1
FN9086.1
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 trademark of Intersil Americas LLC.
Intellitrip™ is a trademark of Intersil Americas LLC.
Copyright © Intersil Americas Inc. 2002, 2004, All Rights Reserved
ISL6142, ISL6152
Negative Voltage Hot Plug Controller
The ISL6142/52 are 14 pin, negative voltage hot plug controllers
that allow 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 PWRGD
/PWRGD outputs can be used to
directly enable a power module. When the Gate and DRAIN
voltages are both considered good the output is latched in the
active state.
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 a time-out period before the circuit breaker trips and
shuts down the FET. The time-out period is programmable with an
external capacitor connected to the CT pin. If the fault disappears
before the programmed 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 Over-Current
trip point. When activated, the GATE is immediately turned off and
then slowly turned back on for a single retry.
The IS+, IS-, and IS
OUT
pins combine to provide a load current
monitor feature that presents a scaled version of the load current
at the IS
OUT
pin. Current to voltage conversion is accomplished
by placing a resistor (R9) from IS
OUT
to the negative input (-48V).
Related Literature
• ISL6142/52EVAL1 Board Set, Document AN1000
• ISL6140/50EVAL1 Board Set, Document AN9967
• ISL6140/41EVAL1 Board Set, Document AN1020
• ISL6141/51 Hot Plug Controller, Document FN9079
• ISL6141/51 Hot Plug Controller, Document FN9039
• ISL6116 Hot Plug Controller, Document FN4778
NOTE: See www.intersil.com/hotplug for more information.
Pinout
ISL6142 OR ISL6152 (14 LEAD SOIC)
Typical Application
Features
• Operates from -20V to -80V (-100V Absolute Max Rating)
• Programmable Inrush Current
• Programmable Time-Out
• Programmable Current Limit
• Programmable Over-Voltage Protection
• Programmable Under-Voltage Protection
- 135 mV of hysteresis ~4.7V of hysteresis at the power supply
•V
DD
Under-Voltage Lock-Out (UVLO) ~ 16.5V
• IntelliTrip
TM
Electronic Circuit Breaker distinguishes between
severe and moderate faults
- Fast shutdown for short circuit faults with a single retry (fault
current > 4X current limit value).
•FAULT pin reports the occurrence of an Over-Current Time-Out
• Disable input controls GATE shutdown and resets Over-Current
fault latch
• Load Current Monitor Function
-IS
OUT
provides a scaled version of the load current
- A resistor from IS
OUT
to -V
IN
provides current to voltage
conversion
• Power Good Control Output
- Output latched “good” when DRAIN and GATE voltage
thresholds are met.
-(PWRGD
active low: ISL6142 (L version)
- PWRGD active high: ISL6152 (H version)
• Pb-free available
Applications
• VoIP (Voice over Internet Protocol) Servers
• Telecom systems at -48V
• Negative Power Supply Control
• +24V Wireless Base Station Power
FAULT
OV
10
13
12
4
3
2
CT
PWRGD
/PWRGD
1
V
DD
14
GATE
9
IS+
8
SENSE
UV
5
IS-
6
V
EE
7
11
DRAIN
ISL6142/52
Top View
DIS
IS
OUT
ISL6142/ISL6152
V
DD
UV
OV
V
EE
SENSE
GATE DRAIN
PWRGD
R4
R5
R6
R1
R2
R3
C2
C1
Q1
CL
GND GND
-48V IN
-48V OUT
RL
LOAD
CT
IS-
IS+
R8
R7
R9
C3
FAULT
DIS
IS
OUT
Logic
Supply
R10
R6 = 10K
(1%)
R7 = R8 = 400
(1%)
R9 = 4.99K
(1%)
R10 = 5.1K
(10%)
C1 = 150nF (25V)
C2 = 3.3nF (100V)
C3 = 1500pF (25V)
Q1 = IRF530
CL = 100uF (100V)
R1 = 0.02
(1%)
R2 = 10
(5%)
R3 = 18K
(5%)
R4 = 549K
(1%)
R5 = 6.49K
(1%)
RL = Equivalent load
PWRGD
Data Sheet July 2004
N
O
T
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