TPS2393A_15 Datasheet, PDF (1/31 Pages) Texas Instruments – -48-V HOT SWAP WITH INSERTION AND REMOVAL DETECTION DELAY

TPS2393A
ą
-48ĆV HOT SWAP WITH INSERTION AND
REMOVAL DETECTION DELAY
SLUS610 − JULY 2004
FEATURES
D Wide Input Supply Range: −20 V to −80 V
D Transient Rating to −100 V
D Insertion/Removal Detection Delay
D Extended Debounce Delay
D Programmable Current Limit
D Programmable Current Slew Rate
D Programmable UV/OV Thresholds/Hysteresis
D Open-Drain Power Good (PG) Output
D Fault Timer to Eliminate Nuisance Trips
D Open-Drain Fault Output (FAULT)
D 14-Pin TSSOP package
APPLICATIONS
D −48-V Distributed Power Systems
D Central Office Switching
D Wireless Base Station
DESCRIPTION
The TPS2393A integrated circuit is a hot swap
power manager optimized for use in nominal
−48-V systems. It operates with supply voltage
ranges from −20-V to −80-V, and is rated to
withstand spikes to −100 V. In conjunction with an
external N-channel FET and sense resistor, it can
be used to enable live insertion of plug-in cards
and modules in powered systems. It provides load
current slew rate control and peak magnitude
limiting. Undervoltage and overvoltage shutdown
thresholds are easily programmed via a
three-resistor divider network. In addition, two
active-low, debounced inputs provide plug-in
insertion and removal detection. The associated
debounce delay applies to both actions. A power
good (PG) output enables downstream
converters. The TPS2393A also provides the
basic hot swap functions of electrical isolation of
faulty cards, filtered protection against nuisance
overcurrent trips, and single-line fault reporting.
The TPS2393A periodically retries the load in the
event of a fault.
GND
R7
56.2 kW, 1%
R1
R2
200 kW, 1% 4.99 kW, 1%
R3
3.92 kW
1%
R5
100 kW
R6
10 kW
TPS2393A
1 UVLO
OVLO 14 D1
BAS19
2 INSA DRAINSNS 13
3 INSB
PG 12
C4
100 mF
100 V
DC/DC
CONVERTER
VIN+ VOUT+
VDD
EN
VIN− VOUT−
VOUT+
COUT
VOUT−
C2
1500 pF
D2
5.6 V
4 FAULT
5 EN
RTN 11
GATE 10
Q1
IRF530
VUV
= 32.8 V
−48V
F1
R8, 56.2 kW, 1%
C2
0.047 mF
6 FLTTIME ISENS 9
7 IRAMP
−VIN 8
C2, 3900 pF
R4
20 mW
1/4, 1%
VUV
= 30.8 V
VOV
= 72.6 V
UDG−04073
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  2004, Texas Instruments Incorporated
1