NCP1835MN20R2 datasheet(1/17 Pages) ONSEMI

Part #	NCP1835MN20R2

Description	Integrated Li?묲on Charger

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Manufacturer	ONSEMI [ON Semiconductor]

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February, 2006 − Rev. 3

1

Publication Order Number:

NCP1835/D

NCP1835

Integrated Li−Ion Charger

NCP1835 is an integrated linear charger specifically designed to

charge 1−cell Li−Ion batteries with a constant current, constant

voltage (CCCV) profile. It can charge at currents of up to 1.0 A.

Its low input voltage capability, adjustable charge current, ability

to maintain regulation without a battery, and its onboard thermal

foldback make it versatile enough to charge from a variety of wall

adapters. The NCP1835 can charge from a standard voltage−source

wall adapter as a CCCV charger, or from a current limited adapter to

limit power dissipation in the pass device.

Features

• Integrated Voltage and Current Regulation

• No External MOSFET, Sense Resistor or Blocking Diode Required

• Charge Current Thermal Foldback

• Integrated Pre−charge Current for Conditioning Deeply Discharged

Battery

• Integrated End−of−Charge (EOC) Detection

• 1% Voltage Regulation

• 4.2 V or 4.242 V Regulated Output Voltage

• Regulation Maintained without a Battery Present

• Programmable Full Charge Current 300 − 1000 mA

• Open−Drain Charger Status and Fault Alert Flags

• 2.8 V Output for AC Present Indication and Powering Charging

Subsystems

• Minimum Input Voltage of 2.4 V Allows Use of Current Limited

Adapters

• Automatically Recharging if Battery Voltage Drops after Charging

Cycle is Completed

• Low Profile 3x3 mm DFN Package

• Pb−Free Packages are Available

Typical Applications

• Cellular Phones

• PDAs, MP3 Players

• Stand−Alone Chargers

• Battery Operated Devices

http://onsemi.com

1835 = Device Code

4200 = 4.2 V

4242 = 4.242 V

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

1

1835

4200

ALYW

G

DFN 3x3

MN SUFFIX

CASE 485C

MARKING

DIAGRAMS

PIN CONNECTIONS

(Top View)

VCC

BAT

FAULT

CFLG

GND

VSNS

ISEL

EN

TIMER

V2P8

1

2

3

4

5

10

9

8

7

6

DFN 3x3

1

1835

4242

ALYW

G

See detailed ordering and shipping information in the package

dimensions section on page 15 of this data sheet.

ORDERING INFORMATION

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