TPS2492_10 Datasheet, PDF (1/33 Pages) Texas Instruments – Positive High-Voltage Power-Limiting Hotswap Controller With Analog Current Monitor Output

www.ti.com
TPS2492
TPS2493
SLUSA65A – JULY 2010 – REVISED AUGUST 2010
Positive High-Voltage Power-Limiting Hotswap Controller
With Analog Current Monitor Output
Check for Samples: TPS2492 , TPS2493
FEATURES
1
• 9-V to 80-V Operation
• High-Side Drive for External N-FET
• Programmable FET Power Limit
• Programmable Load Current Limit
• Programmable Fault Timer
• 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
APPLICATIONS
• Server Backplanes
• Storage Area Networks (SAN)
• Medical Systems
• Plug-in Modules
• Base Stations
DESCRIPTION
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.
The analog current monitor output provides a signal
ready for sampling with an external A/D converter.
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.
Typical Application Circuit
R
SENSE
0.01 W
M1
V
IN
V
OUT
c
R
o
GATE
10 W
V
LOGIC
R1
14 13
12 11
470 kW
470 kW
VCC SENSE GATE OUT
C1
FLT 9
1 UVEN TPS2492/93
PG 8
D1
IMON 6
R2 ^{OV PROG VREF GND TIMER}
5
3
2
7
4
R4
41.2 kW
R3
R5
C
T
0.068 mF
P = 34 W
LIM
I =5A
LIM
Timeout = 10 ms
8.25 kW
1000
DRAIN-TO-SOURCE CURRENT
vs
DRAIN-TO-SOURCE VOLTAGE
Operation in the gray area is limited by R
DS(on)
100
10
1
Programmed SOA 10 ms
100 ms
1 ms
10 ms
0.1
1
10
100
V - Drain-to-Source Voltage - V
DS
1000
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.
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