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    SWITCHING CAPACITOR POWER CONVERSION CIRCUIT AND CONVERSION CONTROL CIRCUIT AND CONTROL METHOD THEREOF
    31.
    发明申请
    SWITCHING CAPACITOR POWER CONVERSION CIRCUIT AND CONVERSION CONTROL CIRCUIT AND CONTROL METHOD THEREOF 有权

    公开(公告)号：US20220131461A1

    公开(公告)日：2022-04-28

    申请号：US17407045

    申请日：2021-08-19

    Applicant: Richtek Technology Corporation

    Inventor： Tsung-Wei Huang ,  Ding-Yu Wei

    IPC: H02M3/07 ,  H02M1/088

    Abstract: A switching capacitor power conversion circuit includes: a conversion capacitor, plural conversion transistors and an output capacitor connected to an output node. In a switching conversion mode, the switching capacitor power conversion circuit switches connections of the capacitor to convert the input power into an output power on an output node. During a first pre-charging period, a first conversion transistor is controlled to provide a first pre-charging current to pre-charge the conversion capacitor to a predetermined voltage level, and the output capacitor is prevented from being charged. During a second pre-charging period, a second conversion transistor is controlled to provide a second pre-charging current to pre-charge the output capacitor to the predetermined voltage level, and the second pre-charging current supplies a load current to a load circuit.

    Charger circuit and capacitive power conversion circuit and charging control method thereof
    32.
    发明授权
    Charger circuit and capacitive power conversion circuit and charging control method thereof 有权

    公开(公告)号：US10797500B2

    公开(公告)日：2020-10-06

    申请号：US15639732

    申请日：2017-06-30

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Tsung-Wei Huang ,  Shun-Yu Huang

    IPC: H02J7/00 ,  H02J7/34 ,  H02M3/06 ,  H02M3/07

    Abstract: A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit and a capacitive power conversion circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches and being coupled with one or plural conversion capacitors, a regulation switch, and a conversion control circuit. In a current scaled-up charging mode, the DC current is regulated, and the conversion control circuit controls the connection of the plural conversion capacitors such that the charging current is scaled-up of the DC current substantially by a predetermined current scale-up factor. In a constant voltage linear charging mode, the conversion control circuit linearly controls the regulation switch to regulate the level of the charging voltage to a predetermined constant voltage level.

    MULTI-LEVEL SWITCHING POWER CONVERTER, AND CONTROLLER CIRCUIT AND CONTROL METHOD THEREOF
    33.
    发明申请
    MULTI-LEVEL SWITCHING POWER CONVERTER, AND CONTROLLER CIRCUIT AND CONTROL METHOD THEREOF 审中-公开

    公开(公告)号：US20200161967A1

    公开(公告)日：2020-05-21

    申请号：US16680599

    申请日：2019-11-12

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

    IPC: H02M3/07 ,  H02M1/14

    Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.

    MULTI-LEVEL SWITCHING POWER CONVERTER, AND CONTROLLER CIRCUIT AND CONTROL METHOD THEREOF
    34.
    发明申请
    MULTI-LEVEL SWITCHING POWER CONVERTER, AND CONTROLLER CIRCUIT AND CONTROL METHOD THEREOF 审中-公开

    公开(公告)号：US20200161959A1

    公开(公告)日：2020-05-21

    申请号：US16653940

    申请日：2019-10-15

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

    IPC: H02M1/08 ,  H02M3/07

    Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.

    Charger circuit and power conversion circuit thereof
    36.
    发明授权
    Charger circuit and power conversion circuit thereof 有权

    公开(公告)号：US10177420B2

    公开(公告)日：2019-01-08

    申请号：US15628109

    申请日：2017-06-20

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Tsung-Wei Huang ,  Yu-Huei Lee ,  Chun-Jen Shih ,  Ruei-Hong Peng

    IPC: H02J7/04 ,  H02J7/16 ,  H01M10/44 ,  H02J7/00 ,  G05F1/40 ,  H02M3/158

    Abstract: A charger circuit for providing a charging power to a battery includes a power delivery unit and a power conversion circuit. The power conversion circuit includes at least one conversion switch coupled to an inductor, a front stage switch conducting a DC power generated by the power delivery unit to generate a mid-stage power, and a direct charging switch. In a switching charging mode, the conversion switch converts the mid-stage power to the charging current onto a charging node. In a direct charging mode, the power delivery unit regulates the DC current, and the front stage switch and the direct charging switch conduct the DC current onto the charging node. The body diodes of the front stage switch and the direct charging switch are reversely coupled, and the body diodes of the front stage switch and the conversion switch are reversely coupled, for blocking the parasitic body current.

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