12V转5V,VIN脚有11.56V,BOOT脚有7.08V,SW脚只有0.8V,
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Hi
空载测试,测试SW脚是否有方波震荡?
如果没有,检查一下芯片焊接,再不行就更换芯片。
你好,
检测一下BOOT电容。
空载的时候芯片和电感有没有严重发热。
请提供一下波形和原理图。
Hi
重新好好焊接一下,把layout传上来看一下?