Other Parts Discussed in Thread: LM5170, TIDA-01168
Hello.
Please tell me about the failure detection of LM5170.
Used in 4-phase buck converter (48V-> 14V).
The circuit diagram is TIDA-01168.
Connecting a 10k resistor to SYNCOUT will work fine.
MOS is not damaged.
However, it will not work if you remove the 10k resistor.
After checking the waveform, nFAULT goes high for about 3 milliseconds at startup,It will be lower soon.
Even if UVLO changes from HI to LOW to HI, nFAULT simply repeats the above.
Are you using it incorrectly?
Thank you.