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1
FN9180.0
PRELIMINARY
ISL6293
Li-ion/Li Polymer Battery Charger
Accepting Two Power Sources
The ISL6293 is a fully integrated low-cost single-cell Li-ion or
Li-polymer battery charger. The charger accepts two power
inputs, normally one from a USB (Universal Serial Bus) port
and another one from a desktop cradle. The ISL6293 is an
ideal charger for smart handheld devices that need to
communicate with a personal computer via USB.
The ISL6293 features 28V and 7V maximum voltages for the
cradle and the USB inputs respectively. The 28V rating
allows low-cost adapters be safely used. When both inputs
are powered, the cradle input is used to charge the battery.
The charge current is independently programmable for both
inputs with two small resistors. One additional USBP pin
allows the selection of high-power or low-power port for the
USB input. The charger is self-protected against over
temperature. If the die temperature rises above 100°C, a
thermal foldback function reduces the charge current
automatically to prevent further temperature rise. The
charger preconditions the battery with low current when the
battery voltage is below 2.6V. The charger has two indication
pins. The PPR (power present) pin outputs an open-drain
logic LOW when either the cradle or the USB input power is
attached. The CHG (charge) pin is also an open-drain output
that indicates a logic LOW when the charge current is above
a minimum current level. When the charge current is below
the minimum current, the charger remains in operation but
the CHG pin indicates a logic HIGH signal. For simplicity, the
charger does not have re-charge or timer functions.
Features
Complete Charger for Single-Cell Li-ion/Polymer Batteries
Accept Two Power Sources
Low Component Count
Integrated Pass Element
Integrated Charge-Current Sensor with 10% Accuracy
No External Blocking Diode Required
Charge Current Thermal Foldback for Thermal
Protection
28V Maximum Voltage for the Cradle Input
Charge Indication
Adapter Presence Indication
Less than 1μA Leakage Current off the Battery when No
Input Power Attached
Ambient Temperature Range: -40°C to 85°C
Thermally-Enhanced 3x3 DFN Package
Pb-free Available
Applications
Smart Handheld Devices
Cell Phones, PDAs, MP3 Players
Digital Still Cameras
Handheld Test Equipment
Related Literature
Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Ordering Information
PART #
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6293-2CR
-40 to 85
10 Ld 3x3 DFN
L10.3x3
ISL6293-2CRZ (Note)
-40 to 85
10 Ld 3x3 DFN
(Pb-free)
L10.3x3
ISL6293-2CR-T
10 Ld 3x3 DFN Tape and Reel
ISL6293-2CRZ-T (Note)
10 Ld 3x3 DFN Tape and Reel (Pb-free)
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020C.
Pinout
ISL6293-2 (DFN)
TOP VIEW
2
3
4
1
5
9
8
7
10
6
BAT
ICDL
GND
USBP
IUSB
CRDL
USB
PPR
CHG
EN
Data Sheet
October 5, 2004
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. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.