Drive circuit of LED illumination lamp

Abstract

The invention relates to a drive circuit of an LED illumination lamp, comprising an alternating-current filter unit, a rectifying unit and a DC / DC conversion unit which are sequentially connected, wherein the input end of the alternating-current filter unit is used for connecting with a commercial power supply, and the DC / DC conversion unit is used for connecting with an LED illumination lamp. The drive circuit of an LED illumination lamp can be directly driven by the commercial power supply to supply electricity to the LED illumination lamp, converts the electric energy of the commercial power supply into driving electric energy which is suitable for the LED illumination lamp, and is suitable for the LED illumination lamp with large-range power. According to tests, the drive circuit of an LED illumination lamp can be used for driving the LED illumination lamp with the electric power as small as 10 to 100 watts or as big as 500 to 1000 watts or even as big as tens of thousands of kilowatts; and in addition, the drive circuit of an LED illumination lamp converts the electric energy of the commercial power supply into excellent constant-voltage constant-current electric energy, the light intensity of the driven LED illumination lamp is steady and soft and no twinkling feeling appears, and the service life of the LED illumination lamp can be prolonged.

Description

Technical field [0001] The present invention relates to the technical field of LED lighting lamp driving, in particular to a high-power LED lighting lamp driving circuit. Background technique [0002] At present, LED lamps are superior to other light sources due to their long life, high efficiency, and no pollution. It is being promoted and applied in large-scale lighting fields such as street lamps, but LED lamps require high-quality low-voltage, and city electricity cannot be used directly. When 220V mains power is used, processing such as step-down, rectification, and filtering is required. There are already many patents for 220V AC LED lamp drive circuits, such as: [0003] 200510013232.1, "Drive Circuit for 220V AC LED Lights"; [0004] 01252414.X, "LED Lighting Driver"; [0005] 00255776.2, "LED ultra-wide-range voltage driver"; [0006] 03254582.7, "LED Lighting Driver"; [0007] 03252283.5, "A structure improvement of LED drive circuit"; [0008] 200420024504.9 "AC powere...

AI Technical Summary

Problems solved by technology

[0009] In addition, there are specially designed LED lamp driving integrated circuits; and these circuits have the disadvantages of complex design, low efficiency, high cost, and poor reliability.

For example, some use capacitors and resistors to step down and rectify, the output current is unstable, the reliability is poor, and the efficiency is low; some circuits are complex, the price is high, and the reliability is poor; ; The current LED lighting driving technology is only suitable for low-power LED lights with a power range of 0~10W, which is not conducive to the large-scale promotion and application of LED lights

At present, there is no drive device for high-power LED lighting with a power greater than 10W on the market

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