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
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FEATURES
DESCRIPTION
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9-V to 80-V Operation
High-Side Drive for External N-FET
Programmable FET Power Limit
Programmable Load Current Limit
Programmable Fault Timer
The TPS2492 and TPS2493 are easy-to-use, positive
high voltage, 14-pin Hotswap Controllers that safely
drive an external N-channel FET to control load
current. The programmable power foldback protection
ensures that the external FET operates inside its safe
operating area (SOA) during overload conditions by
controlling of power dissipation. The programmable
current limit and fault timer ensure the supply,
external FET, and load are not harmed by
overcurrent. Features include inrush current limiting,
controlled load turn-on, interfacing to down-stream
DC-to-DC converters, and power feed protection.
Load Current Monitor Output
Power Good and Fault Outputs
Enable/UV, OV Inputs
Latch or Auto Restart After Fault
EVM Available SLUU425
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
and undervoltage shutdown, power-good for
coordinating loads with inrush, and a fault indicator to
indicate an over-current shutdown.
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Server Backplanes
Storage Area Networks (SAN)
Medical Systems
Plug-in Modules
Base Stations
Typical Application Circuit
RSENSE
DRAIN-TO-SOURCE CURRENT
vs
0.01 W
M1
VIN
VOUT
DRAIN-TO-SOURCE VOLTAGE
c
o
VLOGIC
RGATE
1000
10 W
Operation in the gray area is limited by RDS(on)
470 kW
R1
14
13
12
11
470 kW
VCC SENSE GATE OUT
C1
FLT
9
8
6
100
1
UVEN
PG
TPS2492/93
IMON
D1
OV PROG
VREF GND TIMER
R2
R3
100 ms
5
3
2
7
4
10
R4
41.2 kW
PLIM = 34 W
ILIM = 5 A
CT
0.068 mF
1 ms
Timeout = 10 ms
R5
8.25 kW
1
10 ms
Programmed SOA 10 ms
0.1
1
10
100
1000
VDS - Drain-to-Source Voltage - V
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated