This app note discusses how to use the Atmel® EVK527 evaluation kit to
charge Lithium-Ion (Li-Ion) batteries using USB connection as power supply:
This document (PDF!) describes an application running on the Atmel EVK527 evaluation kit. The EVK527 is dedicated to the
Atmel ATmega16/32U4.
The USB offers a 5V power supply on the VBUS pin. The available current range is from 100mA to 500mA. This is
enough to charge a Li-Ion battery cell.
A Li-Ion cell needs an accurate control of voltage and current during charge.
ATmega16/32U4 offers a USB full speed interface, PWM channels and 10-bit ADC channels. All these features are
used to perform a Li-Ion battery charger via USB.