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TPS2350 Datasheet

  • TPS2350

  • 冗余 -48V 電源的熱插拔電源管理器

  • 22頁(yè)

  • TI

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TPS2350
SLUS574A 鈭?JULY 2003 鈭?REVISED SEPTEMBER 2003
HOT SWAP POWER MANAGER FOR REDUNDANT -48 V SUPPLIES
FEATURES
D
Replaces OR-ing Diodes
D
Operating Supply Range of 鈭?2 V to 鈭?0 V
D
Withstands Transients to 鈥?00 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
鈭?8-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 鈭?8-V systems. The TPS2350
operates with supply voltages from 鈭?2 V to
鈭?0 V, and withstands spikes to 鈭?00 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
1
3
Power Good
Fault
12
2
UV
PG
FLT
SOURCE
4
GATA
OV
GATB
FLTTIM
5
RAMP
6
鈭扸INA 鈭扸INB
14
13
鈭扸INB
CFLT
CRAMP
鈭扸INA
UDG鈭?3125
CLOAD
GAT 11
Q1
RSENSE
0.01
鈩?/div>
RTN
TPS2350
SENSE 10
7
9
8
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.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
www.ti.com
1

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