ISL9220A: Switching Charger for 1-Cell and 2-Cell Li-ion Batteries

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.

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
Applications
  • PDAs and Smart Phones
  • MP3 and Portable Media Players
  • Handheld GPS Devices
  • Digital Still Cameras
  • Industrial Handheld Scanners
Typical Diagram
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL9220, ISL9220A DatasheetPDF17 Nov 2014507 KB
Design Files
TitleTypeUpdatedSizeOther Languages
ISL9220IRTZEVAL1Z Design FilesZIP----186 KB
User Guides
TitleTypeUpdatedSizeOther Languages
ISL9220IRTZEVAL1Z User GuidePDF13 Nov 2014316 KB
White Papers
TitleTypeUpdatedSizeOther Languages
Five Easy Steps to Create a Multi-Load Power SolutionPDF30 Jan 2017502 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL9220AIRTZ-T20 Ld TQFN T+R0.044203260RoHS
ISL9220AIRTZ-T7A20 Ld TQFN T+R0.044203260RoHS
Datasheet
ISL9220, ISL9220A Datasheet 17 Nov 2014
Other
ISL9220IRTZEVAL1Z User Guide 13 Nov 2014
ISL9220A
ISL9220IRTZEVAL1Z Design Files ----
20 Ld TQFN T+R ISL9220A
Five Easy Steps to Create a Multi-Load Power Solution 30 Jan 2017