DC-DC CONVERTER, POWER RECEIVING DEVICE, AND POWER FEEDING SYSTEM

摘要

The present invention provides a circuit capable of keeping input impedance constant. Further, provided is a circuit which can contribute to improvement in power feeding efficiency in power feeding by a magnetic resonance method. A voltage (a former voltage) proportional to a direct-current voltage input to a DC-DC converter from the outside and a voltage (a latter voltage) proportional to a current input from the outside are detected, and the ratio of the former voltage and the latter voltage is held constant based on the detected voltages. Accordingly, the input impedance can be kept constant. Further, impedance conversion is performed in the DC-DC converter. Thus, even when a battery in which power feeding is performed exists on an output side of the DC-DC converter, input impedance can be kept constant. Consequently, power can be supplied to a power receiving device including the DC-DC converter and the battery with high power feeding efficiency by a magnetic resonance method.;COPYRIGHT KIPO 2020