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AVR459: SB200 Hardware User's Guide
Features
? Full evaluation of Atmel smart battery reference design.
? Socket for SB20x smart battery reference designs.
- TWI/ SMBus
interface for larger batteries.
- Development platform for AVR based smart batteries.
? Communication gateway between PC and smart battery.
- Single Wire UART for single and dual cell batteries.
TM
? Battery Charger.
- Charge with up to 19V and 2A.
- Auto-limitation of charging voltage and current.
8-bit
Microcontrollers
Application Note
- Auto-termination of charging when charging period expires.
? Adjustable Constant Current Load for battery discharging.
- Sink up to 4A continuous current.
- Auto-shut down if too hot.
1 Introduction
The SB200 is a development platform for SB20x smart battery reference designs,
which offers an easy way to start evaluation and hence development of smart
battery applications using Atmel ? AVR ? microcontrollers. The SB200 is not in itself
a reference design, but is intended to be used with e.g. SB201-1, which is a
reference design that demonstrates implementation of a single cell smart battery
(Li-Ion).
16340/CR123A battery cells can be inserted in the SB200 battery sockets, and a
SB20x is inserted in the dedicated daughter board socket. This forms a “battery
pack” with a given number of cells, safety protection and full battery capacity
monitoring capabilities. Alternately other cell types can be soldered into the SB200.
To simulate the use of the “battery pack” the SB200 features a Charger that can
charge the battery pack, and a Constant Current Load that can simulate an
application that draws power from the battery pack.
Figure 1-1. SB200 with two batteries and SB201-2 inserted.
Rev. 8132A-AVR-10/08
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