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X80071Q20I Datasheet

  • X80071Q20I

  • Hot Swap Controller with Advanced Fault Protection and Volta...

  • 276.77KB

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廬
X80070, X80071, X80072, X80073
Data Sheet
March 15, 2005
FN8150.0
Hot Swap Controller with
Advanced Fault Protection and
Voltage Regulator Output
FEATURES
鈥?Hot swap controller
鈥?Overvoltage and undervoltage protection
鈥?Undervoltage lockout for battery/redundant supplies
鈥?Electronic circuit breaker
鈥?Slew Rate for External FET Gate Control
鈥?Overcurrent Detection and Gate Shut-off
鈥?3X overcurrent limit on insertion
鈥?5碌s overcurrent filter
鈥?Hardshort Retry and Indicator
鈥?Typically operates from -30V to -80V. Tolerates tran-
sients to -200V (limited by external components)
鈥?Positive Voltages (low side switching) from 12V to 60V
鈥?Soft Re-insertion
鈥?Soft extraction
鈥?Battery backup mode
鈥?Hardshort retry
鈥?Overcurrent Filter
鈥?Insertion Limits.
鈥?Selectable Gate Current
鈥?Voltage Regulator Output for Supervisory Functions
鈥?Debounced manual reset input
鈥?Available packages
鈥?20-lead Quad No-Lead Frame (QFN)
APPLICATIONS
鈥?-48V Hot Swap Power Backplane/Distribution Central
Office, Ethernet for VOIP
鈥?Positive Voltage Hotswap 12V to 60V Applications
(low side switching)
鈥?Card Insertion Detection
鈥?IP Phone Applications
鈥?Databus Power Interfacing
鈥?Custom Industrial Power Backplanes
鈥?Distributed Power Systems
DESCRIPTION
The X80070 is a hot swap controller that allows a board to be
safely inserted and removed from a live backplane without
turning off the main power supply.
During insertion, the gate of an external power MOSFET is
clamped low to suppress contact bounce. The
undervoltage/overvoltage circuits and the power-on reset
circuitry suppress the gate turn on until the mechanical bounce
has ended. The X80070 turns on the gate with a slew rate to
limit the inrush current and incorporates an electronic circuit
breaker set by a sense resistor. After the load is successfully
charged, the PWRGD signal is asserted; indicating that the
device is ready to power sequence the DC-DC power bricks.
At all times, the X80070 monitors for undervoltage, overvoltage,
and overcurrent conditions. If any fault occurs, the gate will be
immediately shut off and the PWRGD will be returned to the
inactive state. The X80070 contains overvoltage, undervoltage
and overcurrent detection, hardshort retry, gate control slew
rate and power good control.
TYPICAL APPLICATION
-48V
Return
*
X80070
V
RGO
DC-DC
Module
1
ON/OFF
R5
30k
1%
R4
182k
1%
PWRGD
UV=43V
V
UV/OV
OV=75V
V
DD
I
GQ1
I
GQ0
Gate
Current
Select
SENSE GATE
100n
Rs
*
*
R6
10k
1%
V
EE
100
22K
3.3n
-48V
0.02鈩?/div>
5%
Q1
IRFR120
*
Optional components DC-DC Module
Depends on choice of
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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