This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

求助!TPS54560经常烧坏Vin脚,

Other Parts Discussed in Thread: TPS54560

TPS54560经常烧坏Vin脚,表现为Vin脚都烧没了,有时IVin上炸裂,批量有此问题,实在头疼,不知是何种问题导致。使用环境如下:DC36V转DC24V, 负载主要是伺服电机抱闸供电,电流为0.4A,还有一些其它的光耦三极管用,总电流为0.5A左右。IC损坏的时候都是伺服电机(600W)小车载重下坡的时候。小车供电和IC供电同是DC36V.   DC36V转24V的电源经过电阻2.5A老化两个小时没有什么问题,IC温度在45度范围。麻烦工程师们指点下,是何种问题导致损坏IC的。原理图如下: