 is connected to the GND end of the front-stage large-capacity electrolytic capacitor through the resistor R405, forming a primary energy transfer circuit; LLC of the control chip U401 The CS pin is connected to resistor R406 and capacitor C402, and the other end of resistor R406 is connected to resistor R405 and capacitor C403; the other end of capacitor C402 is connected to the GND end; the N2 winding of transformer T401 senses the energy received and passes through the diode D401 for half-wave rectification, and the N3 winding senses the energy received and passes through the diode D402 for half-wave rectification and then is connected in parallel to the post-stage large-capacity electrolytic capacitor module 70, and the VCC pin of the control chip U401 is connected to one end of capacitor C401 and the VCC end; the other end of capacitor C401 is connected to the GND end of the previous stage large-capacity electrolytic capacitor module 30 and the power supply module 60, and the GND pin of the control chip U401 is connected to the GND end of the previous stage large-capacity electrolytic capacitor module 30 and the power supply module 60.

[0034] Reference Figure 1-Figure 2 , Figure 5 As a preferred embodiment of the feedback module 50, the feedback module 50 includes an optocoupler U501, the anode and cathode of the optocoupler U501 light receiver are connected to the dimming circuit control module 80, the emitter of the light emitter is connected to the GND end of the previous large-capacity electrolytic capacitor module 30, and the collector of the light emitter is connected to the DC-DC power conversion control module 40.

[0035] Reference Figure 1-Figure 2 , Figure 4As a preferred embodiment of the dimming circuit control module 80, the dimming circuit control module 80 includes a detection resistor RCS, a resistor R801, a resistor R802, a resistor R803, a resistor R804, a resistor R805, a resistor R806, a resistor R807, a diode D801, a diode D802 and a control chip U801; the OUTPUT 1 pin of the control chip U801 is connected to the cathode of the diode D801, the INPUT 1- pin of the control chip U801 is connected to one end of the resistor R806 and the resistor R807, the other end of the resistor R806 is connected to the LED+ end, and the resistor R807 is connected to the S-GND end; the INPUT 1+NKA pin of the control chip U801 is connected to the VCC-2 end via the resistor R802 to provide a reference voltage, which is connected to the INPUT 1 of the control chip U801. The detection voltage of the 1-pin is calculated and compared to limit the output voltage to meet the design value; the GND pin of the control chip U801 is connected to the S-GND terminal, the INPUT 2+ pin of the control chip U801 is connected to the resistor R803 and one end of the resistor R804, the other end of the resistor R803 is connected to the S-GND terminal, and the other end of the resistor R804 is connected to the first output terminal of the MCU module 90; the INPUT 2-pin of the control chip U801 is connected to one end of the detection resistor RCS and the source of the MOS tube Q801 through the resistor R805; the OUTPUT 2 pin of the control chip U801 is connected to the cathode of the diode D802; the VCC pin of the control chip U801 is connected to the VCC-2 terminal, and the anode of the diode D801 and the anode of the diode D802 are connected to the feedback module 50.

[0036] ① Normal dimming mode: MCU module 90 receives external signals to enter normal dimming mode, and outputs dimming signals through DIM1 terminal (first output terminal) and DIM2 terminal (second output terminal). DIM2 terminal outputs a signal to keep MOS tube Q801 in a normally on state, and DIM1 terminal outputs a dimming signal that meets the requirements and is given to pin 5 of control chip U801 through resistor R804 of dimming circuit control module 80. Pin 5 of control chip U801 is compared with the sampling value of pin 6, and a feedback signal is output through pin 7 of control chip U801 and is given to pin 2 of optocoupler U501 through diode D802. , through the isolated transmission signal control of the optocoupler U501, the 3-pin output feedback signal of the optocoupler U501 is given to the 6-pin of the control chip U401 through the capacitor C402 of the DC-DC power conversion control module 40, and the control chip U401 is adjusted internally. The MLOWER pin and MUPPER pin of the control chip U401 respectively control the on and off time of the MOS tube Q401 and the MOS tube Q402 of the DC-DC power conversion control module 40 through the resistor R403 and the resistor R401, and then control the energy transfer of the transformer T401 to the secondary, thereby realizing current adjustment and LED brightness change.

[0037] ② Strobe dimming mode: MCU module 90 receives an external signal to enter the strobe dimming mode, and the power output mode is: current "set current" → 0 current...current "set current" → 0 current, the output current presents a pulse shape of alternating 0 and "set current" and keeps circulating until a new instruction is received to jump out of the strobe dimming mode and enter a new mode; the control method of the "set current" state is the same as ① normal dimming mode. When jumping from the "set current" to the "0 current" state, the "0 current" control method is that the DIM1 terminal and the DIM2 terminal of the MCU module 90 simultaneously output a shutdown signal, and the shutdown signal of the DIM1 terminal is given to the INPUT of the control chip U801 through the resistor R804 of the dimming circuit control module 80. The sampling signal of the 2+ foot is compared with that of the 6th foot, and the control chip U801 generates a feedback information which is output from the 7th foot and given to the 2nd foot of the optocoupler U501 through the diode D802. The optocoupler U501 signal is isolated and transmitted to the 4th foot of the optocoupler U501, and then connected to the 7th foot of the control chip U401 in the DC-DC power conversion control module 40. After internal adjustment, the control chip U401 outputs shutdown signals at the MLOWER foot and the MUPPER foot, which respectively control the MOS tube Q401 and the MOS tube Q402 to be turned off through the resistor R401 and the resistor R403. The transformer T401 of the DC-DC power conversion control module 40 stops transmitting energy to the subsequent stage, and the subsequent stage energy is maintained by the subsequent stage large-capacity electrolytic capacitor module 70. At the moment when the DC-DC power conversion control module 40 stops transmitting energy, the voltage of the subsequent stage large-capacity electrolytic capacitor module 70 is still the same as the output terminal LED+ The voltages at both ends of LED- are consistent, and the LED light at the load end can still be kept on for a short time. At this time, after the MCU module 90 outputs a shutdown signal at the DIM1 end, the DIM2 end also immediately outputs a shutdown signal to the gate of the MOS tube Q801 to control the MOS tube Q801 to be disconnected, that is, after the DC-DC power conversion control module 40 stops energy transmission, the MOS tube Q801 is also immediately turned off, thereby cutting off the power supply of the LED load at one end of the output LED+ and LED by the subsequent large-capacity electrolytic capacitor module 70, and the current flowing through one end of the output LED+ and LED is 0; after maintaining the set shutdown output time, the output end outputs the "set current" again. The working logic is consistent with ① normal dimming mode, and this logic cycle is used; it should be noted that the light-on signal at the DIM1 end of the MCU module 90 should be slightly later than the light-on signal at the DIM2 end, and the shutdown signal at the DIM1 end of the MCU module 90 should be slightly earlier than the shutdown signal at the DIM2 end, which will improve the dimming effect and the stress of components.

[0038] The advantages of the present invention are that: through the above circuit, the isolated high-power constant current power supply can also support the flash mode in any dimming current segment, and can achieve multiple or dozens of controllable flashes within 1 second to meet the use requirements.

[0039] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An isolated high-power constant current controllable high-speed flashing LED dimming power supply, characterized by: It comprises a front-stage large-capacity electrolytic capacitor module (30), a DC-DC power conversion control module (40), a feedback module (50), a power supply module (60), a rear-stage large-capacity electrolytic capacitor module (70), a dimming circuit control module (80), an MCU module (90), and a MOS tube Q801; The input end of the DC-DC power conversion control module (40) is connected to an external AC power supply, and the output end is connected to the subsequent large-capacity electrolytic capacitor module (70); The power supply module (60) is connected to the VBUS input and the output is connected to the VCC terminal for supplying power to the DC-DC power conversion control module (40), the VCC-2 terminal for supplying power to the dimming circuit control module (80), and the VDD terminal for supplying power to the MCU module (90); The dimming circuit control module (80) is connected between the post-stage large-capacity electrolytic capacitor module (70) and the feedback module (50); The first output end of the MCU module (90) is connected to the gate of the MOS tube Q801, the second output end of the MCU module (90) is connected to the dimming circuit control module (80), the source of the MOS tube Q801 is connected to the dimming circuit control module (80), and the drain of the MOS tube Q801 is connected to one end of the LED; The MCU module (90) can control the dimming circuit control module (80) to shut down the energy output of the DC-DC power conversion control module (40) and control the MOS tube Q801 to shut down when receiving the flashing signal, and after maintaining a set shutdown time, first turn on the MOS tube Q801 and then turn on the DC-DC power conversion control module (40) to output energy.

2. According to claim 1, an isolated high-power constant current controllable high-speed flashing LED dimming power supply is characterized in that: The DC-DC power conversion control module (40) includes a MOS tube Q401, a MOS tube Q402, an inductor L401, a transformer T401, a capacitor C401, a capacitor C402, a capacitor C403, a resistor R401, a resistor R402, a resistor R403, a resistor R404, a resistor R405, a resistor R406, a diode D401, a diode D402, and a control chip U401; The drain of the MOS tube Q401 is connected to VBUS, the gate of the MOS tube Q401 is connected to the MUPPER pin of the control chip U401 via a resistor R401, the source of the MOS tube Q401 is connected to the input end of the inductor L401 and the drain of the MOS tube Q402, and the resistor R402 is connected in parallel between the gate and the source of the MOS tube Q401; the drain of the MOS tube Q402 is connected to the input end of the inductor L401 and the source of the MOS tube Q401, the gate of the MOS tube Q402 is connected to the MLOWER pin of the control chip U401 via a resistor R403, the source of the MOS tube Q402 is connected to the GND end of the front-stage large-capacity electrolytic capacitor module (30), and the resistor R404 is connected in parallel between the gate and the source of the MOS tube Q402; The output end of the inductor L401 is connected to the input end of the N1 winding of the transformer T401, the output end of the N1 winding of the transformer T401 is connected to one end of the capacitor C403, and the other end of the capacitor C403 is connected to the GND end of the large-capacity electrolytic capacitor of the previous stage through the resistor R405; LLC of the control chip U401 The CS pin is connected to a resistor R406 and a capacitor C402, and the other end of the resistor R406 is connected to a resistor R405 and a capacitor C403; the other end of the capacitor C402 is connected to a GND end; the N2 winding of the transformer T401 is connected to the post-stage large-capacity electrolytic capacitor module (70) via a diode D401, and the N3 winding is connected to the diode D402; the VCC pin of the control chip U401 is connected to one end and the VCC end of the capacitor C401; the other end of the capacitor C401 is connected to the GND ends of the pre-stage large-capacity electrolytic capacitor module (30) and the power supply module (60), and the GND pin of the control chip U401 is connected to the GND ends of the pre-stage large-capacity electrolytic capacitor module (30) and the power supply module (60).

3. According to claim 1, an isolated high-power constant current controllable high-speed flashing LED dimming power supply is characterized in that: The feedback module (50) comprises an optical coupler U501, wherein the anode and cathode of the optical receiver of the optical coupler U501 are connected to the dimming circuit control module (80), the emitter of the light emitter is connected to the GND end of the front-stage large-capacity electrolytic capacitor module (30), and the collector of the light emitter is connected to the DC-DC power conversion control module (40).

4. According to claim 1, an isolated high-power constant current controllable high-speed flashing LED dimming power supply is characterized in that: The dimming circuit control module (80) comprises a detection resistor RCS, a resistor R801, a resistor R802, a resistor R803, a resistor R804, a resistor R805, a resistor R806, a resistor R807, a diode D801, a diode D802 and a control chip U801; The OUTPUT 1 pin of the control chip U801 is connected to the cathode of the diode D801, the INPUT 1- pin of the control chip U801 is connected to one end of the resistor R806 and the resistor R807, the other end of the resistor R806 is connected to the LED+ end, and the resistor R807 is connected to the S-GND end; the INPUT 1+NKA pin of the control chip U801 is connected to the VCC-2 end via the resistor R802, the GND pin of the control chip U801 is connected to the S-GND end, the INPUT 2+ pin of the control chip U801 is connected to one end of the resistor R803 and the resistor R804, the other end of the resistor R803 is connected to the S-GND end, and the other end of the resistor R804 is connected to the first output end of the MCU module (90); the INPUT 2- pin of the control chip U801 is connected to one end of the detection resistor RCS and the source of the MOS tube Q801 via the resistor R805; the OUTPUT Pin 2 is connected to the cathode of diode D802; the VCC pin of control chip U801 is connected to VCC-2 terminal, and the anode of diode D801 and the anode of diode D802 are connected to the feedback module (50).

5. The isolated high-power constant-current controllable high-speed flashing LED dimming power supply according to claim 1, characterized in that: It also comprises an EMC rectifier and filter module (10) and a power factor correction module (20), wherein the EMC rectifier and filter module (10) is connected to an external AC power supply, the output end of the EMC rectifier and filter module (10) is connected to the input end of the power factor correction module (20), and the output end of the power factor correction module (20) is connected to the input end of the DC-DC power conversion control module (40).

Images