TPS2398 Datasheet, PDF (1/20 Pages) Texas Instruments – -48V HOT SWAP CONTROLLER FOR REDUNDANT SUPPLY SYSTEMS

TPS2398
TPS2399
SLUS562A − JUNE 2003 − REVISED SEPTEMBER 2003
-48ĆV HOT SWAP CONTROLLER
FOR REDUNDANTĆSUPPLY SYSTEMS
FEATURES
D Wide Input Supply Range: −36 V to −80 V
D Transient Rating to −100 V
D Improved Transient Response
D Enable Input (EN)
D Programmable Current Limit
D Programmable Current Slew Rate
D Fault Timer to Eliminate Nuisance Trips
D Open-Drain Power Good Output (PG)
D 8-Pin MSOP Package
⋅APPLICATIONS
D −48-V Distributed Power Systems
D Redundant Negative Voltage Supplies
D Central Office Switching
APPLICATION DIAGRAM
DESCRIPTION
The TPS2398 and TPS2399 integrated circuits
are hot swap power managers optimized for use
in nominal −48-V systems. For redundant-supply
systems, they incorporate an improved circuit
breaker response that provides rapid protection
from short circuits, while still enabling plug-ins to
tolerate large transients that can be generated by
the sudden switchover to a higher voltage supply.
They are designed for supply voltage ranges up 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. Both devices provide load current slew
rate and peak magnitude limiting, easily
programmed by sense resistor value and a single-
external capacitor.
−48V_RTN
D2
−48V_INB
D1
−48V_INA
R3
30 kΩ
0.5 W
R2
100 kΩ
TPS2398/TPS2399
1 _PG
RTN 8
2 EN
GATE 7
C1
0.047 µF
3 FLTTIME ISENS 6
4 IRAMP −VIN 5
C2
3900 pF
+
C3
100 µF
100 V
Q1
IRF530
VDD
VIN+
VOUT+
EN
10 µA
VIN−
VOUT−
DC/DC CONVERTER
VOUT+
+
COUT
VOUT−
R1
0.02 Ω
1%
UDG−03069
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright  2002, Texas Instruments Incorporated
1