The ISL9220IRTZEVAL1Z evaluation board is used to evaluate 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 a 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 a thermally enhanced QFN package.
- 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 smartphones
- MP3 and portable media players
- Handheld GPS devices
- Digital still cameras
- Industrial handheld scanners
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Disclaimer: THIS MATERIAL IS PROVIDED “AS-IS” FOR EVALUATION PURPOSES ONLY. RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (collectively, “Renesas”) DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY. Renesas provides evaluation platforms and design proposals to help our customers to develop products. However, factors beyond Renesas' control, including without limitation, component variations, temperature changes and PCB layout, could significantly affect the product performance. It is the user’s responsibility to verify the actual circuit performance.