公开(公告)号：US20250038574A1

公开(公告)日：2025-01-30

申请号：US18626406

申请日：2024-04-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Youso Cheon ,  Seokhyeong Ham ,  Arom Lee

IPC: H02J50/12 ,  H02J7/00

Abstract: A wireless charging circuit wirelessly receives power and includes a power receiving circuit that includes an inductor and a capacitor, a rectifier circuit that rectifies an alternating current voltage received from the power receiving circuit and outputs a rectified voltage, a regulating circuit that outputs a charging voltage that charges a battery using the rectified voltage, an overvoltage protection circuit connected in parallel between the rectifier circuit and the regulating circuit, and a controller that detects the rectified voltage and controls the overvoltage protection circuit. The overvoltage protection circuit includes first and second overvoltage protection circuits. By separating turn-on holding times of the first and second overvoltage protection circuits, the wireless charging circuit is effectively protected from overvoltage and damage to the circuit due to heat generation is prevented.

公开(公告)号：US09939828B2

公开(公告)日：2018-04-10

申请号：US14800176

申请日：2015-07-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sungwoo Moon ,  Myeonglyong Ko ,  Dongjin Keum ,  Kyunggoo Moh ,  Pyungwoo Yeon ,  Youso Cheon

IPC: G05F1/56

CPC classification number: G05F1/56 ,  H02M3/156

Abstract: 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.