Other Parts Discussed in Thread: TPS53681
Hi,Engineer:
We have a project using TPS53681+6*CSD95490;12V input,0.86V/ peak 300A output .
The equipment has been running for one year, but the CSD95490 was damaged(Cracking and VIN to PGND short), as shown in the figure below:
1、Please help to analyze the reason?
2、Please provide the calculation method of MTBF?
3、Three devices have had the same problem
We did the following test:
1、test condition:continuous output current=270A,TA=40℃,TJ=98℃.
2、Vsw to PGND test waveform(The Vsw overshoot is relatively high. We doubt whether the Vsw overshoot affects the life)?
Regards,
Shaocong