A 200w led drive power supply circuit

Abstract

The present invention provides a 200W LED drive power circuit, which includes a strip-shaped PCB substrate packaged with the LED drive power circuit. The LED drive power circuit includes an EMI filter rectifier circuit, a Boost circuit, a Buck circuit, and a load circuit. The EMI filter and rectifier circuit is connected to the AC power supply. The Boost circuit is used to receive the signal rectified by the EMI filter and rectifier circuit and output a DC high voltage signal. The Buck step-down circuit is used to reduce the DC high voltage signal to a constant voltage and output it to A load circuit; wherein, a chip power supply circuit is also provided between the Boost voltage boosting circuit and the Buck voltage reduction circuit for providing power to the voltage reduction chip of the Buck voltage reduction circuit. The power supply circuit of the present invention is simple in design, can realize stable constant current output, has overvoltage protection function, and the output current can be adjusted according to the current required by the actual LED; The lighting range can be expanded.

Description

technical field [0001] The invention relates to the technical field of plant lighting, in particular to a 200W LED driving power supply circuit. Background technique [0002] With the widespread use of light-emitting diodes (LEDs), LEDs are also being used more and more in plant lighting and other lighting fields. They have the advantages of high efficiency, long life, small size, controllable spectrum and close-range irradiation. . [0003] However, the existing driving power supplies for various LED lamps have complex circuits, high cost, low cost performance, small lighting range, and it is difficult to achieve constant current output. [0004] In addition, the current mains voltage fluctuates greatly, and the existing LED energy-saving lamp drive power supply lacks overvoltage protection, so the LED energy-saving lamp is often damaged, which affects the service life of the LED energy-saving lamp. Contents of the invention [0005] The main purpose of the present inve...

AI Technical Summary

Problems solved by technology

[0003] However, the existing driving power supplies for various LED lamps have complex circuits, high cost, low cost performance, small lighting range, and it is difficult to achieve constant current output.

[0004] In addition, the current mains voltage fluctuates greatly, and the existing LED energy-saving lamp drive power supply lacks overvoltage protection, so it often causes damage to the LED energy-saving lamp and affects the service life of the LED energy-saving lamp

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