SG2548N

QUAD电源故障监视器 QUAD POWER FAULT MONITOR

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