Kontron COMe Ref.Carrier T6 - Manual (Page 35)

COMe Reference Carrier Type 6 / Connectors and Features
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5.16 SMART Battery
5.16.1 Introduction
The Core of the SBS is the dual Smart Battery System Manager LTC1760. On COMe Reference Carrier Type 6 both battery
connections are provided.
Smart Battery Systems have the ability to communicate with the application. Therefore the user gets information
about the current state of the battery. The interface for this communication is the System Management Bus (SMBus).
Standard Smart Batteries have a specified 5 pin header, connecting to the power lines and additionally this SMBus.
This standardization allows using all available kinds of standard Smart Batteries, which also applies to the COMe
Reference Carrier Type 6.
A typical SBS consists of a Smart Battery System Manager and a charger, which can communicate with the chipset
using the SMBus. If there is no software to control the SBS via SM-bus then the system is able to run in a stand alone
mode with reduced functionality, too.
The SBS was designed for the requirements of the COMe Reference Carrier Type 6. Additionally different kinds of Smart
Batteries can be used. That means different battery chemistry and cell configurations. But it must be ensured to use
standard Smart Batteries, which meet the SM-Bus standard.
Note: Please ensure that the input voltage of the COMe Reference Carrier Type 6 is higher than the charging voltage
of the connected SMART battery. Otherwise the battery can not be charged.
5.16.2 Possible Smart Batteries
The voltage of batteries must be within the voltage range of the carrier board. Therefore the best choice is a 3 cell
series Li-Ion or LiPo battery with 10.8V. Also 4 cell series batteries can be used, but then the input voltage of the
carrier board must exceed the charging voltage of the battery.
Battery Manufacturer:
http://www.moltechpower.co.uk/smart_standard_range.htm
e.g. NF2040, NL2044
http://www.inspired-energy.com/Standard_Products/standard_products.htm
http://www.emergingpower.com/oem/oem_standardpacks.htm
5.16.3 Smart Battery System Manager
The LTC1760 SBS Manager is a highly integrated level 3 battery charger and selector intended for products using dual
smart batteries. Three SMBus interfaces allow the LTC1760 to serve to the internal voltage and currents measured by
the batteries while allowing a SMBus Host to monitor either battery‟s status. Charging accuracy is determined by the
battery‟s internal voltage and current measurement, typically better then ±0,2%.