34653 datasheet, PDF - EEWORLD Datasheet

34653: Description1.0 A negative voltage hot swap controller; File Size632KB，24 Pages; ManufacturerFREESCALE (NXP)

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1.0 A negative voltage hot swap controller

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Freescale Semiconductor

Advance Information

Document Number: MC34653

Rev. 8.0, 2/2007

1.0 A Negative Voltage Hot

Swap Controller

The 34653 is a highly integrated - 48 V hot swap controller with an

internal Power MOSFET. It provides the means to safely install and

remove boards from live - 48 V backplanes without having to power

down the entire system. It regulates the inrush current, from the

supply to the load’s filter capacitor, to a user-programmable limit,

allowing the system to safely stabilize. A disable function allows the

user to disable the 34653 manually or through a microprocessor and

safely disconnect the load from the main power line.

The 34653 has active high and active low power good output

signals that can be used to directly enable a power module load.

Undervoltage and overvoltage detection circuitry monitors the input

voltage to check that it is within its operating range. A start-up delay

timer ensures that it is safe to turn on the Power MOSFET and charge

the load capacitor.

A two-level current limit approach to controlling the inrush current

and switching on the load limits the peak power dissipation in the

Power MOSFET. Both current limits are user programmable.

Features

• Integrated Power MOSFET and Control IC in a Small Outline

Package

• Input Voltage Operation Range from - 39 V to - 74 V

• Programmable Overcurrent Limit with Auto Retry

• Programmable Charging Current Limit Independent of Load

Capacitor

• Start-Up and Retry Delay Timer

• Overvoltage and Undervoltage Detection

• Active High and Low Power Good Output Signals

• Thermal Shutdown

• Pb-Free Packaging Designated by Suffix Code EF

34653

HOT SWAP

EF SUFFIX (Pb-Free)

98ASB42564B

8-PIN SOICN

ORDERING INFORMATION

Device

MCZ34653EF/ R2

MC34653EF/ R2

Temperature

Range (T

)

- 40°C to 85°C

Package

8 SOICN

34653

DISABLE

GND

System

Power

Supply

(Backplane)

-48 V

VIN

VPWR

VOUT

Load

Application

Dependent

Optional

External

Components

ILIM

ICHG

Optional

External

Components

Figure 1. 34653 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

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