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LED drive power supply employing non-isolated multi-path passive current balancing

A technology of LED drive and passive current sharing, which is applied in the direction of light sources, electric light sources, electrical components, etc., can solve the problems of high driving voltage and reduced reliability, and achieve the effect of simple circuit, good current sharing effect and high efficiency

Inactive Publication Date: 2016-07-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Connecting LEDs in series can ensure that their forward currents are equal, but too many LEDs in series will make the driving voltage too high and the reliability will be reduced. In practical applications, multiple strings of LEDs are usually connected in parallel to form high-power LED lighting fixtures

Method used

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  • LED drive power supply employing non-isolated multi-path passive current balancing
  • LED drive power supply employing non-isolated multi-path passive current balancing
  • LED drive power supply employing non-isolated multi-path passive current balancing

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Embodiment Construction

[0018] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0019] A non-isolated multi-channel passive current-sharing LED drive power supply of the present invention includes a half-bridge LCL resonant network, a current-sharing network and an LED lamp load circuit, and the LED lamp load circuit includes 2N LED lamp loads; the half-bridge The bridge LCL resonant network realizes the current sharing output of the 2N LED lamp loads through the current sharing network; the current sharing network includes the first to the second N capacitors, the first to the second N rectifier diodes, and the negative pole of the first rectifier diode It is connected to the anode of the second rectifier diode, and connected to the first output terminal of the half-bridge LCL resonant network through the first capacitor, and the anode of the first rectifier diode is connected to the first LED lamp load of the LED la...

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PUM

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Abstract

The invention relates to an LED drive power supply employing non-isolated multi-path passive current balancing. The LED drive power supply comprises a half-bridge LCL resonance network, a current balancing network and an LED lamp load circuit, wherein the LED lamp load circuit comprises 2N paths of LED lamp loads; the half-bridge LCL resonance network achieves current balancing output of the 2N paths of LED lamp loads through the current balancing network; and N is a natural number greater than or equal to 2. 2N paths of passive current balancing output circuits based on the half-bridge LCL resonance network can achieve current balancing output for four paths or any 2N paths of LED lamp loads which are the same or different in quantity. The LED drive power supply has the advantages of being simple in structure, high in efficiency, good in current balancing effect and the like.

Description

technical field [0001] The invention relates to a non-isolated multi-channel passive current sharing LED driving power supply. Background technique [0002] In recent years, the current situation of energy shortage has made human beings increasingly aware of the importance of energy conservation and emission reduction. As a new type of lighting source, LED has the advantages of long life, energy saving and environmental protection, and is gradually favored by people, and has become the focus of attention in the lighting field. The efficient and reliable LED drive power supply is the key to the rapid development of LED lighting. [0003] The driving power supply is the power source of the LED. Its forward current determines the optical performance indicators such as the brightness, luminous flux and luminous efficiency of the LED, and the exponential relationship between its forward voltage and forward current makes a small voltage fluctuation lead to a large current change...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/48Y02B20/30
Inventor 林国庆林羽静
Owner FUZHOU UNIV
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