SG3543N Microsemi Analog Mixed Signal Group, SG3543N Datasheet

IC POWER SUPPLY SUPERVISOR 16DIP

SG3543N

Manufacturer Part Number
SG3543N
Description
IC POWER SUPPLY SUPERVISOR 16DIP
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet

Specifications of SG3543N

Applications
Power Supply, Supervisor
Voltage - Supply
4.5 V ~ 40 V
Current - Supply
7mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
16-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SG3543N
Manufacturer:
NS
Quantity:
6 226
Rev 1.1a 3.19.2005
Copyright
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.
BLOCK DIAGRAM
1994
POWER SUPPLY OUTPUT SUPERVISORY CIRCUIT
1
SG1543/SG2543/SG3543
FEATURES
HIGH RELIABILITY 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
- SG1543
Available to MIL-STD-883 and
DESC SMD
LMI level "S" processing avail-
able
11861 Western Avenue
(714) 898-8121
Garden Grove, CA 92841
FAX: (714) 893-2570
Microsemi Inc.

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SG3543N Summary of contents

Page 1

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 ...

Page 2

ABSOLUTE MAXIMUM RATINGS Input Supply Voltage (+V )................................................. IN Sense Inputs ...................................................................... SCR Trigger Current ......................................... (Note 2) Indicator Output Voltage ..................................................... Note 1. Values beyond which damage may occur. Note 2. At higher input voltages, a dissipation limiting resistor, ...

Page 3

ELECTRICAL CHARACTERISTICS Parameter Comparator Section Input Threshold (Note 5) Input Hysteresis Input Bias Current Delay Saturation Delay High Level Delay Charging Current Indicate Saturation Indicate Leakage Propagation Delay SCR Trigger Section Peak Output Current Peak Output Voltage Output Off Voltage ...

Page 4

CHARACTERISTIC CURVES (continued) FIGURE 3. COMPARATOR INPUT HYSTERESIS FIGURE 5. CURRENT LIMIT AMPLIFIER GAIN APPLICATION INFORMATION FIGURE 7 - SURGE LIMIT CIRCUIT FOR LARGE DELAY CAPACITORS The 100 ohm resistor limits the peak discharge current into the SG1543 while the ...

Page 5

APPLICATION INFORMATION FIGURE 9 - TYPICAL APPLICATION CIRCUIT Rev 1.1a Copyright 1994 (continued) FIGURE 10 - SENSING MULTIPLE SUPPLY VOLTAGES FIGURE 11 - OVERCURRENT SHUTDOWN 5 The values for the external components are determined as follows: 1000 Current limit input ...

Page 6

... Package Part No. 16-PIN CERAMIC DIP SG1543J/883B J - PACKAGE SG1543J/DESC SG1543J SG2543J SG3543J 16-PIN PLASTIC DIP SG2543N N - PACKAGE SG3543N 16-PIN WIDE BODY SG2543DW PLASTIC S.O.I.C. SG3543DW DW - PACKAGE 20-PIN CERAMIC SG1543L/883B LEADLESS CHIP CARRIER SG1543L L- PACKAGE (Note 3) Note 1. Contact factory for JAN and DESC product availablity. ...

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