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TPS54331: TPS54331: TPS54331空载电压正常,负载输出电压低,急急急

Part Number: TPS54331

此颗芯片是DCDC芯片,贴片后测试时,不带负载的情况下,污水泵口输出12V;带上负载时,污水泵的口输出变低,输出电压只有4V(正常情况下12V)!需要原厂分析下,芯片带载能力弱的原因。之前用22年批次没有问题,换23年批次的出现上诉问题