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TPS40057无输出,BP10/BP5输出正常,SS/DRV无波形 [急...在线等



设计输入 24V 输出 12V (10A PEAK, 5A CON)

如题,所有引脚没有波形,芯片在另一模块上测试过,没有问题,焊接没有问题(尝试过三片板子,问题一样)。

电源部分原理图:(SS/SD已在板子上修复)

PCB图:(工艺: 双层 1.6mm 1Oz铜)