基于pic16c73a电池充电器选择参考设计
WiththePICREF-5ReferenceDesign,thedesignengineerwillbeableto
quicklydevelopanSMBusLevel3SmartBatteryCharger/Selector.
ThedesignconsistsofaPIC16C73Amicrocontrollerthathandlesallthe
hardwarecontrolandcommunicationstomeetboththeSMBusLevel3
SmartBatteryChargerSpecification1.0andSmartBatteryandSmart
BatterySelectorSpecification1.0.ItcombinestheSmartBatteryCharger
andSmartBatterySelectorundersingle-chipcontrol.
Thehardwaresupportsselectionandchargingofuptotwoindependant
batterypacks.ThePICREF-5ReferenceDesignincludesmanysafety
featuressuchasPIC16C73Acontrolselectionofasinglebatterypack,so
thattheunselectedbatterycannotbeactiveonthebus.Thiseliminates
crosscontrolandcrosscommunicationsituations,whichmayleadto
unexpectedoperation.Asanaddedsafetyfeature,thermistormonitoringis
alwaysavailableonbothbatterypacks,regardlessoftheselectedbattery
pack.
Immediateswitchingofthepowersourceisimplementedbyuseofthree
diodemodeoperation.IfACpowerortheactivebatterypackisremoved
fromthesystem,thereisnoswitchovertime.Theselectoralsosupports
end-of-dischargedetectionofthebatterypack,sothatswitchingtoan
alternatepowersourceautomaticallytakesplace.
Thechargercanactasamastertoinitiatecharging,whichallowsthe
chargertopollbatteriesforcharginginformation.ThePIC16C73AthenPICREF-5SMBusLevel-3BatteryCharger/SelectorReferenceDesignBasedonthePIC16C73ANEWWallAdapterVDCVCHGVOUTSystemCharger+24VDCCircuitryPowerCNTLVDCVB1VB1VB2Smar
