TPS2350_15 Datasheet, PDF (1/27 Pages) Texas Instruments – Hot Swap Power Manager for Redundant –48-V Supplies

TPS2350
www.ti.com
SLUS574D – JULY 2003 – REVISED OCTOBER 2013
Hot Swap Power Manager for Redundant –48-V Supplies
Check for Samples: TPS2350
FEATURES
1
• Replaces OR-ing Diodes
• Operating Supply Range of –12 V to –80 V
• Withstands Transients to –100 V
• Programmable Current Limit
• Programmable Linear Inrush Slew Rate
• Programmable UV/OV Thresholds
• Programmable UV and OV Hysteresis
• Fault Timer to Eliminate Nuisance Trips
• Power Good and Fault Outputs
• 14-Pin SOIC and TSSOP Package
APPLICATIONS
• –48-V Distributed Power Systems
• Central Office Switching
• ONET
• Base Stations
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.
TYPICAL APPLICATION DIAGRAM
Power Good
Fault
(A)
D1
3 UV
12 PG
2 FLT
1
RTN
TPS2350
GAT 11
SENSE 10
SOURCE ⁷
4 OV
GATA 9
GATB 8
FLTTIM RAMP –VINA –VINB
5
6
14
13
CFLT
CRAMP
A. D1 optional per application requirements.
RLOAD
CLOAD
Q1
RSENSE
0.01
–VINB
–VINA
1
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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