公开(公告)号：US20220345029A1

公开(公告)日：2022-10-27

申请号：US17739831

申请日：2022-05-09

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hangseok CHOI ,  Sangwoo KANG ,  Chuleun YUN

IPC: H02M1/32 ,  H02H7/12 ,  H02M1/00 ,  H02M3/158 ,  G09G3/3208

Abstract: An overcurrent protection device of a power supply is provided. The overcurrent protection device includes an inductor, a first switch, a second switch, a feedback controller, a pulse width modulation (PWM) controller, and an overcurrent protection controller. The inductor may be connected to an input terminal of the power supply to which a current is inputted from a power source. The first switch may be connected between an output terminal of the inductor and a ground. The second switch may be connected between the output terminal of the inductor and an output terminal of the power supply. The feedback controller may compare an output voltage of the power supply with an output voltage target value, and generate a control voltage based on a result of comparing the output voltage and the output voltage target value. The PWM controller may control switch-on and switch-off of the first and second switches, and control a peak current of the first switch based on the control voltage. The overcurrent protection controller may include a timing capacitor charged with a current source proportional to the control voltage, and generate an overcurrent control signal for driving the PWM controller based on the control voltage. The overcurrent protection controller may charge the timing capacitor by the current source during a first switching period in which the second switch is turned on. When an output current exceeds a predetermined level regardless of an input voltage from the power source, an operation of the power supply may be stopped based on the overcurrent control signal.

公开(公告)号：US20200381994A1

公开(公告)日：2020-12-03

申请号：US16885535

申请日：2020-05-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hangseok CHOI ,  Sangwoo KANG

IPC: H02M3/06 ,  H02J7/00 ,  H02M3/158 ,  G05F1/59 ,  H01M10/44 ,  H01M10/42

Abstract: An electronic device including a voltage divider adaptively changing a voltage division ratio is provided. The electronic device comprises a rechargeable battery; a connector configured to connected the electronic device with an external electronic device; a voltage divider comprising a plurality of capacitors and a plurality of switches for switching an electrical path between each of the plurality of capacitors and the rechargeable battery, wherein the voltage divider is configured to provide three or more voltage division ratios; and a processor operably coupled with the voltage divider and the connector, wherein the processor is configured to: receive an indicator indicating a first voltage of a first power from the external electronic device; select a voltage division ratio from the three or more division ratios, based at least in part on the indicator; and control the plurality of switches on the basis of the selected voltage division ratio, and wherein the voltage divider is configured to: charge a rechargeable battery with a second voltage by dividing the first voltage according to the selected voltage division ratio.