Patent ID: 11949224
Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A power supply system comprising:
a power regulator to operate in voltage-limit mode and to generate an output voltage;
an instantaneous overvoltage sensor configured to detect an overvoltage condition associated with the output voltage; and
an overvoltage latch-off timer system comprising:
a latch-off timer circuit configured to initiate a latch-off timer in response to detecting the overvoltage condition, the latch-off timer being uninterrupted by an amplitude of the output voltage; and
a finite state machine (FSM) controller system configured to detect a persistent overvoltage fault in response to detecting the overvoltage condition after expiration of the latch-off timer and to generate a fault signal to disable the voltage-limit power regulator in response to detecting the persistent overvoltage fault, and to detect a nuisance overvoltage condition in response to not detecting the overvoltage condition after expiration of the latch-off timer and before expiration of a nuisance overvoltage timer.