公开(公告)号：US10103616B1

公开(公告)日：2018-10-16

申请号：US15878483

申请日：2018-01-24

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Kun-Yu Lin ,  Tzu-Chen Lin ,  Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H02M1/08 ,  H02M3/335

Abstract: A flyback power converter circuit includes: a transformer, including a primary winding coupled to an input power and a secondary winding coupled to an output node; a primary side switch coupled to the primary winding for switching the input power to generate an output power on the output node through the secondary winding; a clamping circuit including an auxiliary switch and an auxiliary capacitor which are connected in series to form an auxiliary branch which is connected with the primary winding in parallel; and a conversion control circuit adjusting an auxiliary dead time according to a primary side switch related signal and a switching voltage related signal such that the primary side switch is zero voltage switching at a time point when the primary side switch is turned ON.

公开(公告)号：US20180286609A1

公开(公告)日：2018-10-04

申请号：US15871896

申请日：2018-01-15

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H01H47/00 ,  G01R31/08 ,  G01R19/10

Abstract: A power transmission apparatus includes a power delivery unit generating a power, a load unit receiving the power, a cable, at least a connector, at least a power switch, and a communication interface. The power delivery unit and the load unit is coupled by the connector and the cable, and the power is delivered through the cable and the connector. A voltage threshold is determined according to a delivery current of the power or a load current of the load unit. When a voltage difference between a delivery voltage of the power and a load voltage of the load unit is larger than the voltage threshold, the power switch is turned OFF, wherein information of one of the delivery voltage, the load voltage, the delivery current, and/or the load current is provided through the communication interface.

公开(公告)号：US20180233926A1

公开(公告)日：2018-08-16

申请号：US15865224

申请日：2018-01-08

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang

IPC: H02J7/00 ,  H01M10/44

CPC classification number: H02J7/007 ,  H01M10/425 ,  H01M10/44 ,  H01M10/46 ,  H01M2010/4271 ,  H01M2010/4278 ,  H02J7/0004 ,  H02J7/0065 ,  H04B3/54 ,  H04B3/548

Abstract: A rechargeable battery is coupled to a power delivery unit or an external load unit. In a charging mode, the power delivery unit converts an input power to a converted voltage and/or current. A charging circuit converts the converted voltage and/or current to a charging voltage and/or current for charging the rechargeable battery. Power data is communicated between the power delivery unit and the rechargeable battery by: 1) the power delivery unit adjusting the converted voltage, wherein the power data is expressed by plural voltage levels of the converted voltage; and/or 2) the rechargeable battery adjusting a battery input current, wherein the power data is expressed by plural current levels of the battery input current. At least one of the converted voltage, the converted current, the charging voltage, or the charging current is adjusted according to the power data.

公开(公告)号：US20170310129A1

公开(公告)日：2017-10-26

申请号：US15287961

申请日：2016-10-07

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Pei-Yu Chiang

IPC: H02J7/00

CPC classification number: H02J7/0021 ,  H02J7/0045 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/0072 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/0096

Abstract: The present invention provides a charging control method for controlling a power delivery unit to supply output power to a mobile unit, wherein the output power includes a DC output voltage and/or a DC output current. The method includes: receiving a power delivery configuration by the power delivery unit, wherein the power delivery configuration at least defines at least one execution time period and plural voltage(s) and/or current(s); the power delivery unit regulates the DC output voltage and/or DC output current according to the power delivery configuration during the at least one execution time period such that the DC output voltage and/or DC output current correspond to the power delivery configuration.

公开(公告)号：US20170310122A1

公开(公告)日：2017-10-26

申请号：US15390511

申请日：2016-12-25

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Chih-Yuan Hsu

IPC: H02J7/00

CPC classification number: H02J7/007 ,  H02J7/0045 ,  H02J7/0052 ,  H02J2007/0059 ,  H02J2007/0062

Abstract: The present invention provides a charging apparatus, a charging control circuit, and a charging control method. The charging apparatus includes a power conversion circuit for generating a DC output voltage and charging a battery by a DC output current, and a charging control circuit for controlling the power conversion circuit. When the DC output voltage or the battery voltage rises to a first reference threshold voltage, the DC output current is adjusted downward by a current down step, and when the DC output voltage or the battery voltage falls to a second reference threshold voltage, the DC output current is adjusted upward by a current up step.