带有SMBus接口智能电池充电器

Thisapplicationnoteprovidestheschematics,software

listings,andcircuitboardlayoutforaPIC16C73based

SmartBatteryCharger.TheDemoBoard,DC101,is

availabletoselectedcustomersthroughLinearTech-

nologyCorp.productmarketing.

TheDC101(Figure1)istheSmartBatteryCharger

(SBC)portionofaSmartBatterySystem.Asimplified

blockdiagramofaSmartBatterySystemisshownin

Figure3(referto"TheSmartBatteryChargerSpecifi-

cation,"Duracell).AN667SmartBatteryChargerwithSMBusInterfaceTheSmartBattery(SB)containscircuitrywhichpro-Authors:LaszloKiraly,LinearTechnologyvidescharginginformationtotheSBC.TheSBCreceivesthisinformationintermsofChargingVoltage(),RobertSchreiber,MicrochipTechnologyChargingCurrent(),andAlarmWarning()commandsfromtheSB.TheSBCandSBcommunicateviathe