Rohm Co., Ltd.

Takeshi Seike

Yoshihiro Ikefuji

Yusuke Yoshii

A semiconductor device includes: a capacitor connection terminal configured to enable an external connection of a capacitor; a charger configured to charge the capacitor; an ESD protector connected to the capacitor connection terminal; and a current injector including a same component which is the same as the ESD protector and is configured to inject a current based on a leakage current flowing through the same component into a charging path where charging is performed by the charger.

Semiconductor device

This power transmission apparatus transmits power to a power reception apparatus by means of a magnetic field resonance system by supplying an output AC voltage (V) of a class E amplifier to a power-transmission side resonance circuit (TT). Before the transmission of power, the output AC voltage (V) of the class E amplifier is divided, and a voltage obtained by the division is supplied to the power-transmission side resonance circuit (TT). A current amplitude detection value of a power-transmission side coil (T) at this time is obtained as an evaluation value, and whether to permit execution of power transmission is controlled on the basis of the evaluation value, through determination as to whether a foreign object is present or not.

Growing community of inventors

Kyoto, Japan

Takeshi Seike