
1
FN6106.0
ISL9203
Li-ion/Li Polymer Battery Charger
The ISL9203 is an integrated single-cell Li-ion or Li-polymer
battery charger capable of operating with an input voltage as
low as 2.4V. This charger is designed to work with various
types of ac adapters.
The ISL9203 operates as a linear charger when the ac
adapter is a voltage source. The battery is charged in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 1.5A. The ISL9203 can also work with a current-limited
adapter to minimize the thermal dissipation, in which case
the ISL9203 combines the benefits of both a linear charger
and a pulse charger.
The ISL9203 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space limited for thermal dissipation. Additional features
include preconditioning of an over-discharged battery,
automatic recharge, and thermally enhanced DFN package.
Typical Application Circuit
Features
Pb-Free Available (RoHS Compliant)
Complete Charger for Single-Cell Li-ion Batteries
Very Low Thermal Dissipation
Integrated Pass Element and Current Sensor
No External Blocking Diode Required
1% Voltage Accuracy
Programmable Current Limit up to 1.5A
Charge Current Thermal Foldback
Accepts Multiple Types of Adapters
Guaranteed to Operate at 2.65V After Start Up
Ambient Temperature Range: -20
°
C to 70
°
C
Thermally-Enhanced DFN Packages
Applications
Handheld Devices including Medical Handhelds
PDAs, Cell Phones and Smart Phones
Portable Instruments, MP3 Players
Self-Charging Battery Packs
Stand-Alone Chargers
USB Bus-Powered Chargers
Related Literature
Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinout
ISL9203 (3x3 DFN)
TOP VIEW
Ordering Information
PART # (NOTE)
TEMP.
RANGE (°C)
PACKAGE
PKG. DWG.
#
ISL9203CRZ
-20 to 70
10 Ld 3x3 DFN
L10.3x3
ISL9203CRZ-T
10 Ld 3x3 DFN Tape and Reel
NOTE:
"Z" Suffix:
Intersil Pb-free products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
VBAT
VIN
5V
Input
ISL9203
C
1
V2P8
EN
GND
IREF
FAULT
VSEN
STATUS
TIME
C
TIME
Floating
to Enable
C
2
C
3
R
IREF
VIN
FAULT
STATUS
TIME
GND
VBAT
VSEN
IREF
V2P8
EN
2
3
4
1
5
9
8
7
10
6
Data Sheet
February 3, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.