ISL6142, ISL6152
®
Data Sheet
July 2004
FN9086.1
Negative Voltage Hot Plug Controller
Typical Application
GND
GND
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.
Logic
Supply
FAULT
V
DD
PWRGD
PWRGD
DIS
IS
R10
OUT
R4
R5
R6
ISL6142/ISL6152
UV
OV
CT
IS+ SENSE
V
GATE DRAIN
IS-
EE
LOAD
R3
C2
C1
R7
CL
RL
R8
R9
C3
R2
The IntelliTripTM 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 IntelliTripTM 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.
-48V IN
R1
Q1
-48V OUT
C2 = 3.3nF (100V)
C3 = 1500pF (25V)
Q1 = IRF530
R1 = 0.02
Ω
(5%)
(1%)
R6 = 10K
Ω
(1%)
R2 = 10
Ω
R7 = R8 = 400
Ω
(1%)
R3 = 18K
Ω
(5%)
(1%)
(1%)
R9 = 4.99K
Ω
Ω
(1%)
CL = 100uF (100V)
RL = Equivalent load
R4 = 549K
Ω
R10 = 5.1K
(10%)
R5 = 6.49K
Ω
C1 = 150nF (25V)
Features
• Operates from -20V to -80V (-100V Absolute Max Rating)
• Programmable Inrush Current
• Programmable Time-Out
• Programmable Current Limit
The IS+, IS-, and IS
OUT
pins combine to provide a load current
• Programmable Over-Voltage Protection
• Programmable Under-Voltage Protection
- 135 mV of hysteresis ~4.7V of hysteresis at the power supply
monitor feature that presents a scaled version of the load current
at the IS pin. Current to voltage conversion is accomplished
OUT
by placing a resistor (R9) from IS
to the negative input (-48V).
OUT
• V
DD
Under-Voltage Lock-Out (UVLO) ~ 16.5V
Related Literature
• IntelliTripTM Electronic Circuit Breaker distinguishes between
severe and moderate faults
• 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.
- 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
Pinout
- IS
OUT
provides a scaled version of the load current
ISL6142 OR ISL6152 (14 LEAD SOIC)
- A resistor from IS
conversion
to -V provides current to voltage
IN
OUT
14
13
12
11
10
9
PWRGD/PWRGD
1
2
V
DD
Top View
FAULT
DIS
CT
IS
• Power Good Control Output
3
4
5
OUT
ISL6142/52
OV
- Output latched “good” when DRAIN and GATE voltage
thresholds are met.
DRAIN
GATE
IS+
UV
IS-
6
7
- (PWRGD active low: ISL6142 (L version)
- PWRGD active high: ISL6152 (H version)
8
V
SENSE
EE
• Pb-free available
Applications
• VoIP (Voice over Internet Protocol) Servers
• Telecom systems at -48V
• Negative Power Supply Control
• +24V Wireless Base Station Power
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.
Intellitrip™ is a trademark of Intersil Americas Inc.
1
Copyright © Intersil Americas Inc. 2002, 2004, All Rights Reserved
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