廬
ISL6293
Data Sheet
October 5, 2004
FN9180.0
P R E L I M I N A RY
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擄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
鈥?Complete Charger for Single-Cell Li-ion/Polymer Batteries
鈥?Accept Two Power Sources
鈥?Low Component Count
鈥?Integrated Pass Element
鈥?Integrated Charge-Current Sensor with 10% Accuracy
鈥?No External Blocking Diode Required
鈥?Charge Current Thermal Foldback for Thermal
Protection
鈥?28V Maximum Voltage for the Cradle Input
鈥?Charge Indication
鈥?Adapter Presence Indication
鈥?Less than 1碌A(chǔ) Leakage Current off the Battery when No
Input Power Attached
鈥?Ambient Temperature Range: -40擄C to 85擄C
鈥?Thermally-Enhanced 3x3 DFN Package
鈥?Pb-free Available
Applications
鈥?Smart Handheld Devices
鈥?Cell Phones, PDAs, MP3 Players
鈥?Digital Still Cameras
鈥?Handheld Test Equipment
Ordering Information
PART #
ISL6293-2CR
ISL6293-2CRZ (Note)
ISL6293-2CR-T
ISL6293-2CRZ-T (Note)
TEMP.
RANGE (擄C)
-40 to 85
-40 to 85
PACKAGE
PKG.
DWG. #
Related Literature
鈥?Technical Brief TB363 鈥淕uidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)鈥?/div>
鈥?Technical Brief TB389 鈥淧CB Land Pattern Design and
Surface Mount Guidelines for QFN Packages鈥?/div>
10 Ld 3x3 DFN L10.3x3
10 Ld 3x3 DFN L10.3x3
(Pb-free)
10 Ld 3x3 DFN Tape and Reel
10 Ld 3x3 DFN Tape and Reel (Pb-free)
Pinout
ISL6293-2 (DFN)
TOP VIEW
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.
CRDL
USB
PPR
CHG
EN
1
2
3
4
5
10
BAT
9
8
7
6
ICDL
GND
USBP
IUSB
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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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.
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