200W LED driving power supply circuit

Abstract

The invention provides a 200W LED (light-emitting diode) driving power supply circuit. The circuit comprises a strip-shaped PCB (printed circuit board) substrate packaged with the LED driving power supply circuit, wherein the LED driving power supply circuit comprises an EMI (electro-magnetic interference) filtering and rectifying circuit, a Boost circuit, a Buck circuit and a load circuit, the EMI filtering and rectifying circuit is connected with an alternating-current power supply, the Boost circuit is used for receiving a signal rectified by the EMI filtering and rectifying circuit and outputting a direct-current high-voltage signal, the Buck circuit is used for reducing the voltage of the direct-current high-voltage signal into a constant voltage and outputting the constant voltage to the load circuit; a chip power supply circuit is also arranged between the Boost circuit and the Buck circuit and is used for providing a power supply for a buck chip of the Buck circuit. The power supply circuit is simple in design, stable constant current output can be achieved, the overvoltage protection function is achieved, and the output current can be adjusted according to the actual current needed by an LED; and the LED driving power supply adopts a long-strip-shaped design, and the lamp is made into a long strip shape, so the illumination 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...

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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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