SCC-based independent dimming multi-path light emitting diode (LED) driving circuit capable of current sharing
A technology of LED drive and independent dimming, which is applied in the direction of light source, electric light source, electrical components, etc., can solve the problems of high cost of current sharing accuracy, poor device balance characteristics, etc., and achieve low switching loss, low cost, simple and effective dimming Effect
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[0029] Such as figure 1 As shown, it is a SCC-based independent dimming multi-channel LED drive circuit based on SCC according to the present invention, including: a half-bridge inverter unit X connected to each other, a front-stage LLC resonant conversion network unit Y and a first adjustable Multi-channel LED current sharing drive unit Z controlled by the switch capacitor 1 and the second controllable switched capacitor controlled multi-channel LED current sharing drive unit Z 2 ; The multi-channel LED current equalization drive unit Z controlled by the first controllable switched capacitor 1 With the first current-sharing controllable switched capacitor SCC 1 ; The second controllable switched capacitor controlled multi-channel LED current equalization drive unit Z 2 With a second current-sharing controllable switched capacitor SCC 2 ;
[0030] The half-bridge inverter unit X includes: a first switch MOS transistor Q 1 , the second switch MOS tube Q 2 , the first cap...
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