1

UVEN

VCC

14

R

SENSE

0.01 W

13

R

GATE

10 W

12

11

R1

R2

3

2

7

4

9

8

6

R4

41.2 kW

5

R5

8.25 kW

C

T

0.068 mF

470 kW

470 kW

SENSE

GATE

OUT

FLT

PG

IMON

TIMER

GND

VREF

PROG

OV

TPS2492/93

V

LOGIC

V

OUT

R3

M1

V

IN

C1

D1

P

LIM

= 34 W

I

LIM

= 5 A

Timeout = 10 ms

c

o

V

DS

- Drain-to-Source Voltage - V

0.1

1

10

1000

DRAIN-TO-SOURCE CURRENT

vs

DRAIN-TO-SOURCE VOLTAGE

1

10

100

1000

100

Programmed SOA 10 ms

10 ms

1 ms

100 ms

Operation in the gray area is limited by R

DS(on)

TPS2492

TPS2493

www.ti.com

SLUSA65A – JULY 2010 – REVISED AUGUST 2010

Positive High-Voltage Power-Limiting Hotswap Controller

With Analog Current Monitor Output

Check for Samples: TPS2492 , TPS2493

1

FEATURES

DESCRIPTION

•

9-V to 80-V Operation

•

High-Side Drive for External N-FET

The TPS2492 and TPS2493 are easy-to-use, positive

high voltage, 14-pin Hotswap Controllers that safely

•

Programmable FET Power Limit

drive an external N-channel FET to control load

•

Programmable Load Current Limit

current. The programmable power foldback protection

•

Programmable Fault Timer

ensures that the external FET operates inside its safe

operating area (SOA) during overload conditions by

•

Load Current Monitor Output

controlling of power dissipation. The programmable

•

Power Good and Fault Outputs

current limit and fault timer ensure the supply,

•

Enable/UV, OV Inputs

external

FET,

and

load

are

not

harmed

by

overcurrent. Features include inrush current limiting,

•

Latch or Auto Restart After Fault

controlled load turn-on, interfacing to down-stream

•

EVM Available SLUU425

DC-to-DC converters, and power feed protection.

•

Calculation Tool Available SLVC033

The analog current monitor output provides a signal

ready for sampling with an external A/D converter.

APPLICATIONS

Additional features include programmable overvoltage

•

Server Backplanes

and

undervoltage

shutdown,

power-good

for

•

Storage Area Networks (SAN)

coordinating loads with inrush, and a fault indicator to

•

Medical Systems

indicate an over-current shutdown.

•

Plug-in Modules

•

Base Stations

Typical Application Circuit

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 © 2010, 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.