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LLC resonant converter is an attractive topology to achieve high power density with high efficiency. However, the high switching frequency and circulating current result the poor efficiency of a LLC resonant converter under light load condition. To improve efficiency further, a modified burst-mode control is implemented in the proposed controller. The switching frequency decreases gradually during...
In this paper, interleaved LLC half-bridge resonant converters are designed and implemented. In order to increase output power, two LLC resonant converters are parallel-connected. The gate driver signals of two LLC converters are interleaved by 90° to reduce output-current ripple. Besides, switch losses on power devices can be reduced by zero voltage switching (ZVS) and zero current switching (ZCS)...
In this paper, a half-bridge dual LLC converter with symmetrical autotransformer is proposed. The advantages of the proposed converter are that the dual LLC resonant tanks and symmetrical autotransformer can reduce the current stress of components, achieve high efficiency, and increase step-down conversion ratio and high power density. All active switches are turned on at ZVS and rectifier diodes...
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