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NCP1835B Datasheet, PDF (1/17 Pages) ON Semiconductor – Integrated Li−Ion Charger | |||
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NCP1835
Integrated LiâIon Charger
NCP1835 is an integrated linear charger specifically designed to
charge 1âcell LiâIon 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 voltageâsource
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 Preâcharge Current for Conditioning Deeply Discharged
Battery
⢠Integrated EndâofâCharge (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 â 1000 mA
⢠OpenâDrain 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
⢠PbâFree Packages are Available
Typical Applications
⢠Cellular Phones
⢠PDAs, MP3 Players
⢠StandâAlone Chargers
⢠Battery Operated Devices
http://onsemi.com
MARKING
DIAGRAMS
1
1835
4200
ALYWG
G
DFN 3x3
MN SUFFIX
CASE 485C
1
1835
4242
ALYWG
G
1835 = Device Code
4200 = 4.2 V
4242 = 4.242 V
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbâFree Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
VCC 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
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
February, 2006 â Rev. 3
Publication Order Number:
NCP1835/D
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