NCP1835BMNR2G Datasheet, PDF (1/14 Pages) ON Semiconductor – Integrated Li−Ion Charger

NCP1835B
Integrated Li−Ion Charger
NCP1835B is an integrated linear charger specifically designed to
charge 1−cell Li−Ion batteries with a constant current, constant
voltage (CCCV) profile.
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 NCP1835B can charge from a standard wall adapter or
from the USB port. It has been optimized to charge low capacity
batteries such as those found in wireless headsets and flash
memory−based MP3 players.
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 a Deeply
Discharged Battery
• Integrated End−of−Charge (EOC) Detection
• 1% Voltage Regulation
• 4.2 V Regulated Output Voltage
• Regulation Maintained without a Battery Present
• Programmable Full Charge Current
• 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 Package is Available
Typical Applications
• Wireless Headsets
• MP3 Players
• USB Appliances
• Battery Operated Devices
http://onsemi.com
MARKING
DIAGRAM
1
DFN 3x3
MN SUFFIX
CASE 485C
1 _1835B
ALYWG
G
1835B = Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
V_CC 1
FAULT 2
CFLG ³
TIMER 4
GND 5
DFN 3x3
10 BAT
9 VSNS
8 ISEL
7 V2P8
6 EN
(Top View)
ORDERING INFORMATION
Device
NCP1835BMNR2
Package
DFN−10
Shipping^†
3000 Units/Reel
NCP1835BMNR2G DFN−10 3000 Units/Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
1
September, 2006 − Rev. 4
Publication Order Number:
NCP1835B/D