At the heart of the circuit is one microchip MCP73831, available in SOT-23-5 package. MCP73831 is a highly advanced linear charge management controller for use in space-limited, cost-sensitive ...

The charger’s electronics consist of a small 5-V/500-mA solar panel (SP1) linked to a Li-ion battery charger circuit built around the dedicated Li+ charge controller chip MAX1555 ... 1 depicts the ...