Datasheet > NCP345/D

NCP345/D

更新时间： 2024-09-18 23:53:27

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Over Voltage Protection IC

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NCP345/D 数据手册

NCP345

Advance Information

Over Voltage Protection IC

The NCP345 over–voltage protection circuit (OVP) protects

sensitive electronic circuitry from over–voltage transients and power

supply faults when used in conjunction with an external P–channel

FET. The device is designed to sense an over–voltage condition and

quickly disconnect the input voltage supply from the load before any

damage can occur. The OVP consists of a precise voltage reference, a

comparator with hysteresis, control logic, and a MOSFET gate driver.

The OVP is designed on a robust BiCMOS process and is intended to

withstand voltage transients up to 30 V.

http://onsemi.com

The device is optimized for applications that have an external

AC/DC adapter or car accessory charger to power the product and/or

recharge the internal batteries. The nominal over–voltage threshold is

6.85 V so it is suitable for single cell Li–Ion applications as well as 3/4

cell NiCD/NiMH applications.

TSOP–5

SN SUFFIX

CASE 483

PIN CONNECTIONS &

MARKING DIAGRAM

Features

• Over–Voltage Turn–Off Time of less than 1.0 µsec

• Accurate Voltage Threshold of 6.85 V (nominal)

• Under–Voltage Lockout Protection

• CNTRL Input Compatible with 1.8 V Logic Levels

OUT

GND

VCC

CNTRL

Typical Applications

= Year

= Work Week

• Cellular Phones

• Digital Cameras

(Top View)

• Portable Computers and PDAs

• Portable CD and other Consumer Electronics

ORDERING INFORMATION

Device

Package

Shipping

NCP345SNT1

TSOP–5

3000 / 7″ Reel

Schottky

Diode

P–CH

AC/DC Adapter or

Accessory Charger

Under–voltage

Lock Out

LOAD

FET

Driver

Logic

OUT

ref

NCP345

CNTRL

GND

Microprocessor

port

Note: This device contains 89 active transistors

Figure 1. Simplified Application Diagram

This document contains information on a new product. Specifications and information herein are subject to change without notice.

Semiconductor Components Industries, LLC, 2001

Publication Order Number:

March, 2001 – Rev. 1

NCP345/D

12 3 4 5 6 7 8

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