Other Parts Discussed in Thread: CSD18502KCS, CSD18502Q5B
We use the TPS92641 for LED driver chip, the vin is 24V and the LED Vf is 4.6V, LED current is 30A.
In current design the MOSFETs of both high side and low side are two CSD18502 parallel.
After we run this TPS92641 LED driver BD around 800 hours, the both high side MOSFET are failed and the resistance between drain and source is shorted.
The schematic is as below, the original MOSFETs are CSD17501, we use the CSD18502 to instead of CSD17501 because of Vds rating.
Please help us to figure out this problem.