CLOAD

RLOAD

CRAMP

CFLT

3

4

TPS2350

11

10

7

9

8

RTN

GAT

SENSE

SOURCE

GATA

GATB

–VINB

–VINA

RAMP

FLTTIM

OV

UV

–VINB

–VINA

Q1

1

5

6

14

13

12

PG

2

FLT

Power Good

Fault

RSENSE

0.01

D1

(A)

TPS2350

www.ti.com

SLUS574D – JULY 2003 – REVISED OCTOBER 2013

Hot Swap Power Manager for Redundant –48-V Supplies

Check for Samples: TPS2350

1

FEATURES

DESCRIPTION

•

Replaces OR-ing Diodes

The TPS2350 is a hot swap power manager

•

Operating Supply Range of –12 V to –80 V

optimized for replacing OR-ing diodes in redundant

•

Withstands Transients to –100 V

power –48-V systems. The TPS2350 operates with

supply voltages from –12 V to –80 V, and withstands

•

Programmable Current Limit

spikes to –100 V.

•

Programmable Linear Inrush Slew Rate

The TPS2350 uses two power FETs as low voltage

•

Programmable UV/OV Thresholds

drop

diodes

to

efficiently

select

between

two

•

Programmable UV and OV Hysteresis

redundant power supplies. This minimizes system

•

Fault Timer to Eliminate Nuisance Trips

power dissipation and also minimizes voltage drop

through the power management chain.

•

Power Good and Fault Outputs

•

14-Pin SOIC and TSSOP Package

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

APPLICATIONS

capacitor. The device also provides a power good

•

–48-V Distributed Power Systems

output to enable down-stream power converters and

•

Central Office Switching

a fault output to indicate load problems.

•

ONET

•

Base Stations

TYPICAL APPLICATION DIAGRAM

A.

D1 optional per application requirements.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.