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TPS54331: 低温启动

Part Number: TPS54331

如波形图,CH3是输入,ch4是输出,输入12V,输出5.2,在低温-40度启动时,输出电压波形正常吗

  • HI

         虽然没有测试过-40℃下的波形,但是从上面看是有问题的。

         建议你将SS电容,boot电容都适当加大一些,看能否改善?

         如果没有改善,建议你确认一下layout,建议严格参照datasheet推荐,因为从波形看启动瞬间有不稳定的电流限制。