公开(公告)号：US09923465B2

公开(公告)日：2018-03-20

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 ,  H02M1/00

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.

公开(公告)号：US09899920B2

公开(公告)日：2018-02-20

申请号：US15172120

申请日：2016-06-02

Applicant: MEDIATEK INC.

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

IPC: G05F1/00 ,  G05F1/573 ,  H02M3/158 ,  H02M1/14 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M1/14 ,  H02M3/1584 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2001/0048 ,  H02M2003/1586 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A voltage regulator includes a plurality of output stages and a controller. The plurality of output stages are arranged for selectively enabling to generate output voltages and output currents or not according to a plurality of control signals, respectively. The controller is arranged for sensing the output currents of the output stages, and generating the control signals according to the sensed output currents. When the controller generates the control signals to reduce a quantity of the enabled output stages, the controller determines whether a summation of the sensed output currents is greater than a first threshold or not to determine whether to enable more output stages, then a period of time later, the controller selectively determines whether the summation of the sensed output currents is greater than a second threshold or not to determine whether to enable more output stages, wherein the second threshold is lower than the first threshold.

公开(公告)号：US20180048272A1

公开(公告)日：2018-02-15

申请号：US15492013

申请日：2017-04-20

Applicant: MEDIATEK Inc.

Inventor： Shih-Mei Lin ,  Chien-Wei Kuan ,  Chen-Yen Ho ,  Che-Hao Meng ,  Tso-Min Chen ,  Chia-Sheng Peng ,  Sheng-Hong Yan

IPC: H03F3/20 ,  H03F3/68 ,  H02M3/158

CPC classification number: H03F3/20 ,  H02M3/158 ,  H03F1/0227 ,  H03F3/195 ,  H03F3/245 ,  H03F3/68 ,  H03F2200/102 ,  H03F2200/105 ,  H03F2200/432

Abstract: Provided is a power supply circuit for a wireless mobile device having a plurality of power amplification components. The power supply circuit includes: a first DC-DC converter, for providing at least one constant output voltage (which is provided to the power amplification components) and/or at least one DC intermediate voltage; a second DC-DC converter, for providing a DC component of at least one time-varying output voltage; and at least one linear amplifier. When the at least one linear amplifier receives the at least one DC intermediate voltage from the first DC-DC converter, the at least one linear amplifier provides at least one AC component of the at least one time-varying output voltage. The DC component and the at least one AC component of the at least one time-varying output voltage are combined into the at least one time-varying output voltage and provided to the power amplification components.

公开(公告)号：US20170222556A1

公开(公告)日：2017-08-03

申请号：US15201626

申请日：2016-07-05

Applicant: MEDIATEK INC.

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

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/158 ,  G05F1/618 ,  H02M1/08 ,  H02M2001/0009 ,  H02M2001/0045 ,  H02M2003/1566

Abstract: A DC-DC converter includes an inductor, a switch module, a pull-up circuit and 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, at least one of the first current provided by the pull-up circuit and the second current sunk by the pull-down circuit is determined based on an inductor current flowing through the inductor.

公开(公告)号：US20170077811A1

公开(公告)日：2017-03-16

申请号：US15172120

申请日：2016-06-02

Applicant: MEDIATEK INC.

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

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M1/14 ,  H02M3/1584 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2001/0048 ,  H02M2003/1586 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A voltage regulator includes a plurality of output stages and a controller. The plurality of output stages are arranged for selectively enabling to generate output voltages and output currents or not according to a plurality of control signals, respectively. The controller is arranged for sensing the output currents of the output stages, and generating the control signals according to the sensed output currents. When the controller generates the control signals to reduce a quantity of the enabled output stages, the controller determines whether a summation of the sensed output currents is greater than a first threshold or not to determine whether to enable more output stages, then a period of time later, the controller selectively determines whether the summation of the sensed output currents is greater than a second threshold or not to determine whether to enable more output stages, wherein the second threshold is lower than the first threshold.

Abstract translation: 电压调节器包括多个输出级和控制器。 多个输出级被布置用于分别根据多个控制信号选择性地产生输出电压和输出电流。 控制器被布置用于感测输出级的输出电流，并根据感测的输出电流产生控制信号。 当控制器产生控制信号以减少使能的输出级的数量时，控制器确定所感测的输出电流的总和是否大于第一阈值，以确定是否启用更多的输出级，然后是一段时间 之后，控制器选择性地确定所感测的输出电流的总和是否大于第二阈值，以确定是否启用更多输出级，其中第二阈值低于第一阈值。

公开(公告)号：US09559583B2

公开(公告)日：2017-01-31

申请号：US14153405

申请日：2014-01-13

Applicant: MediaTek Inc.

Inventor： Hung-chih Lin ,  Hung-I Wang ,  Hao-Ping Hong ,  Chien-Wei Kuan ,  Yung-Chih Yen

IPC: H02M7/539 ,  H02M3/156

CPC classification number: H02M3/156 ,  H02M3/1563

Abstract: A power converter includes a wave generator, a low pass filter, a first control circuit, and a second control circuit. The wave generator receives an input voltage, and converts the input signal into a wave signal according to a first control signal and a second control signal. The low pass filter filters the wave signal to generate an output voltage. The first control circuit generates the first control signal according to the wave signal and the output voltage. The second control circuit generates the second control signal according to the wave signal and the output voltage.

Abstract translation: 功率转换器包括波发生器，低通滤波器，第一控制电路和第二控制电路。 波发生器接收输入电压，并根据第一控制信号和第二控制信号将输入信号转换成波信号。 低通滤波器对波形信号进行滤波以产生输出电压。 第一控制电路根据波信号和输出电压产生第一控制信号。 第二控制电路根据波信号和输出电压产生第二控制信号。