公开(公告)号：US09859792B2

公开(公告)日：2018-01-02

申请号：US15429178

申请日：2017-02-10

Applicant: Silicon Motion Inc.

Inventor： Tsun-Hsin Wang

IPC: H02M3/07 ,  H02M1/00 ,  G05F1/565

CPC classification number: H02M3/07 ,  G05F1/565 ,  H02M3/073 ,  H02M2001/0045 ,  H02M2003/072

Abstract: A switching-capacitor regulator with a charge injection mode for a high loading current is used to generate an output voltage at an output node, where the switching-capacitor regulator includes a storage capacitor, a switch module, a current source and a control unit. The switch module is coupled between the storage capacitor, a first supply voltage, a second supply voltage and the output node. The current source is coupled to the output node, and is used for selectively providing a current to the output node. The control unit is coupled to the switch module and the output node, and is used for controlling the switch module to selectively charge or discharge the storage capacitor, and for controlling the current source to selectively provide the current to the output node, to adjust a voltage level of the output voltage

公开(公告)号：US20170359872A1

公开(公告)日：2017-12-14

申请号：US15688082

申请日：2017-08-28

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： ERIK J. MENTZE ,  KARL THOMPSON

IPC: H05B33/08 ,  H02M1/36 ,  H05B37/00 ,  H02M1/00

CPC classification number: H05B33/0815 ,  H02M1/36 ,  H02M2001/0045 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/0887 ,  H05B37/00

Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.

公开(公告)号：US20170353102A1

公开(公告)日：2017-12-07

申请号：US15489479

申请日：2017-04-17

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chien-Yang Chen ,  Ta-Yung Yang ,  Yu-Wen Chang

IPC: H02M1/15 ,  H02M1/32 ,  H02M7/06 ,  H05B33/08

CPC classification number: H02M1/15 ,  H02M1/32 ,  H02M3/156 ,  H02M7/06 ,  H02M2001/0045 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/089

Abstract: The present invention discloses a switching regulator capable of reducing current ripple and a control circuit thereof. The switching regulator includes a buck power stage circuit and a control circuit. The control circuit includes an operation signal generation circuit and a current source circuit for reducing current ripple. The current source circuit is coupled to the operation signal generation circuit and the buck power stage circuit, for operating a ripple reduction switch therein according to an operation signal, to convert the output voltage to a load voltage between a load node and a reference node, and to reduce a current ripple of the output current, so as to generate a load current which is supplied to a load circuit, wherein the load circuit is coupled between the load node and the reference node, and the current source circuit is coupled between the output node and the load node.

公开(公告)号：US20170346484A1

公开(公告)日：2017-11-30

申请号：US15590826

申请日：2017-05-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAIKI NISHIMOTO ,  ATSUSHI YAMAMOTO ,  SHOICHI HARA

IPC: H03K17/567 ,  H02M3/158 ,  H02M3/335 ,  H03K17/0412 ,  H02M1/00

CPC classification number: H03K17/567 ,  H02M1/08 ,  H02M3/1584 ,  H02M3/33584 ,  H02M7/5387 ,  H02M2001/0003 ,  H02M2001/0045 ,  H03K17/0412 ,  H03K17/063 ,  H03K2217/0009 ,  H03K2217/0045

Abstract: An electric power conversion circuit includes: first through fourth port terminals; a first diode having an anode connected to the first port terminal; a second diode having a cathode connected to the second port terminal; a third diode having a cathode connected to the first port terminal; a fourth diode having an anode connected to the second port terminal; first through fourth switches that are bridge-connected between a cathode of the first diode and an anode of the second diode; fifth through eighth switches that are bridge-connected between an anode of the third diode and a cathode of the fourth diode; a first bootstrap circuit that is connected to control terminals of the first through fourth switches; and a second bootstrap circuit that is connected to control terminals of the fifth through eighth switches.

公开(公告)号：US20170331299A1

公开(公告)日：2017-11-16

申请号：US15665074

申请日：2017-07-31

Applicant: uBeam Inc.

Inventor： Hong Gao ,  Jonathan Bolus

IPC: H02J5/00

CPC classification number: H02J5/00 ,  H02J1/00 ,  H02J1/102 ,  H02J1/108 ,  H02J1/12 ,  H02J7/345 ,  H02J50/15 ,  H02J2001/002 ,  H02J2001/008 ,  H02M1/32 ,  H02M7/2176 ,  H02M2001/0045 ,  H02M2001/008

Abstract: Systems and techniques are provided for a power receiver circuit. A power generating mechanism may include power generating elements that may generate alternating current signals. Rectifier circuit may include rectifiers that may generate a direct current signal from an alternating current signal, and diodes. Group circuits that may connect groups of rectifier circuits in electrical circuits to combine the direct current signals from the rectifier circuits in a group into a single direct current signal. A step down converter may be connected to the group circuits. The step down converter may convert a direct current signal to a direct current signal of a target voltage level. An output switch may be connected to the step down converter. A linear regulator may be connected to the step down converter. A microcontroller may be connected to the linear regulator and the output switch and may control the output switch.

公开(公告)号：US20170302263A1

公开(公告)日：2017-10-19

申请号：US15132490

申请日：2016-04-19

Applicant: Ford Global Technologies, LLC

Inventor： Zhuxian Xu ,  Chingchi Chen ,  Xi Lu ,  Ke Zou

IPC: H03K17/10 ,  B60L11/18 ,  H02M3/158 ,  H03K17/284

CPC classification number: H03K17/107 ,  B60L11/1816 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0045 ,  H02P27/06 ,  H03K17/042 ,  H03K17/166 ,  H03K17/168 ,  H03K17/284 ,  Y02T10/7258

Abstract: A vehicle powertrain includes an IGBT and a gate driver. The IGBT is configured to energize an electric machine. The gate driver is configured to apply an off voltage less than a threshold voltage onto a gate of the IGBT while the IGBT is operating in a saturation mode, and in response to expiration of a delay from a transition from saturation to linear mode, apply a voltage pulse above the off voltage to reduce flyback from the electric machine. The gate driver may be configured to, in response to expiration of a delay from a transition from saturation to linear mode, apply a voltage pulse above the off voltage and below the threshold to reduce flyback from the electric machine.

公开(公告)号：US09785222B2

公开(公告)日：2017-10-10

申请号：US14579899

申请日：2014-12-22

Applicant: QUALCOMM Incorporated

Inventor： James Thomas Doyle ,  Zhengming Fu ,  Farsheed Mahmoudi ,  Amirali Shayan Arani ,  Nazanin Darbanian

IPC: H02M3/156 ,  G06F1/32 ,  G05F1/575 ,  H02M1/00

CPC classification number: G06F1/3287 ,  G05F1/575 ,  G06F1/3296 ,  H02M2001/0045 ,  H02M2003/1566

Abstract: Operational mode changes in a system-on-a-chip (SoC) integrated circuit in a complex device such as a mobile phone cause spikes in current demand which can cause voltage droops that disrupt operation of the SoC. A hybrid parallel power supply connects a switching-mode power supply and a low-dropout voltage regulator in parallel to provide high efficiency and fast response times. Integration of the voltage regulator on the SoC reduces parasitic impedance be between the voltage regulator and the load to aid in reducing voltage droops. The switching-mode power supply and the low-dropout voltage regulator can regulate their outputs to slightly difference voltage levels. This can allow the switching-mode power supply to supply most of the SoC's current demands.

公开(公告)号：US09780654B2

公开(公告)日：2017-10-03

申请号：US14657545

申请日：2015-03-13

Applicant: MICRON TECHNOLOGY, INC.

Inventor： Feng Pan

IPC: H02M3/158 ,  G11C5/14 ,  G11C16/30 ,  H02M1/00

CPC classification number: H02M3/158 ,  G11C5/147 ,  G11C16/30 ,  H02M2001/0045

Abstract: A device includes a digital switch regulator to supply an output voltage and a first current to a load based on a reference voltage. The device also includes an analog circuit to supply a second current to the load in addition to the first current based on a duty cycle of the digital switch regulator.

公开(公告)号：US20170271972A1

公开(公告)日：2017-09-21

申请号：US15072059

申请日：2016-03-16

Applicant: Analog Devices, Inc.

Inventor： Jun Zhao ,  Brandon Day

IPC: H02M1/088

CPC classification number: H02M1/088 ,  G05F1/56 ,  G05F1/563 ,  H02M3/155 ,  H02M2001/0045 ,  H03F1/0261

Abstract: Apparatus and methods for a bias supply circuit to support power supply including a switched-mode voltage converter cascaded with an n-channel-based linear regulator are provided. In an example, a cascaded power supply system can include a switched-mode DC-to-DC power converter, including an input voltage node, a first stage output voltage node, and a bootstrapped floating bias voltage node, and a linear regulator circuit. The linear regulator circuit can include an n-channel field-effect transistor (NFET) pass transistor, including a drain terminal coupled to the first stage output voltage node, a gate terminal, and a source terminal configured to provide a second-stage output voltage, and a gate driver circuit, including a driver output coupled to the gate terminal of the NFET pass transistor, and a high side supply node configured to receive a bias voltage generated from the bootstrapped floating bias voltage node.

公开(公告)号：US09762132B2

公开(公告)日：2017-09-12

申请号：US14925863

申请日：2015-10-28

Applicant: Advanced Charging Technologies, LLC

Inventor： Michael H. Freeman ,  W. J. “Jim” Weaver, Jr. ,  Mitchael C. Freeman ,  Robert Dieter ,  Andrea Baschirotto ,  Piero Malcovati ,  Marco Grassi ,  Glenn Noufer ,  Randall L. Sandusky ,  Neaz Farooqi ,  Jim Devoy ,  Silvia Jaeckel ,  Madison Hayes Yarbro Freeman

IPC: H02M3/335 ,  G05F1/46 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M3/07 ,  H02M3/156 ,  H02M7/06 ,  H02M1/00

CPC classification number: H02M3/33546 ,  G05F1/462 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M3/07 ,  H02M3/073 ,  H02M3/156 ,  H02M3/33515 ,  H02M3/33553 ,  H02M7/06 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0032 ,  H02M2001/0045 ,  H02M2001/007 ,  H02M2003/072 ,  H02M2003/075 ,  H03M7/10 ,  Y02B70/16

Abstract: An electrical circuit for providing electrical power for use in powering electronic devices, such as monitors, televisions, white goods, data centers, and telecom circuit boards, is described herein. The electrical circuit includes an input terminal configured to receive an input power signal, an output terminal configured to provide an output power signal, and a forward converter coupled to the input and output terminals. The forward converter includes a transformer, and a primary side regulation circuit coupled to a primary side of the transformer. The primary side regulation circuit includes a switching device coupled to the primary side, a current sense circuit configured to sense a current level on the primary side, and a controller configured to generate a pulse-width modulated control signal delivered to the switching device as a function of the sensed current level to regulate the transformer to deliver the output power signal at a desired voltage level.