TPS2390

TPS2391

SLUS471C – JUNE 2002 – REVISED OCTOBER 29, 2002

SIMPLE -48V HOT SWAP CONTROLLER

1

www.ti.com

FEATURES

DESCRIPTION

The TPS2390 and TPS2391 integrated circuits

are hot swap power managers optimized for use

in nominal –48-V systems. 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.

They also provide single-line fault reporting,

electrical isolation of faulty cards, and protection

against nuisance overcurrent trips. The TPS2390

latches off in response to current faults, while the

TPS2391 periodically retries the load in the event

of a fault.

APPLICATION DIAGRAM

UDG–02085

DGK PACKAGE

(TOP VIEW)

FAULT

18

2

3

4

7

6

5

EN

FLTTIME

IRAMP

RTN

GATE

ISENS

–VIN

6

5

8

7

1

2

3

FAULT

EN

FLTTIME

GATE

ISENSE

–VIN

4

IRAMP

RTN

TPS2390/1

D2

C2

3900 pF

–48V_IN

–48V_RTN

DC/DC

CONVERTER

MODULE

+

+

Q1

IRF530

C3

100

µF

100 V

COUT

VOUT+

VOUT–

R1

0.02

Ω

1/4 W 1%

C1

0.1

µF

R3

10 k

Ω

1 W

R2

100 k

Ω

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.