Abstract
Asingle integrated circuit package for controlling the charg- ing circuits of a battery charger. The single integrated circuit package comprises a microcontroller, switch mode power supply controller(s), analog to digital converter and analog input multiplexer which may be fabricated on a single integrated circuit dic, or the microcontroller may be on one integrated circuit die, and the remaining aforementioned circuits may be on a second integrated circuit die. The switch mode power supply controller is adapted for connection to a power converter which is used to control the voltage and/or current to a battery being charged. The power converter may also be on the same integrated circuit die as the switch mode power supply controller, or may be on a separate semicon- ductor die but included in the single integrated circuit package. Single or multiple batteries may be charged using charging algorithms specifically tailored to each battery. Batteries being charged may have a different capacity, voltage, or chemistry type. State of charge and time to reach a fully charged condition for each battery may also be different. 29 Claims, 7 Drawing Sheets —~112 BATTERY ——~118 one Ye 4 - 108 - | 1 fO DIGITAL] ANALOG INPUT ERTER MULTIPLEXER | NTROLLER ! t A ee eee 100