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    Voltage supply circuits and controlling methods therefor
    11.
    发明授权
    Voltage supply circuits and controlling methods therefor 有权

    公开(公告)号：US10389344B2

    公开(公告)日：2019-08-20

    申请号：US15038588

    申请日：2015-01-14

    Applicant: MediaTek Inc.

    Inventor： Chien-Wei Kuan ,  Yen-Hsun Hsu ,  Tun-Shih Chen

    IPC: G05F1/46 ,  G05F1/00 ,  G05F1/26 ,  G05F1/635 ,  H02M3/158 ,  H03K17/00 ,  H02M1/00

    Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of operating at a first mode and generates a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of drier circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality driver circuits are coupled to the plurality of inductors respectively. The inductance value of a first inductor among the plurality of inductors is greater than the inductance values of the other inductor.

    DC-DC converter with pull-up or pull-down current and associated control method
    12.
    发明授权
    DC-DC converter with pull-up or pull-down current and associated control method 有权

    公开(公告)号：US10122258B2

    公开(公告)日：2018-11-06

    申请号：US15826715

    申请日：2017-11-30

    Applicant: MEDIATEK INC.

    Inventor： Shih-Mei Lin ,  Chien-Wei Kuan ,  Chien-Lung Lee ,  Che-Hao Meng

    IPC: H02M3/158 ,  H02M1/14 ,  H02M1/08 ,  H02M1/00 ,  G05F1/618 ,  H02M3/156

    Abstract: A DC-DC converter includes an inductor, a switch module, and a pull-up circuit or a pull-down circuit. The inductor has a first node and a second node, and the second node is coupled to an output node of the DC-DC converter. The switch module is arranged for selectively connecting an input voltage or a ground voltage to the first node of the inductor according to a driving signal. The pull-up circuit is arranged for selectively providing a first current to the output node of the DC-DC converter. The pull-down circuit is arranged for selectively sinking a second current from the output node of the DC-DC converter. In addition, the first current or the second current is determined based on an inductor current flowing through the inductor.

    POWER CONVERSION CIRCUIT AND ASSOCIATED OPERATING METHOD
    14.
    发明申请
    POWER CONVERSION CIRCUIT AND ASSOCIATED OPERATING METHOD 有权

    公开(公告)号：US20180054121A1

    公开(公告)日：2018-02-22

    申请号：US15461559

    申请日：2017-03-17

    Applicant: MEDIATEK Inc.

    Inventor： Tso-Min Chen ,  Chien-Wei Kuan ,  Yen-Hsun Hsu

    IPC: H02M3/158 ,  H02M1/08

    CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M2001/0009 ,  H02M2001/0048 ,  H02M2001/0058

    Abstract: A power conversion circuit includes an input terminal, a first switching element, a second switching element, a third switching element, a fourth switching element, a capacitor; an inductor; and a controller configured to control the switching elements to be switched ON/OFF, such that a voltage at the load is regulated by repetitively (1) charging the inductor with a first current before charging the capacitor causing a second current to flow in the inductor and (2) charging the inductor with a third current before discharging the capacitor causing a fourth current to flow in the inductor.

    REGULATOR FOR DC-DC HYBRID-MODE POWER REGULATION
    15.
    发明申请
    REGULATOR FOR DC-DC HYBRID-MODE POWER REGULATION 审中-公开

    公开(公告)号：US20170310211A1

    公开(公告)日：2017-10-26

    申请号：US15334332

    申请日：2016-10-26

    Applicant: MEDIATEK Inc.

    Inventor： Shan-Fong Hong ,  Chih-Chen Li ,  Kuan-Yu Chu ,  Chien-Wei Kuan ,  Yen-Hsun Hsu

    IPC: H02M3/04 ,  H02M1/08 ,  H02M1/00

    CPC classification number: H02M3/04 ,  H02M1/08 ,  H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

    Abstract: The invention provides a regulator for DC-DC hybrid-mode power regulation of an output voltage and a load current. The regulator may include a controller and a back-end circuit. The controller controls the output voltage and the load current by charging a connection node when a driving signal is at an on-level, and stopping charging the connection node when the driving signal is at an off-level. The back-end circuit is coupled to the controller, capable of switching between a first mode and a second mode to control transition of the driving signal by different schemes. The back-end circuit switches from the second mode to the first mode when a mode-switch criterion is satisfied, and whether the mode-switch criterion is satisfied is independent of a measurement of the output voltage.

    Supply modulator, modulated power supply circuit, and associated control method
    17.
    发明授权
    Supply modulator, modulated power supply circuit, and associated control method 审中-公开

    公开(公告)号：US10673385B2

    公开(公告)日：2020-06-02

    申请号：US16040594

    申请日：2018-07-20

    Applicant: MEDIATEK Inc.

    Inventor： Shih-Mei Lin ,  Che-Hao Meng ,  Da-Wei Sung ,  Chien-Wei Kuan

    IPC: H03F3/217 ,  H03F1/02 ,  H02M3/158 ,  G05F1/565 ,  H02M3/335

    Abstract: A supply modulator, a modulated power supply circuit, and associated control method are provided. The modulated power supply circuit includes the supply modulator and a DC-DC voltage converter, and the supply modulator includes a linear amplifier and a switching converter. The linear amplifier generates an AC component of a modulated voltage according to a regulated voltage and an envelope tracking signal. The supply voltage is converted to the regulated voltage by the DC-DC voltage converter, and the regulated voltage is greater than or less than the supply voltage. The switching converter includes a step-down circuit and a path selection circuit. The path selection circuit selects one of the supply voltage and the regulated voltage as a DC input voltage. The step-down circuit converts the DC input voltage to a DC component of the modulated voltage which is less than the DC input voltage.

    Apparatus for performing hybrid power control in an electronic device with aid of multiple switches corresponding multi-purpose usage
    20.
    发明授权
    Apparatus for performing hybrid power control in an electronic device with aid of multiple switches corresponding multi-purpose usage 有权

    公开(公告)号：US10230259B2

    公开(公告)日：2019-03-12

    申请号：US15158567

    申请日：2016-05-18

    Applicant: MEDIATEK INC.

    Inventor： Nien-Hui Kung ,  Chien-Wei Kuan ,  Yen-Hsun Hsu

    IPC: H02J7/04 ,  H02J7/00 ,  B60L11/18 ,  H02M3/156 ,  H02M3/158 ,  H02J7/02 ,  H05B33/08

    Abstract: An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a plurality of terminals that are positioned on the charger chip, where the plurality of terminals may include a third terminal and a fourth terminal; a plurality of switching units, positioned on the charger chip; and a control circuit, positioned on the charger chip and coupled to the plurality of switching units. The third terminal and the fourth terminal may be arranged for installing an inductor, where the inductor may be utilized by the charger when the control circuit configures the charger into any of at least two hardware configurations within a plurality of hardware configurations.

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