SG2548J

更新时间： 2024-01-23 16:13:24

品牌	Logo	应用领域
美高森美 - MICROSEMI		监视器
页数	文件大小	规格书
4页	56K
描述
QUAD POWER FAULT MONITOR

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数据手册

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SG2548J 数据手册

SG1548/SG2548/SG3548

QUAD POWER FAULT MONITOR

DESCRIPTION

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 oscilla-

tions

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

dividernetworkonthe2.5Vreference. Asingleexternalcapacitorsets

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. 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.

• 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

BLOCK DIAGRAM

11/91 Rev 1.2 5/97

LINFINITY Microelectronics Inc.

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

12 3 4

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