TIDUEB2A July 2022 – July 2022
This reference design is a smart high-efficiency charger design for dual smart battery packs of up to 100 Watt hours (Wh) implemented as 1S–5S Lithium-ion (Li-ion) batteries in a parallel configuration. To achieve this an onboard MCU manages the communication and safety features needed for the charging system to interface with a battery pack designed to the Smart Battery Data Specification Revision 1.1 (SBD 1.1). This communication allows the MCU to initialize two independent battery charger ICs to the correct charging parameters, as well as inhibit charging when the batteries are outside of safe specifications. This design also demonstrates a high-efficiency system power MUX for selecting between the input adapter and efficient discharge of the two smart batteries simultaneously. These features make this reference design highly applicable for portable medical devices, such as oxygen concentrators.