公开(公告)号：US20160190914A1

公开(公告)日：2016-06-30

申请号：US14981314

申请日：2015-12-28

Applicant: Samsung Electronics Co., Ltd. ,  Seoul National University R&DB Foundation

Inventor： Jin-Han KIM ,  Han Sol SEO ,  Bo Hyung CHO ,  Paul JANG ,  Sang Woo KANG

IPC: H02M1/42 ,  H02M1/44 ,  H02M7/06

CPC classification number: H02M1/4225 ,  H02M1/44 ,  H02M2001/123 ,  Y02B70/126

Abstract: A power factor correction circuit and an electronic product including the same are disclosed. This technology configures a bridgeless circuit with no rectifier diode by using an additional switch, eliminating conduction loss due to the diode and reducing common mode EMI noise of the power factor correction circuit. A power factor correction circuit includes at least one inductor directly connected to an AC input stage, an output capacitor to smooth the output voltage, first switching elements to control current to store magnetic energy in the inductor, and a second switching element to maintain a substantially constant voltage between a ground voltage of an AC input stage and a ground voltage of an output stage.

Abstract translation: 公开了一种功率因数校正电路及包括该功率因数校正电路的电子产品。 该技术通过使用附加开关来配置无整流二极管的无桥电路，消除了由二极管引起的导通损耗并降低了功率因数校正电路的共模EMI噪声。 功率因数校正电路包括直接连接到AC输入级的至少一个电感器，用于平滑输出电压的输出电容器，第一开关元件以控制电流以在电感器中存储磁能;以及第二开关元件，用于维持基本上 交流输入级的接地电压与输出级的接地电压之间的恒定电压。

公开(公告)号：US20190245386A1

公开(公告)日：2019-08-08

申请号：US16266619

申请日：2019-02-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jihoon JUNG ,  Kangho BYUN ,  Paul JANG ,  Kiyoung KIM ,  Jaehyun PARK

IPC: H02J50/12 ,  H02M7/5387 ,  H02J50/90 ,  G01R19/00

CPC classification number: H02J50/12 ,  G01R19/0092 ,  H02J50/90 ,  H02M7/53871

Abstract: A wireless power transmission apparatus for wirelessly transmitting power to a wireless power reception apparatus is provided. The wireless power transmission apparatus includes a power transmitting circuit including a coil and at least one processor to control to transmit, via the power transmitting circuit, a pilot power with changing a frequency of the pilot power within a predetermined frequency range, obtain a magnitude of power wirelessly transmitted to a wireless power reception apparatus based on the transmitted pilot power, determine an operating frequency based on the obtained magnitude, and control to transmit, via the power transmitting circuit, a driving power having the operating frequency to drive the wireless power reception apparatus.

公开(公告)号：US20160285353A1

公开(公告)日：2016-09-29

申请号：US14965346

申请日：2015-12-10

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SNU R&DB FOUNDATION

Inventor： Jin Han KIM ,  Han Sol SEO ,  Bo-Hyung CHO ,  Sang-Woo KANG ,  Paul JANG

IPC: H02M1/08 ,  H02M1/42 ,  H02M7/06 ,  H03K17/687 ,  H02M7/217

CPC classification number: H02M1/4208 ,  H02M1/4225 ,  H03K17/162 ,  H03K17/302 ,  Y02B70/126

Abstract: The present disclosure relates generally to a switch driving circuit and power factor correction circuit having the same, and more particularly, to a technology to provide a negative offset using Zener diodes to prevent malfunctions in driving a switch. The switch driving circuit to operate a switch implemented with a Field Effect Transistor (FET) includes a first Zener diode connected to a control input end of the switch; a capacitor connected in parallel with the first Zener diode; and second and third Zener diodes for providing a negative offset to fix a voltage applied between the gate and source of the switch to a negative value.

Abstract translation: 本公开一般涉及具有该开关驱动电路和功率因数校正电路的开关驱动电路和更具体地涉及使用齐纳二极管提供负偏移以防止驱动开关中的故障的技术。 开关驱动电路来操作由场效应晶体管（FET）实现的开关，包括连接到开关的控制输入端的第一齐纳二极管; 与第一齐纳二极管并联连接的电容器; 以及用于提供负偏置以将施加在开关的栅极和源极之间的电压固定为负值的第二和第三齐纳二极管。