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TPS54331在25V电源输入时的故障(烧坏)

Other Parts Discussed in Thread: TPS54331

TPS54331,电源输入由PMOS控制,输入为6S锂电池,最高25.2V。在MOS管打开瞬间,芯片烧坏,烧毁点位于芯片的电源脚输入附近。芯片前输入电容为
68uF/35V电解电容,两个4.7uF/50V的陶瓷电容和一个0.01uF/50V的陶瓷电容。电路如图所示。