A Low Ripple LED Driver with Leakage Inductance Energy Recovery

A technology of LED driving and energy recovery, applied in the field of LED driving, can solve the problems of unfavorable converter efficiency, high voltage stress and consumption of switching tubes, etc., and achieve the effects of low-frequency ripple suppression, voltage stress reduction, and high application value

Active Publication Date: 2020-09-01
FUZHOU UNIV
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Problems solved by technology

[0004] Aiming at the problem of high voltage stress of switch tube in single-stage circuit topology, the traditional solution is to add RCD absorbing circuit to absorb the voltage peak energy caused by leakage inductance and reduce the voltage stress of switch tube, but the energy absorbed by RCD circuit is all consumed on the resistance , which is not conducive to the improvement of converter efficiency

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  • A Low Ripple LED Driver with Leakage Inductance Energy Recovery
  • A Low Ripple LED Driver with Leakage Inductance Energy Recovery
  • A Low Ripple LED Driver with Leakage Inductance Energy Recovery

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] 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.

[0036] 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 low-ripple LED drive power supply with leakage inductance energy recovery, comprising a rectifier circuit, an isolated interleaved parallel Boost-PFC circuit, a ripple compensation circuit and an LED load; the grid power supply is rectified by the rectifier circuit and isolated from the type interleaved parallel Boost-PFC circuit, the output of the isolated interleaved parallel Boost-PFC circuit is connected to the LED load; the ripple compensation circuit includes a flyback converter and a leakage inductance energy absorbing circuit; the leakage inductance The energy absorbing circuit is electrically connected with the isolated interleaved parallel Boost-PFC circuit for absorbing voltage spikes generated by transformer leakage inductance in the isolated interleaved parallel Boost-PFC circuit, and the output of the leakage inductance energy absorbing circuit passes through the The flyback converter is connected to the LED load to provide a ripple compensation signal for the LED load. The invention can not only suppress the low-frequency ripple on the output side, but also improve the conversion efficiency, and has high application value.

Description

technical field [0001] The invention relates to the technical field of LED driving, in particular to a low-ripple LED driving power supply with leakage inductance energy recovery. Background technique [0002] Light emitting diode (light emitting diode) is the fourth generation of lighting source after incandescent lamp, fluorescent lamp and high pressure gas discharge lamp. It has the advantages of high efficiency, long life, small size, rich colors, and dynamic control. Widely used in road, commercial and industrial fields. The driving power supply is the core component of LED lighting, and it is the key to ensure the luminous quality and overall performance of LED. [0003] In order to reduce the harmonic pollution introduced by the LED drive power supply to the power grid, the IEC 61000-3-2C regulations put forward restrictions on the harmonics of the input current of the LED general lighting driver, and require the LED lighting driver to have power factor correction fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/40H05B45/37H05B44/00
CPCH05B45/00
Inventor 林国庆苏锦文
Owner FUZHOU UNIV
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