Microchip SG2548N

电源，监控器4.5V ~ 40V4.8 mA

Overview

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. A single external capacitor sets the fault indication delay, eliminating false outputs due to switching noise, logic transition current spikes, and short-term AC line interruptions. An additional comparator referenced to 2.5V allows the AC line to be monitored for undervoltage conditions or for generation of a line clock. The comparator can also be used for programmable undervoltage lockout in a switching power supply. Uncommitted collector and emitter outputs permit both inverting and non-inverting operation. External availability of the precision 2.5V reference and open-collector logic outputs permit expansion to monitor additional voltage using available open-collector quad comparators.

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 HIGH RELIABILITY FEATURES - SG1548 ♦ Available to MIL-STD-883 ♦ Radiation data available ♦ LMI level "S" processing available

Features

Tube Package
Power Supply, Supervisor Applications
4.5V ~ 40V Voltage - Supply
4.8 mA Current - Supply
Through Hole Mounting Type