Datasheet > SG2548

SG2548

更新时间： 2023-12-06 20:00:36

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
10页	401K
描述
The SG1548 is an integrated circuit capable of monitoring up to four positive DC supply voltages s

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SG2548 数据手册

SG1548

QUAD POWER FAULT MONITOR

Features

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 interruptions.

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

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

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.

High Reliability Features

Following are the high reliability features of SG1548:

Available to MIL-STD-883, ¶ 1.2.1

Radiation data available

MSC-AMS level "S" processing available

Block Diagram

Figure 1 · Block Diagram

December 2014 Rev. 1.3a

www.microsemi.com

12 3 4 5 6 7...10

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