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LM5143-Q1: interleaved switching operation

Part Number: LM5143-Q1

Hello,

while our customer tested LM5143-Q1 interleaved characteristics, he found a curious phenomenon, that is the duty cycle in Phase-B is much narrower on time than Phase-A. Especially in light load condition, Phase-B is fully off state but Phase-A is only switching.

Could you give us an idea how we can find out the reason and counter measure. If you faced similar experiences in the past, could you also suggest us any possible reason.

Best regards,