TPS2490_08 Datasheet, PDF (1/20 Pages) Texas Instruments – POSITIVE HIGH-VOLTAGE POWER-LIMITING HOTSWAP CONTROLLER

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Actual Size
3,0 mm X 4,88 mm
TPS2490
TPS2491
SLVS503 – NOVEMBER 2003
POSITIVE HIGH-VOLTAGE POWER-LIMITING HOTSWAP CONTROLLER
FEATURES
• Programmable Power Limiting and Current
Limiting for Complete SOA Protection
• Wide Operating Range: +9 V to +80 V
• Latched Operation (TPS2490) and Automatic
Retry (TPS2491)
• High-side Drive for Low-R_DS(on) External
N-channel MOSFET
• Programmable Fault Timer to Protect the
MOSFET and Eliminate Nuisance Shutdowns
• Power Good Open-Drain Output for Down-
stream DC/DC Coordination
• Enable can be used as a Programmable
Undervoltage Lockout or Logic Control
• Small, Space-saving 10-pin MSOP Package
APPLICATIONS
• Server Backplanes
• Storage Area Networks (SAN)
• Medical Systems
• Plug-in Modules
• Base Stations
DGS Package
(Top View)
EN
1
10
VREF
2
9
PROG
3
8
TIMER
4
7
GND
5
6
VCC
SENSE
GATE
OUT
PG
DESCRIPTION
The TPS2490 and TPS2491 are easy-to-use, positive high voltage, 10-pin Hot Swap Power Manager™ devices
that safely drive an external N-channel MOSFET switch. The power limit and current limit (both are adjustable
and independent of each other) ensure that the external MOSFET operates inside a selected safe operating area
(SOA) under the harshest operating conditions. Applications include inrush current limiting, electronic circuit
breaker protection, controlled load turn-on, interfacing to down-stream dc-to-dc converters, and power feed
protection. These devices are available in a small, space-saving 10-pin MSOP package and significantly reduce
the number of external devices, saving precious board space. The TPS2490/91 is supported by application
notes, an evaluation module, and a design tool.
Typical Application and Corresponding SOA
V_I = 48 Vdc
D1
SMAJ60A
R1
324 kΩ
R2
13.3 kΩ
R3
41.2 kΩ
I_LIM = 5 A,
V_ON/V_OFF = 34.2 V/31.7 V,
P_LIM = 34 W,
Timeout = 16 mS
C1
0.1 µF
R_S
0.01 Ω
M1
IRF540NS
10
VCC
1
EN
2
VREF
PROG
3
R4
8.25 kΩ
R5
10 Ω
9
8
SENSE GATE
TPS2490/91
TIMER
4
C_T
0.1 µF
V_O at 4 A
R6
470 kΩ
7
OUT
6
PG
Power Good
GND
5
C_O
220 µF
Programmed
SOA, 16mS
Hot Swap Power Manager is a trademark of Texas Instruments.
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 © 2002–2003, Texas Instruments Incorporated