ATAVRSB201 -2: Dual Li-Ion Smart Charger

This document describes an example implementation of a smart battery for the Atmel® SB201-1 and SB201-2 reference designs. The implementation demonstrates how to use the ATmega8HVA/16HVA AVR® to gain optimal safety and accuracy for a Lithium-Ion rechargeable battery-pack. All code is freely available to allow for easy evaluation and further development.

The SB201-1 targets single cell smart batteries, while the SB201-2 targets dual cell smart batteries. The two products are based on the same firmware source code, compiled differently for each target-hardware. SB201 hardware for evaluation of the ATmega8HVA/16HVA device and the SB201 firmware are available as ATAVRSB201 – this kit includes both the SB201-1 and the SB201-2 hardware.

Features

• Over-voltage protection
  
• Under-voltage protection
  
• Protection against excessive discharge and charge currents
  
• Temperature checks
  
• High accuracy voltage and current measurements
  
• Half-duplex 1-wire UART
  
• Command set based on Smart Battery Specification
  
• AES based authentication