tps54334

Using tps54334 to reduce 24V to 6V, the load current is relatively small, about 24Ma.

After four months of operation, the chips were burned down, with a rate of 30%.

The burning phenomenon is: all the SW pins are short circuited to the ground, even some boot pins or VIN pins are short circuited to the ground, and some PGOOD pins are short circuited to the ground.

The accessories are schematic diagram, PCB diagram and SW oscilloscope signal.

Johnsin Tao：

Hi另一个帖子已经回复，建议你将2个帖子合成一个。