Switching Charger Evaluation Board for 1-Cell Li-ion Batteries


The ISL9220IRTZEVAL1Z is an evaluation tool for the ISL9220 battery charger for 1-cell Li-ion and Li-Polymer batteries.

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

  • Operating input voltage range: 4.5V to 14V
  • Up to 2A charge current
  • Two status outputs
  • 1.2MHz switching frequency
  • Connector, test point and jumper


  • PDAs and smart phones
  • MP3 and portable media players
  • Handheld GPS devices
  • Digital still cameras
  • Industrial handheld scanners

ISL9220IRTZEVAL1Z Switching Charger Eval Board

ISL9220IRTZEVAL1Z Switching Charger Eval Board


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