Other Parts Discussed in Thread: LM5050-2,
Hi Team,
Customer is using device in multiple boards and these boards are connected to system back plane. LM5064 hot swap controller is used for 48V feed. Connection flow is Backplane Connector---> EMI Filter (Murata- BNX023-01L)--->LM5050-2 Based Active Oring FET controller--->LM5064 Hotswap controller
LM5064 turns off the output voltage and restarts when another card of the same type is inserted to back plane. Fault logs indicates IIN_OC/PFET_OP_FAULT bit in the DIAGNOSTIC_WORD (E1h) register.
We monitored over current and power limit but could not see any evidence of input over current or power limit being crossed on the feed from back plane. Further analysis done with few other tests, observed that if the EMI filter is removed, IIN_OC FAULT is not reported. We tested and observed for UV/OV did not see any alarms corresponding to UVLO and OVLO during failure.
Please help with your quick inputs to analyse and rectify this issue.
Regards, Shinu Mathew.