SG2548 Microsemi Corporation, SG2548 Datasheet

SG2548

Manufacturer Part Number

SG2548

Description

Manufacturer

Microsemi Corporation

Datasheets

1.SG2548.pdf (4 pages)

2.SG2548.pdf (4 pages)

Specifications of SG2548

Case

SOP

Date_code

2005

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Download datasheet (53Kb)

11/91 Rev 1.2 5/97

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. 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 interrup-

tions. An additional comparator referenced to 2.5V allows the AC line

to be monitored for undervoltage conditions or for generation of a line

clock.

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.

BLOCK DIAGRAM

1997

The comparator can also be used for programmable

QUAD POWER FAULT MONITOR

FEATURES

HIGH RELIABILITY FEATURES - SG1548

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 oscilla-

tions

On-chip inverting op amp for negative voltage

Open-collector output logic or expandability

Operation from 4.5V to 40V supply

Available to MIL-STD-883

Radiation data available

LMI level "S" processing available

SG1548/SG2548/SG3548

11861 Western Avenue

INFINITY Microelectronics Inc.

(714) 898-8121

Garden Grove, CA 92841

FAX: (714) 893-2570

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