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SG3548, SG35480DW, SG3548BN

Table of contents:
Info of SG3548
Info of SG35480DW
Info of SG3548BN

SG3548, SG35480DW, SG3548BN Selling Leads, Datasheet

MFG:LINFINITY Package Cooled:SMD D/C:07/08+

SG3548, SG35480DW, SG3548BN Datasheet download

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Part Number: SG3548

MFG: LINFINITY

Package Cooled: SMD

D/C: 07/08+

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SG3548 General 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. 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.

SG3548 Maximum Ratings

Supply Voltage (+V_IN) ........................................40V
Fault Output Collector Voltage ...........................40V
Sense Input Voltage Range .................-0.3V to 6.0V
Fault Output Sink Current ................................20mA
Line Sense Input Current ...............................±1mA
Inverting Op Amp Input Current .......................-5mA
Inverting Op Amp Output Current ....................25mA
Operating Junction Temperature
Hermetic (J, L Packages) ..................................150
Plastic (N, DW Packages) .................................150
Storage Temperature Range ..............-65 to 150
Lead Temperature ...........................................300

Note 1. Values beyond which damage may occur.

SG3548 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 oscillations
· On-chip inverting op amp for negative voltage
· Open-collector output logic or expandability
· Operation from 4.5V to 40V supply

SG3548 Connection Diagram

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