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SG2543J 参数 Datasheet PDF下载

SG2543J图片预览
型号: SG2543J
PDF下载: 下载PDF文件 查看货源
内容描述: 电源输出监控电路 [POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT]
分类和应用: 电源电路电源管理电路输出元件监控
文件页数/大小: 6 页 / 121 K
品牌: MICROSEMI [ MICROSEMI CORPORATION ]
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SG1543/SG2543/SG3543
POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT
DESCRIPTION
This monolithic integrated circuit contains all the functions necessary to monitor and
control the output of a sophisticated power supply system. Over-voltage (O.V.) sensing
with provision to trigger an external SCR “crowbar” shutdown; an under-voltage (U.V.)
circuit which can be used to monitor either the output or to sample the input line voltage;
and a third op amp/comparator usable for current sensing (C.L.) are all included in this
IC, together with an independent, accurate reference generator.
Both over and under-voltage sensing circuits can be externally programmed for mini-
mum time duration of fault before triggering. All functions contain open collector outputs
which can be used independently or wire-ORed together; and although the SCR trigger
is directly connected only to the over-voltage sensing circuit, it may be optionally
activated by any of the other outputs, or from an external signal. The O.V. circuit also
includes an optional latch and external reset capability.
The current sense circuit may be used with external compensation as a linear amplifier
or as a high gain comparator. Although nominally set for zero input offset, a fixed
threshold may be added with an external resistor. Instead of current limiting, this circuit
may also be used as an additional voltage monitor.
The reference generator circuit is internally trimmed to eliminate the need for external
potentiometers and the entire circuit may be powered directly from either the output being
monitored or from a separate bias voltage.
FEATURES
Over-voltage, under-voltage, and
current sensing circuits all
included
Reference voltage trimmed to 1%
accuracy
SCR "Crowbar" drive of 300mA
Programmable time delays
Open-collector outputs and
remote activation capability
Total standby current less than
10mA
HIGH RELIABILITY FEATURES
- SG1543
Available to MIL-STD-883 and
DESC SMD
LMI level "S" processing avail-
able
BLOCK DIAGRAM
11/91 Rev 1.1 2/94
Copyright
©
1994
1
11861 Western Avenue
Garden Grove, CA 92841
(714) 898-8121
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.