1
®
FN9173.4
ISL6298
Li-ion/Li-Polymer Battery Charger
The ISL6298 is an integrated single-cell Li-ion or Li-polymer
battery charger optimized for low current applications. The
targeted applications include mini-disk (MD) players, Blue
Tooth headsets, or other applications that use low-capacity
battery cells.
The ISL6298 is a linear charger that charges the battery in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 450mA during the CC phase. Once the battery voltage
reaches 4.2V (or 4.1V), the charger enters CV mode and the
charge current starts to reduce. When the charger current
drops to a user-programmable threshold, the charger
indicates the end-of-charge with a STATUS pin. The charger
does not actually terminate until a user-programmable total
fast charge time is reached. If the battery voltage drops to a
recharge threshold after termination, the charger will re-
charge the battery to its full capacity. The charger
preconditions the battery with 20% of the programmed CC
current if the battery voltage is below 2.8V. The total
precharge time is limited to 1/8 of the total fast charge time.
The ISL6298 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space-limited for thermal dissipation. Additional features
include an NTC thermistor interface for monitoring the
ambient temperature, the ability to disable the time limit of
the fast charge, an FAULT indication, and a thermally
enhanced QFN or DFN package.
Features
• Complete Charger for Single-Cell Li-ion Batteries
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 450mA
• Programmable End-of-Charge Current
• Preconditioning with 20% Fast Charge Current
• 10% Accuracy at 250mA
• Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• User Programmable Safety Timer
• Ambient Temperature Range: -20°C to 70°C
• Thermally-Enhanced QFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• MD Players, Blue-Tooth Headsets and MP3 Players
• Portable Instruments
• PDAs, Cell Phones and Smart Phones
• Stand-Alone 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”
Ordering Information
PART # (NOTE)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-FREE)
PKG.
DWG. #
ISL6298CR4Z 6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4
ISL6298CR4Z-T 6298CR4Z 16 Ld 4x4 QFN Tape and Reel
ISL6298-2CR3Z 982Z -20 to 70 10 Ld 3x3 DFN L10.3x3
ISL6298-2CR3Z-T 982Z 10 Ld 3x3 DFN Tape and Reel
ISL6298-2CR4Z 6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4
ISL6298-2CR4Z-T 6298CR4Z 16 Ld 4x4 QFN Tape and Reel
NOTE: Intersil Pb-free plus anneal 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.
Pinouts
ISL6298 (16 LD QFN)
TOP VIEW
ISL6298 (10 LD DFN)
TOP VIEW
1
3
4
15
VIN
FAULT
STATUS
TIME
VIN
VIN
VBAT
VBAT
16 14 13
2
12
10
9
11
6578
VBAT
TEMP
IMIN
IREF
GND
V2P8
EN
TOEN
VIN
FAULT
STATUS
TIME
GND
VBAT
TEMP
IREF
V2P8
EN
2
3
4
1
5
9
8
7
10
6
Data Sheet
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004-2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
March 9, 2006
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