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BQ24610给6串充电时,电流4~7A,高端Q6和电感L1发烫严重

Other Parts Discussed in Thread: BQ24610

如题,BQ24610给6串充电时,电流4~7A,高端Q6和电感L1发烫严重,还有吱吱声。

其中L1用的是3.3μH贴片电感,Q6是FDD8444(Rds_on约8mΩ),跟参考电路差不多。也都加了小散热片。

充电适配器是27V,测得Q6占空比很高95%。

高端Q6和电感L1发烫到手不能碰。这个正常码?

请问专家这会是什么原因?