廬
ISL6141, ISL6151
Data Sheet
July 2004
FN9079.1
Negative Voltage Hot Plug Controller
The ISL6141 is an 8-pin, negative voltage hot plug controller
that allows a board to be safely inserted and removed from a
live backplane. Inrush current is limited to a programmable
value by controlling the gate voltage of an external N-
channel pass transistor. The pass transistor is turned off if
the input voltage is less than the Under-Voltage threshold, or
greater than the Over-Voltage threshold. The IntelliTrip
TM
electronic circuit breaker and programmable current limit
features protect the system against short circuits. When the
Over-Current threshold is exceeded, the output current is
limited for 600碌s before the circuit breaker shuts down the
FET. If the fault disappears before the 600碌s time-out,
normal operation resumes. In addition, the IntelliTrip
TM
electronic circuit breaker has a fast Hard Fault shutdown with
a threshold set at 4 times the current limit value. When
activated, the GATE is immediately turned off and then
slowly turned back on for a single retry (soft-start). The
active low PWRGD signal can be used to directly enable a
power module (with a low enable input). The ISL6151 is the
same device but has an active high PWRGD output.
Features
鈥?Operates from -20V to -80V (-100V Absolute Max Rating)
鈥?Programmable Inrush Current
鈥?Programmable Over-Voltage Protection
鈥?Programmable Under-Voltage Protection
- 135mV of hysteresis
- Equals ~4.6V of hysteresis at the power supply
鈥?UVLO (Under-Voltage Lock-Out) ~ 16.5V
鈥?Programmable Current Limit with 600碌s time-out
鈥?IntelliTrip
TM
electronic circuit breaker distinguishes
between Over-Current and Hard Fault conditions
- Fast shutdown for Hard Faults with a single retry (fault
current > 4X current limit value).
鈥?Pin Compatible with ISL6140/50.
鈥?Power Good Control Output
- Monitors both the DRAIN (voltage drop across the FET)
and the GATE voltage; once both are OK, the Power
Good output is latched in the active state.
- PWRGD active high: ISL6151 (H version)
- PWRGD active low: ISL6141 (L version)
鈥?Pb-free available
Typical Application (RL, CL are the Load)
GND
R4
UV
R5
OV
R6
V
EE
SENSE
GATE
C1
R3
DRAIN
C2
RL
-48V IN
R1
Q1
-48V OUT
(LOAD)
CL
V
DD
PWRGD
GND
Applications
鈥?VoIP (Voice over Internet Protocol) Servers
鈥?Telecom systems at -48V
鈥?Negative Power Supply Control
鈥?+24V Wireless Base Station Power
ISL6141
R2
Related Literature
鈥?ISL6140/41 EVAL1 Board Set, Document # AN9967
鈥?ISL6142/52 EVAL1 Board Set, Document # AN1000
鈥?ISL6140/50 Hot Plug Controller, Document # FN9039
鈥?ISL6116 Hot Plug Controller, Document # FN4778
NOTE: See www.intersil.com/hotplug for more information.
R1 = 0.02鈩?(1%)
R2 = 10鈩?(5%)
R3 = 18k鈩?(5%)
R4 = 549k鈩?(1%)
R5 = 6.49k鈩?(1%)
R6 = 10k鈩?(1%)
C1 = 150nF (25V)
C2 = 3.3nF (100V)
Q1 = IRF530 (100V, 17A, 0.11鈩?
CL = 100碌F (100V)
RL = equivalent load
Pinout
ISL6141 OR ISL6151 (8 LEAD SOIC)
PWRGD/PWRGD
OV
UV
V
EE
1
2
3
4
8 V
DD
TOP VIEW
7 DRAIN
6 GATE
5 SENSE
ISL6141 has active low (L version) PWRGD output pin
ISL6151 has active high (H version) PWRGD output pin
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002, 2004. All Rights Reserved
Intellitrip鈩?is a trademark of Intersil Americas Inc.