Samsung Electronics Co., Ltd.

Sungwoo Moon

Pyungwoo Yeon

Hyunsu Kim

Dongjin Keum

Kyunggoo Moh

Myeonglyong Ko

Youso Cheon

A first device wirelessly receives power from a second device including a second resonance circuit having a resonance frequency. The first device includes: a first resonance circuit having the resonance frequency, a first capacitor connected to the first resonance circuit at a first node, a rectifier configured to rectify an alternating current (AC) voltage apparent at a first node and oscillating at the resonance frequency, and a control circuit connected to the first capacitor, and configured to determine a first period based on feedback information to be provided to the second device, and alternately apply a first voltage and a second voltage higher than the first voltage to the first capacitor for the first period during a normal output mode.

Device and method providing feedback in wireless power transfer

A direct current (DC)-DC converting circuit includes a voltage converter generating a regulation current in response to a driving signal and generating an output voltage and an output current; an output voltage regulator regulating the output voltage and outputting a first control signal; a voltage limiter limiting a voltage value of the first control signal below a threshold value; a current sensor sensing an intensity of the regulation current and generating a second control signal having a voltage value corresponding to a value of the sensed intensity; and a driving signal generator generating the driving signal based on the first and second control signals, the first control signal having the voltage value below the threshold value.

DC-DC converting circuit and a power management chip package including the same

A voltage regulator includes a pass unit configured to transfer an input voltage to an output node as an output voltage according to a control signal, a voltage dividing unit configured to divide the output voltage to generate a divided output voltage, an error amplifying unit configured to output a comparison signal based on comparing a magnitude of the divided output voltage with a magnitude of a reference voltage, and a filter unit configured to filter noise included in the outputted comparison signal to generate the control signal. The filtered noise can correspond to noise included in the outputted comparison signal by transferring noise included in the input voltage to the error amplifying unit via the pass unit and the voltage dividing unit.

Growing community of inventors

Gyeonggi-do, South Korea

Sungwoo Moon