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公开(公告)号：US10396771B2
公开(公告)日：2019-08-27
申请号：US15921513
申请日：2018-03-14
Applicant: MediaTek Inc.
Inventor： Chih-Chen Li , Kuan-Yu Fang , Kuan-Yu Chu , Yen-Hsun Hsu
Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of generating a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of driver circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality of driver circuits are coupled to the plurality of inductors, respectively. The inductance values of at least two inductors among the plurality of inductors are greater than the inductance value of another inductor.
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公开(公告)号：US10211723B2
公开(公告)日：2019-02-19
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
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.
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公开(公告)号：US20180262097A1
公开(公告)日：2018-09-13
申请号：US15912396
申请日：2018-03-05
Applicant: MediaTek Inc.
Inventor： Kuan-Yu Chu , HuaChiang Huang , Chih-Chen Li , Shan-Fong Hong
IPC: H02M1/08
Abstract: An inverter circuit may include an inverter, a driver coupled to the inverter, and a slew rate control module configured to modify a slew rate of the driver. The slew rate may be modified based on a magnitude of a load driven by the inverter circuit. The magnitude of the load driven by the inverter circuit may be indicated by a current representing a load current or a voltage representing an input voltage. The slew rate may also be modified based on a mode configuration of the inverter circuit.
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Patent Agency Ranking
公开(公告)号：US20180205371A1
公开(公告)日：2018-07-19
申请号：US15921513
申请日：2018-03-14
Applicant: MediaTek Inc.
Inventor： Chih-Chen Li , Kuan-Yu Fang , Kuan-Yu Chu , Yen-Hsun Hsu
IPC: H03K17/00
CPC classification number: H03K17/005 , G06F1/30
Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of generating a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of driver circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality of driver circuits are coupled to the plurality of inductors, respectively. The inductance values of at least two inductors among the plurality of inductors are greater than the inductance value of another inductor.
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公开(公告)号：US10784763B2
公开(公告)日：2020-09-22
申请号：US15912396
申请日：2018-03-05
Applicant: MediaTek Inc.
Inventor： Kuan-Yu Chu , HuaChiang Huang , Chih-Chen Li , Shan-Fong Hong
Abstract: An inverter circuit may include an inverter, a driver coupled to the inverter, and a slew rate control module configured to modify a slew rate of the driver. The slew rate may be modified based on a magnitude of a load driven by the inverter circuit. The magnitude of the load driven by the inverter circuit may be indicated by a current representing a load current or a voltage representing an input voltage. The slew rate may also be modified based on a mode configuration of the inverter circuit.
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公开(公告)号：US10211732B2
公开(公告)日：2019-02-19
申请号：US15240362
申请日：2016-08-18
Applicant: MediaTek Inc.
Inventor： Chih-Chen Li , Kuan-Yu Chu , Shan-Fong Hong
Abstract: An SMPS (Switched Mode Power Supply) circuit includes a first switch element, a second switch element, an inductor, a capacitor, a current sensor, a current comparator, and a controller. The first switch element is coupled between a first power node and a switch node. The second switch element is coupled between the switch node and a second power node. The inductor is coupled between the switch node and an output node. The capacitor is coupled between the output node and the second power node. The current sensor detects a switch current through the second switch element. The current comparator compares the switch current with a first reference current to generate a comparison signal. The controller controls the first switch element and the second switch element according to the comparison signal and a switch voltage at the switch node. The invention can avoid an excessive SMPS output current.
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公开(公告)号：US10116211B2
公开(公告)日：2018-10-30
申请号：US14924910
申请日：2015-10-28
Applicant: MediaTek Inc.
Inventor： Yung Hsu Chen , Kuan-Yu Chu
Abstract: A power converter with adaptive zero-crossing current detection is provided. The power converter includes a first transistor, a second transistor, a PWM (Pulse Width Modulation) controller, a low-pass filter, and a delay controller. The first transistor is coupled between a supply voltage and a common node. The second transistor is coupled between the common node and a ground voltage. The common node has a reactive voltage. A reactive current flows through the common node. The PWM controller selectively enables and disables the first transistor and the second transistor according to a second control signal and a first transistor control signal. The low-pass filter is coupled between the common node and an output node. The delay controller generates the second control signal according to the reactive voltage.
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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
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.
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