What is the PWM duty cycle range in LLC Resonant Converter Design Using MC56F82748？

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What is the PWM duty cycle range in LLC Resonant Converter Design Using MC56F82748（DRM172）？

Can it be less than 0.25 ？

[xiangjun_rong · Accepted solution]

Hi, Zhang,

In order to guarantee the ZVS feature, the duty cycle should range from 30% to 50%.

Pls refer to the note in DRM172

"In order to ensure ZVS, the duty cycle can’t be too small. This reference chooses 0.3 as the minimum duty cycle."

Hope it can help you

BR

XiangJun Rong