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This paper proposes a Bang–Bang Charge Control (BBCC) method for LLC resonant converters. Instead of switching frequency control, the BBCC method utilizes the series resonant capacitor voltage level to trigger the MOSFETs’ switching actions. Advantages of the proposed method include fast dynamic performance and simple implementations. Small-signal analysis shows that the loop bandwidth can achieve...
This paper proposes a Bang-Bang Charge Control (BBCC) method for LLC resonant converters. It utilizes the series resonant capacitor to directly control the cycle-by-cycle input electric quantity, thus can provide very fast dynamic performance in all input and output conditions. The proposed method can be extended to other topologies that include a series capacitor.
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