ISL6293_06 Datasheet, PDF (1/8 Pages) Intersil Corporation – Li-ion/Li Polymer Battery Charger Accepting Two Power Sources

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Data Sheet
January 4, 2006
ISL6293
FN9180.1
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.
Ordering Information
TEMP.
PART RANGE
PART NUMBER MARKING (°C)
PACKAGE
PKG.
DWG. #
ISL6293-2CR 93-2
-40 to 85 10 Ld 3x3 DFN L10.3x3
ISL6293-2CR-T 93-2
10 Ld 3x3 DFN Tape and Reel
ISL6293-2CRZ 932Z
(Note)
-40 to 85 10 Ld 3x3 DFN L10.3x3
(Pb-free)
ISL6293-2CRZ-T 932Z
(Note)
10 Ld 3x3 DFN Tape and Reel
(Pb-free)
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.
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 Plus Anneal Available (RoHS Compliant)
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”
Pinout
ISL6293-2
(10 LD 3X3 DFN)
TOP VIEW
CRDL 1
USB 2
PPR 3
CHG 4
EN 5
10 BAT
9 ICDL
8 GND
7 USBP
6 IUSB
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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