TPS2350 Datasheet, PDF (1/21 Pages) Texas Instruments – HOT SWAP POWER MANAGER FOR REDUNDANT-48-V SUPPLIES

TPS2350
SLUS574A − JULY 2003 − REVISED SEPTEMBER 2003
HOT SWAP POWER MANAGER FOR REDUNDANT -48ĆV SUPPLIES
FEATURES
D Replaces OR-ing Diodes
D Operating Supply Range of −12 V to −80 V
D Withstands Transients to –100 V
D Programmable Current Limit
D Programmable Linear Inrush Slew Rate
D Programmable UV/OV Thresholds
D Programmable UV and OV Hysteresis
D Fault Timer to Eliminate Nuisance Trips
D Power Good and Fault Outputs
D 14-Pin SOIC and TSSOP Package
APPLICATIONS
D −48-V Distributed Power Systems
D Central Office Switching
D ONET
D Base Stations
TYPICAL APPLICATION DIAGRAM
DESCRIPTION
The TPS2350 is a hot swap power manager
optimized for replacing OR-ing diodes in
redundant power −48-V systems. The TPS2350
operates with supply voltages from −12 V to
−80 V, and withstands spikes to −100 V.
The TPS2350 uses two power FETs as low
voltage drop diodes to efficiently select between
two redundant power supplies. This minimizes
system power dissipation and also minimizes
voltage drop through the power management
chain.
The TPS2350 also uses a third power FET to
provide load current slew rate control and peak
current limiting that is programmed by one resistor
and one capacitor. The device also provides a
power good output to enable down-stream power
converters and a fault output to indicate load
problems.
RLOAD
Power Good
Fault
3 UV
12 PG
2 _FLT
1
RTN
TPS2350
GAT 11
SENSE 10
SOURCE ⁷
4 OV
FLTTIM RAMP
5
6
GATA 9
GATB 8
−VINA −VINB
14 13
CFLT CRAMP
CLOAD
Q1
RSENSE
0.01 Ω
−VINB
−VINA
UDG−03125
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2003, Texas Instruments Incorporated
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