A single-stage bridgeless boost cuk resonant led drive circuit

A technology of LED driving and resonant capacitors, which is applied to the conversion equipment, electrical components, and adjustment of electrical variables of Cuk converters. It can solve the problems of low efficiency, large pulsation, and large voltage stress of intermediate energy storage capacitors, etc., to improve conversion High efficiency, small current ripple, and reduced conduction loss

Inactive Publication Date: 2021-06-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the traditional Boost type single-stage power factor correction converter, there are still disadvantages such as low efficiency and large voltage stress of the intermediate energy storage capacitor. When PFC and regulator, its pulsation is bigger

Method used

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  • A single-stage bridgeless boost cuk resonant led drive circuit
  • A single-stage bridgeless boost cuk resonant led drive circuit
  • A single-stage bridgeless boost cuk resonant led drive circuit

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0025] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a single-stage bridgeless boost Cuk resonant LED drive circuit, comprising a bridgeless boost Cuk circuit unit and an LLC circuit unit, wherein a lower switch tube in the LLC circuit unit and a bridgeless boost Cuk circuit unit The switch tubes share a power switch tube, and the bridgeless boost Cuk circuit and the LLC circuit are integrated into a single-stage AC-DC drive circuit by multiplexing the power switch tube. where the input AC power supply V in , power diode D 1 ~D 6 and D 8 , inductance L 1 , L 2 and L 3 , the intermediate capacitor C 1 and C 2 , bus capacitance C bus , the second power switch tube S 2 Constitute a bridgeless boost Cuk circuit unit; power diode D 7 , D9‑D 12 , Power switch tube S 1 , S 2 , resonant inductance L r , resonant capacitor C r , high frequency transformer T with center tap on secondary side, output capacitor C 0 It constitutes an LLC circuit unit. The invention realizes the bridgeless single-stage PFC circuit and the ZVS soft switching through the multiplexing of the bridgeless boosting Cuk PFC circuit and the LLC circuit switch tube, and reduces the conduction loss and switching loss of the main circuit of the converter.

Description

technical field [0001] The invention relates to the technical field of LED lighting driving, in particular to a single-stage bridgeless boost Cuk resonant LED driving circuit. Background technique [0002] In recent years, with the increasing awareness of green environmental protection, energy saving and emission reduction and the rapid development of semiconductor technology, light emitting diodes have been widely used. Compared with traditional electric light sources, LED electric light sources have the advantages of low energy consumption, long life, green environmental protection, and high light efficiency. LED is a cold light source driven by constant current. Its performance is restricted by the conditions of use and the performance of the driver. Designing LED drive circuits with different structures for different applications can reduce power loss, improve energy conversion efficiency and luminous efficiency, and can also To reduce the heat generation of the LED sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M3/00H02M1/42H05B45/30
CPCH02M1/4241H02M3/005H02M3/335H05B45/30H02M1/0058Y02B20/30Y02B70/10
Inventor 林维明林见文
Owner FUZHOU UNIV
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