This application note provides the schematics, software listings, and circuit board layout for a PIC16C73 based Smart Battery Charger. The Demo Board, DC101, is available to selected customers through Linear Tech- nology Corp. product marketing. The DC101 (Figure 1) is the Smart Battery Charger (SBC) portion of a Smart Battery System. A simplified block diagram of a Smart Battery System is shown in Figure 3 (refer to "The Smart Battery Charger Specifi- cation," Duracell). AN667 Smart Battery Charger with SMBus Interface The Smart Battery (SB) contains circuitry which pro- Authors: Laszlo Kiraly, Linear Technology vides charging information to the SBC. The SBC receives this information in terms of ChargingVoltage(), Robert Schreiber, Microchip Technology ChargingCurrent(), and AlarmWarning() commands from the SB. The SBC and SB communicate via the ……