NCP1835_0603 Datasheet, PDF (1/16 Pages) ON Semiconductor – Integrated Li−Ion Charger

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
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 = 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
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
May, 2006 − Rev. 4
Publication Order Number:
NCP1835/D