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A family of DC/DC step-down converters with quadratic voltage transformation rate with only one low-side active switch is presented. The most promising topology using coupled inductors with pronounced step-down ratio is analyzed in detail. The circuit is especially useful for higher input voltages when diodes are used, which have lower losses than the active switch. The current and voltage waveforms...
This paper proposes a family of simple, precise and lossless current balancing methods based on charge balancing for multi-output LED strings application. A capacitor is in series with the transformer secondary side to block the output DC voltage difference, and the output current balancing can be achieved by capacitor charge balancing. Compared to the conventional active current sharing technique...
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