An isolated high-power LED drive power supply with multi-channel output current sharing and its realization method

A technology of LED drive and multi-channel output, which is applied in the direction of electric light source, electroluminescent light source, light source, etc., can solve the problems of increasing output voltage and reducing circuit reliability, and achieves simple circuit, improved current sharing accuracy, and current sharing high precision effect

Inactive Publication Date: 2018-07-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the series structure is used alone, the circuit is simple, but the output voltage will increase with the increase of the number of LEDs and reduce the reliability of the circuit. Therefore, high-power LED lighting beads often adopt a series-parallel structure

Method used

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  • An isolated high-power LED drive power supply with multi-channel output current sharing and its realization method
  • An isolated high-power LED drive power supply with multi-channel output current sharing and its realization method
  • An isolated high-power LED drive power supply with multi-channel output current sharing and its realization method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the drawings and embodiments.

[0039] This embodiment provides an isolated high-power LED drive power supply with multiple output current sharing, such as figure 1 As shown, it includes a half-bridge CLL resonant network, a current sharing network, and an LED lamp load circuit; the LED lamp load circuit includes 2N LED lamp loads; the half-bridge CLL resonant network implements the 2N circuit through the current sharing network Current sharing output of LED lamp load;

[0040] The current-sharing network includes a first transformer to an Nth transformer, a first current-sharing capacitor to a 2N-th current-sharing capacitor, and a first diode to a 2N-th diode; the primary winding of the first transformer to the primary of the Nth transformer The windings are connected in series;

[0041] One end of the secondary winding of the first transformer is connected to one end of the first current sharing capa...

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Abstract

The invention relates to an isolated high-power LED drive power supply with multi-channel output current equalization and its realization method. The drive power supply includes a half-bridge CLL resonant network, a current equalization network and an LED lamp load circuit. The LED lamp load circuit includes 2N circuits LED light load; the half-bridge CLL resonant network realizes the current equalization output of the 2N LED light loads through the current equalization network, wherein, N is a natural number greater than or equal to 2. The multi-output current-balancing drive circuit proposed by the present invention realizes four-way or any 2N-way equal or different numbers of LED loads by connecting the primary side windings of the transformer in series and combining them with the secondary side current-sharing capacitors of the transformer. Current output has the advantages of simple circuit, high efficiency and high precision of current sharing.

Description

Technical field [0001] The present invention relates to the field of LED driving power supplies, in particular to an isolated high-power LED driving power supply with multiple output current sharing and an implementation method thereof. Background technique [0002] With the rapid development of society and people's attention to energy consumption and the environment, the concept of energy saving and emission reduction has become more and more popular. The demand for lighting power is increasing, and it has become one of the key areas of energy saving and emission reduction. As a new generation of green lighting electric light source, LED is favored by its advantages such as long life, high luminous efficiency, energy saving and environmental protection, and has been widely used in high-power lighting occasions such as street lamps and tunnels. The performance of LED drive power directly affects the LED lighting system. [0003] The single power of LED is small, in order to meet ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 林国庆汪福林林羽静
Owner FUZHOU UNIV
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