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LED automatic current sharing driving circuit based on isolated CUK converter

A driving circuit and converter technology, applied in the direction of converting DC power input to DC power output, instruments, electric light sources, etc., can solve problems such as affecting the life of LED lamps, many power components, and two-way current imbalance, and achieve simple Convenient automatic current equalization effect

Inactive Publication Date: 2018-09-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, LED applications often require multi-channel parallel connection, of which two-channel parallel connection is the most common, and due to the difference in the process of LED itself, it is easy to cause the current imbalance of the two channels and affect the life of the LED lamp, so the current sharing technology is essential
At present, the main current sharing methods include active current sharing and passive current sharing. Among them, the switching converter has the disadvantages of many power components, complex control, and high cost; while the linear current regulator has the disadvantages of low efficiency. Suitable for high power applications

Method used

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  • LED automatic current sharing driving circuit based on isolated CUK converter
  • LED automatic current sharing driving circuit based on isolated CUK converter
  • LED automatic current sharing driving circuit based on isolated CUK converter

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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] Such as figure 1 As shown, this embodiment provides an LED automatic current sharing drive circuit based on an isolated CUK converter, including an input DC voltage source V s , input inductance L 1 , power MOS switch tube VT, capacitor C 1 , high frequency transformer T, current sharing capacitor C 2 , the first output inductance L 2 , the second output inductance L 3 , the first power diode VD 1 , the second power diode VD 2 , the first output filter capacitor C o1 , the second output filter capacitor C o2 , The first LED light group load LED string1 , the second LED light group load LED string2 ; The high-frequency transformer T is composed of the primary excitation winding N 1 , secondary output winding N 2 constitute; the input inductance L 1 the a 1 Terminal connected to the input DC voltage source V s The posi...

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Abstract

The invention relates to an LED automatic current sharing driving circuit based on an isolated CUK converter. The LED automatic current sharing driving circuit includes an input direct voltage sourceV<s>, an input inductor L<1>, a power MOS switching tube VT, a capacitor C<1>, a high-frequency transformer T, a current sharing capacitor C<2>, a first output inductor L<2>, a second output inductorL<3>, a first power diode VD<1>, a second power diode VD<2>, a first output filter capacitor C<o1>, a second output filter capacitor C<o2>, a first path of LED lamp group load LED<string1> and a second path of LED lamp group load LED<string2>. The multipath LED automatic current sharing driving circuit based on an isolated CUK converter is constructed, and thus functions of low ripples of input and output currents, automatic current sharing of multiple paths of LED loads and the like are realized.

Description

technical field [0001] The invention relates to the design field of LED lighting drive power supply, in particular to an LED automatic current equalization drive circuit based on an isolated CUK converter, which can be applied to multi-channel LED automatic current equalization drive circuits. Background technique [0002] At present, LED applications often require multi-channel parallel connection, of which two-channel parallel connection is the most common, and due to the difference in the process of LED itself, it is easy to cause the current imbalance of the two channels and affect the life of the LED lamp, so the current sharing technology is essential . At present, the main current sharing methods include active current sharing and passive current sharing. Among them, the switching converter has the disadvantages of many power components, complex control, and high cost; while the linear current regulator has the disadvantages of low efficiency. Suitable for high power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H02M3/335H02M1/14H05B44/00
CPCH02M1/14H02M3/33523H05B45/37
Inventor 林维明林如玉
Owner FUZHOU UNIV