TPS2392

TPS2393

SLUS536C − AUGUST 2002 − REVISED AUGUST 2004

FULLFEATURED -48V

HOT SWAP POWER MANAGER

FEATURES

Creapage/Clearance

APPLICATIONS

DESCRIPTION

The TPS2392 and TPS2393 integrated circuits are hot

swap power managers optimized for use in nominal

−48-V systems. They operate with supply voltage

ranges from −20-V 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. Each device provides load current

slew rate control and peak magnitude limiting.

Undervoltage and overvoltage shutdown thresholds

are easily programmed via a three-resistor divider

network. In addition, two active-low, debounced inputs

provide plug-in insertion detection. A power good (PG)

output enables downstream converters. The TPS2392

and TPS2393 also provide the basic hot swap functions

of electrical isolation of faulty cards, filtered protection

against nuisance overcurrent trips, and single-line fault

reporting. The 44-pin part supports designs where

telecomm creepage and clearance requirements must

be followed.

The TPS2392 latches off in response to current faults,

while the TPS2393 periodically retries the load in the

event of a fault.

UDG−02098

D1

BAS19

C2

0.1

µF

R3

3.92 k

Ω

1%

R2

4.99 k

Ω

1%

R1

200 k

Ω

1%

R4

20 m

Ω

1/4, 1%

R6

10 k

Ω

R5

100

k

Ω

C4

100

µF

100 V

COUT

= 32.8 V

= 30.8 V

= 72.6 V

VUV

VUV

VOV

GATE

1

2

3

4

5

6

7

14

13

12

11

10

9

8

UVLO

INSA

INSB

FAULT

EN

FLTTIME

OVLO

DRAINSNS

ISENS

IRAMP

−VIN

PG

RTN

TPS2392/TPS2393

VOUT+

VOUT−

VIN+

VIN−

DC/DC

CONVERTER

EN

VDD

C3

1500 pF

VOUT+

VOUT−

GND

C1

3900 pF

−48V

Q1

IRF530

D2

5.6 V

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.

.

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.

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 2004, Texas Instruments Incorporated