Verification and implementation of the non-inverting buck-boost converter in energy-harvesting battery charger

This paper presents the verification and implementation of non-inverting buck-boost converter in the application of energy-harvesting battery charger which is widely used in multiple power source embedded system. Simplified models for PV and rechargeable battery have been used for theoretical analyzing. Buck and boost topologies have been analyzed to obtain the MPP (Maximum Power Point) under different supply voltages and several Power-Duty cycle curves have been obtained. The combination of the curves verifies the feasibility of the usage of non-inverting buck-boost converter in such application. Hardware circuit is also constructed and the experimental results match the theoretical data precisely.