Datasheet > 34652_07

34652_07

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		控制器
页数	文件大小	规格书
26页	1362K
描述
2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability

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34652_07 数据手册

Document Number: MC34652

Rev. 8.0, 2/2007

Freescale Semiconductor

Advance Information

2.0 A Negative Voltage Hot

Swap Controller with Enhanced

Programmability

34652

The 34652 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 34652 manually or through a microprocessor and

safely disconnect the load from the main power line.

HOT SWAP

The 34652 has active high and active low power good output

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

Programmable under- and overvoltage detection circuitry monitors

the input voltage to check that it is within its operating range.

A programmable 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.

SCALE 2:1

EF SUFFIX (PB-Free)

98ASB42566B

16-PIN SOICN

Features

ORDERING INFORMATION

• Integrated Power MOSFET and Control IC in a Small Outline

Package

• Input Voltage Operation Range from -15 V to -80 V

• Programmable Overcurrent Limit with Auto Retry

• Programmable Charging Current Limit Independent of Load

Capacitor

• Programmable Start-Up and Retry Delay Timer

• Programmable Overvoltage and Undervoltage Detection

• Active High and Low Power Good Output Signals

• Thermal Shutdown

Temperature

Package

Device

Range (T )

MC34652EF/R2

MCZ34652EF/R2

-40°C to 85°C

16 SOICN

• Pb-Free Packaging Designated by Suffix Code EF

34652

DISABLE

Application

Dependent

GND

System

Power

Supply

VPWR

VOUT

Load

(Backplane)

-48 V

VIN

ICHG

Optional

External

Components

TIMER

Optional

External

Components

ILIM

Figure 1. 34652 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...26

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