Battery Charger IC supplies up to 2 A charge current.September 8, 2010 -
Supplied in 4 x 4 mm TQFN package, ISL9220/ISL9220A can charge 1- and 2-cell Li-ion and Li-Polymer batteries. Synchronous PWM technology maximizes power efficiency, minimizing charge time and heat, while external resistors program fast charge and end-of-charge currents. Along with programmable charge timer and thermistor interface, features include 2 status outputs that can drive LEDs or be connected to host processor, 1.2 MHz switching frequency, and 0.5% charge voltage accuracy.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Intersil Corporation
1001 Murphy Ranch Rd.
Milpitas, CA, 95035
USA
ISL9220
The ISL9220, ISL9220A is a cost-effective and versatile battery charger for 1-cell and 2-cell Li-ion and Li-Polymer based portable applications.
The device features synchronous PWM technology, maximizing power efficiency, thus minimizing charge time and heat. The 1.2MHz switching frequency allows use of small external inductors and capacitors.
A simple charge current programming method is provided. External resistors program the fast charge and end-of-charge currents.
The two status outputs can be used to drive LEDs, or can be connected to host processor.
A programmable charge timer provides the ability to detect defective batteries, and provides a secondary method of detecting charge termination.
A thermistor interface is provided for battery presence detection, and for temperature qualified charging conditions.
Additional features include preconditioning of an over-discharged battery, automatic recharge, and thermally enhanced QFN package.
Product Information
Key Features
Highly Integrated Battery Charger IC
Charges 1- and 2-Cell Li-ion or Li-Polymer Batteries
Up to 2A Charge Current
Synchronous Buck Topology with Integrated Power FETs
1.2MHz Switching Frequency
0.5% Charge Voltage Accuracy
Programmable Input Current Limit with One External Resistor
Thermistor Interface for Battery Detection and Temperature Qualified Charging
Two Status Outputs
Programmable Charge Safety Timer
Short-Circuit and Thermal Protection
Small 4mmx4mm TQFN Package
-40°C to +85°C Operating Temperature Range
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