TPS2398

TPS2399

SLUS562A − JUNE 2003 − REVISED SEPTEMBER 2003

-48V HOT SWAP CONTROLLER

FOR REDUNDANT SUPPLY SYSTEMS

1

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FEATURES

DESCRIPTION

The TPS2398 and TPS2399 integrated circuits

are hot swap power managers optimized for use

in nominal −48-V systems. For redundant-supply

systems, they incorporate an improved circuit

breaker response that provides rapid protection

from short circuits, while still enabling plug-ins to

tolerate large transients that can be generated by

the sudden switchover to a higher voltage supply.

They are designed for supply voltage ranges up to

−80 V, and are rated to withstand spikes to −100 V.

In conjunction with an external N-channel FET

and sense resistor, they can be used to enable live

insertion of plug-in cards and modules in powered

systems. Both devices provide load current slew

rate

and

peak

magnitude

limiting,

easily

programmed by sense resistor value and a single-

external capacitor.

APPLICATION DIAGRAM

UDG−03069

COUT

VDD

R1

0.02

Ω

1%

C1

0.047

µF

R3

30 k

Ω

0.5 W

R2

100 k

Ω

1

2

8

5

RTN

EN

+

−VIN

GATE

ISENS

−48V_INA

TPS2398/TPS2399

3

FLTTIME

4

IRAMP

6

7

C2

3900 pF

VOUT+

VIN+

VOUT−

DC/DC CONVERTER

VIN−

VOUT+

VOUT−

+

D1

D2

−48V_INB

−48V_RTN

Q1

IRF530

C3

100

µF

100 V

PG

10

µA

EN

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

 2002, Texas Instruments Incorporated

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.