DESCRIPTION
●The SG1548 is an integrated circuit capable of monitoring up to four positive DC supply voltages simultaneously for overvoltage and undervoltage fault conditions. An on-chip inverting op amp also allows monitoring one negative DC voltage. The fault tolerance window is accurately programmable from ±5% to ±40% using a simple divider network on the 2.5V reference.
●FEATURES
●• Monitors four DC voltages and the AC line
●• Precision 2.5V ±1% low-drift reference
●• Fault tolerance adjustable from ±5% to ±40%
●• ±3% trip threshold tolerance over temperature
●• Separate 10mA, 40V overvoltage, undervoltage and AC line fault outputs
●• Fault delay programmable with a single capacitor
●• 30mV comparator hysteresis to prevent oscillations
●• On-chip inverting op amp for negative voltage
●• Open-collector output logic or expandability
●• Operation from 4.5V to 40V supply
