ISL6151IB View Datasheet(PDF) - Intersil

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Description

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ISL6151IB

Negative Voltage Hot Plug Controller

Intersil 

®

Data Sheet

ISL6141, ISL6151

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 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 600µs before the circuit breaker shuts down the

FET. If the fault disappears before the 600µs 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 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.

Typical Application (RL, CL are the Load)

GND

GND

R4

UV

VDD

R5

ISL6141

OV

R6

VEE SENSE GATE

PWRGD

DRAIN

(LOAD)

-48V IN

R1

R1 = 0.02Ω (1%)

C1

R3

R2

C2

Q1

C1 = 150nF (25V)

CL

RL

-48V OUT

R2 = 10Ω (5%)

C2 = 3.3nF (100V)

R3 = 18kΩ (5%)

Q1 = IRF530 (100V, 17A, 0.11Ω)

R4 = 549kΩ (1%)

CL = 100µF (100V)

R5 = 6.49kΩ (1%)

RL = equivalent load

R6 = 10kΩ (1%)

Features

• Operates from -20V to -80V (-100V Absolute Max Rating)

• Programmable Inrush Current

• Programmable Over-Voltage Protection

• Programmable Under-Voltage Protection

- 135mV of hysteresis

- Equals ~4.6V of hysteresis at the power supply

• UVLO (Under-Voltage Lock-Out) ~ 16.5V

• Programmable Current Limit with 600µs time-out

• IntelliTripTM 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).

• Pin Compatible with ISL6140/50.

• 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)

• Pb-free available

Applications

• VoIP (Voice over Internet Protocol) Servers

• Telecom systems at -48V

• Negative Power Supply Control

• +24V Wireless Base Station Power

Related Literature

• ISL6140/41 EVAL1 Board Set, Document # AN9967

• ISL6142/52 EVAL1 Board Set, Document # AN1000

• ISL6140/50 Hot Plug Controller, Document # FN9039

• ISL6116 Hot Plug Controller, Document # FN4778

NOTE: See www.intersil.com/hotplug for more information.

Pinout

ISL6141 OR ISL6151 (8 LEAD SOIC)

PWRGD/PWRGD 1

OV 2

UV 3

VEE 4

TOP VIEW

8 VDD

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 © Intersil Americas Inc. 2002, 2004. All Rights Reserved

Intellitrip™ is a trademark of Intersil Americas Inc.

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