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Capacitive Current Balancing for Parallel-connected LED Strings with Tight Load-Regulation by Switch-Controlled Capacitor
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| Author(s) |
Chi Shing WONG |
| Abstract |
This paper proposes a capacitive current balancing method for multistring LED lighting system driven bya LCC resonant converter. Different from conventional current balancing methods, this method replacesthe capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltagecan be regulated by modulating the frequency of the resonant tank instead of the switching frequency ofthe converter. As a result, LED currents can be balanced and maintained to a desired value even for wideload and input voltage variations. A 70-W LCC resonant converter is built to validate the method. |
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| Filename: | 0214-epe2016-full-13324561.pdf |
| Filesize: | 2.102 MB |
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| Type |
Members Only |
| Date |
Last modified 2017-04-13 by System |
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