Wanfeng Zhang

Person

Palo Alto, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Voltage sensing of an active clamp switching power converter circui...
- Patent number 11,239,740
- Issue date Feb 1, 2022
- HUAYUAN SEMICONDUCTOR (SHENZHEN) LIMITED COMPANY
- Wanfeng Zhang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Controlling an active clamp switching power converter circuit based...
- Patent number 11,050,350
- Issue date Jun 29, 2021
- HUAYUAN SEMICONDUCTOR (SHENZHEN) LIMITED COMPANY
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Pfm-pwm control for power regulators
- Patent number 9,954,444
- Issue date Apr 24, 2018
- Marvell International Ltd.
- Biing Long Shu
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Line voltage detection circuit
- Patent number 9,829,513
- Issue date Nov 28, 2017
- Marvell World Trade Ltd.
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Resonant converter with synchronous rectifier feedback
- Patent number 9,831,772
- Issue date Nov 28, 2017
- Marvell International Ltd.
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for controlling TRIAC dimmable device
- Patent number 9,729,079
- Issue date Aug 8, 2017
- Marvell International Ltd.
- Hao Peng
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for dimmable LED driver
- Patent number 9,699,853
- Issue date Jul 4, 2017
- Marvell World Trade Ltd.
- Wanfeng Zhang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Bleeder method using switch node coupling capacitor for TRIAC dimmi...
- Patent number 9,692,316
- Issue date Jun 27, 2017
- Marvell International Ltd.
- Young Chul Ryu
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Overshoot prevention for deep dimming startup
- Patent number 9,608,527
- Issue date Mar 28, 2017
- Marvell International Ltd.
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current shaping scheme in TRIAC dimmable LED driver
- Patent number 9,559,675
- Issue date Jan 31, 2017
- Marvell International Ltd.
- Hao Peng
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Systems and methods for estimating an output current of a power con...
- Patent number 9,552,005
- Issue date Jan 24, 2017
- Marvell World Trade Ltd.
- Wanfeng Zhang
- G05 - CONTROLLING REGULATING
Information Patent Grant
Current shaping for dimmable LED
- Patent number 9,521,715
- Issue date Dec 13, 2016
- Marvell World Trade Ltd.
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Dimmer circuit for electronic loads
- Patent number 9,497,807
- Issue date Nov 15, 2016
- Marvell World Trade Ltd.
- Radu Pitigoi-Aron
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Method and apparatus for eliminating shimmering
- Patent number 9,490,695
- Issue date Nov 8, 2016
- Marvell International Ltd.
- Sai Bun Wong
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for dimmable LED driver
- Patent number 9,485,816
- Issue date Nov 1, 2016
- Marvell World Trade Ltd.
- Wanfeng Zhang
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Current shaping for dimmable LED
- Patent number 9,480,112
- Issue date Oct 25, 2016
- Marvell World Trade Ltd.
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Buck regulator for LED lighting color mixing and/or current compens...
- Patent number 9,445,475
- Issue date Sep 13, 2016
- Marvell International Ltd.
- Sehat Sutardja
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Reduced noise power converter using novel shield
- Patent number 9,425,684
- Issue date Aug 23, 2016
- Marvell World Trade Ltd.
- Jinho Choi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and apparatus for controlling a power adjustment to a lighti...
- Patent number 9,392,654
- Issue date Jul 12, 2016
- Marvell World Trade Ltd.
- Hao Peng
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and apparatus for turning on a lighting device
- Patent number 9,356,534
- Issue date May 31, 2016
- Marvell International Ltd.
- Hao Peng
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Multi-string dimmable LED driver
- Patent number 9,320,097
- Issue date Apr 19, 2016
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Current limiting circuit and method for LED driver
- Patent number 9,306,387
- Issue date Apr 5, 2016
- Marvell World Trade Ltd.
- Sehat Sutardja
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and apparatus for selectively loading a dimmer circuit
- Patent number 9,247,621
- Issue date Jan 26, 2016
- Marvell International Ltd.
- Daniel Reed
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Circuits and methods for determining peak current
- Patent number 9,246,395
- Issue date Jan 26, 2016
- Marvell International Ltd.
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for controlling a lighting device
- Patent number 9,220,136
- Issue date Dec 22, 2015
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Soft bleeder to remove step dimming
- Patent number 9,220,138
- Issue date Dec 22, 2015
- Marvell International Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Alternating current (AC) line voltage determination
- Patent number 9,185,760
- Issue date Nov 10, 2015
- Marvell International Ltd.
- Jinho Choi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Regulator for LED lighting color mixing
- Patent number 9,185,755
- Issue date Nov 10, 2015
- Marvell World Trade Ltd.
- Sehat Sutardja
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Start-up voltage for solid-state lighting controller
- Patent number 9,179,523
- Issue date Nov 3, 2015
- Marvell International Ltd.
- Young Chul Ryu
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and apparatus for altering a color of a mixture of light pro...
- Patent number 9,148,921
- Issue date Sep 29, 2015
- Marvell Word Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
VOLTAGE SENSING OF AN ACTIVE CLAMP SWITCHING POWER CONVERTER CIRCUI...
- Publication number 20210296991
- Publication date Sep 23, 2021
- Huayuan Semiconductor (Shenzhen) Limited Company
- Wanfeng Zhang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
VOLTAGE SENSING OF AN ACTIVE CLAMP SWITCHING POWER CONVERTER CIRCUIT
- Publication number 20210296996
- Publication date Sep 23, 2021
- Huayuan Semiconductor (Shenzhen) Limited Company
- Jinho Choi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
METHOD AND APPARATUS FOR DIMMABLE LED DRIVER
- Publication number 20170048943
- Publication date Feb 16, 2017
- Marvell World Trade Ltd.
- Wanfeng ZHANG
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
CURRENT SHAPING FOR DIMMABLE LED
- Publication number 20150078047
- Publication date Mar 19, 2015
- Marvell World Trade Ltd.
- Sehat SUTARDJA
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
LINE VOLTAGE DETECTION CIRCUIT
- Publication number 20150077090
- Publication date Mar 19, 2015
- Marvell World Trade Ltd.
- Jinho Choi
- G01 - MEASURING TESTING
Information Patent Application
APPARATUSES FOR BLEEDING CURRENT FROM A TRANSFORMER OF A SOLID-STAT...
- Publication number 20150015158
- Publication date Jan 15, 2015
- Marvell World Trade Ltd.
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
CURRENT SHAPING FOR DIMMABLE LED
- Publication number 20140347894
- Publication date Nov 27, 2014
- Marvell World Trade Ltd.
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
MULTI-STRING DIMMABLE LED DRIVER
- Publication number 20140333216
- Publication date Nov 13, 2014
- Marvell World Trade Ltd.
- Wanfeng ZHANG
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD AND APPARATUS FOR DIMMABLE LED DRIVER
- Publication number 20140327372
- Publication date Nov 6, 2014
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
INTEGRATED POWER SUPPLY ARCHITECTURE FOR LIGHT EMITTING DIODE-BASED...
- Publication number 20140284635
- Publication date Sep 25, 2014
- Wanfeng Zhang
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SYSTEMS AND METHODS FOR ESTIMATING AN OUTPUT CURRENT OF A POWER CON...
- Publication number 20140285169
- Publication date Sep 25, 2014
- Wanfeng Zhang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
REDUCED NOISE POWER CONVERTER USING NOVEL SHIELD
- Publication number 20140239825
- Publication date Aug 28, 2014
- Marvell World Trade Ltd.
- Jinho CHOI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
CONTROL CIRCUIT AND METHOD FOR ESTIMATING AN OUTPUT CURRENT OF A TR...
- Publication number 20140226371
- Publication date Aug 14, 2014
- Marvell World Trade Ltd.
- Jinho CHOI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
METHOD AND APPARATUS FOR ALTERING A COLOR OF A MIXTURE OF LIGHT PRO...
- Publication number 20140217916
- Publication date Aug 7, 2014
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
TEMPERATURE FOLDBACK CIRCUIT FOR LED LOAD CONTROL BY CONSTANT CURRE...
- Publication number 20140111090
- Publication date Apr 24, 2014
- Marvell World Trade Ltd.
- Wanfeng ZHANG
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
CURRENT LIMITING CIRCUIT AND METHOD FOR LED DRIVER
- Publication number 20140091714
- Publication date Apr 3, 2014
- Marvell World Trade Ltd.
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING A LIGHTING DEVICE
- Publication number 20140063857
- Publication date Mar 6, 2014
- Hao Peng
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING A LIGHTING DEVICE
- Publication number 20130307434
- Publication date Nov 21, 2013
- Marvell World Trade Ltd.
- Wanfeng ZHANG
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
LED CONTROLLER WITH COMPENSATION FOR DIE-TO-DIE VARIATION AND TEMPE...
- Publication number 20130249419
- Publication date Sep 26, 2013
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD AND APPARATUS FOR CURRENT CONTROL WITH LED DRIVER
- Publication number 20130162156
- Publication date Jun 27, 2013
- Marvell World Trade Ltd.
- Pantas SUTARDJA
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
COLOR MIXING SYSTEM WITH BUCK-BOOST AND FLYBACK TOPOLOGIES
- Publication number 20130134905
- Publication date May 30, 2013
- Marvell International Ltd.
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
INTELLIGENT SWITCHING CONTROLLER AND POWER CONVERSION CIRCUITS AND...
- Publication number 20130113451
- Publication date May 9, 2013
- Marvell World Trade Ltd.
- Wanfeng Zhang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
REGULATOR FOR LED LIGHTING COLOR MIXING
- Publication number 20130057163
- Publication date Mar 7, 2013
- Sehat Sutardja
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD AND APPARATUS FOR LED LIGHTING
- Publication number 20130049626
- Publication date Feb 28, 2013
- Wanfeng ZHANG
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
CORRELATED COLOR TEMPERATURE CONTROL METHODS AND DEVICES
- Publication number 20130020956
- Publication date Jan 24, 2013
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
TRIAC DIMMING SYSTEMS FOR SOLID-STATE LOADS
- Publication number 20120319621
- Publication date Dec 20, 2012
- Sehat Sutardja
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Two-Peak Current Control for Flyback Voltage Converters
- Publication number 20120230065
- Publication date Sep 13, 2012
- Jinho Choi
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
TRIAC Dimmer Detection
- Publication number 20120212258
- Publication date Aug 23, 2012
- Jinho Choi
- G01 - MEASURING TESTING
Information Patent Application
REDUCING VOLTAGE STRESS IN A FLYBACK CONVERTER DESIGN
- Publication number 20120163040
- Publication date Jun 28, 2012
- Hong Liang Zhang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Dimming Control for Electronic Lamp
- Publication number 20120091910
- Publication date Apr 19, 2012
- Wanfeng Zhang
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Wanfeng Zhang

Person

Patents Grantslast 30 patents

Voltage sensing of an active clamp switching power converter circui...

Controlling an active clamp switching power converter circuit based...

Pfm-pwm control for power regulators

Line voltage detection circuit

Resonant converter with synchronous rectifier feedback

Method and apparatus for controlling TRIAC dimmable device

Method and apparatus for dimmable LED driver

Bleeder method using switch node coupling capacitor for TRIAC dimmi...

Overshoot prevention for deep dimming startup

Current shaping scheme in TRIAC dimmable LED driver

Systems and methods for estimating an output current of a power con...

Current shaping for dimmable LED

Dimmer circuit for electronic loads

Method and apparatus for eliminating shimmering

Method and apparatus for dimmable LED driver

Current shaping for dimmable LED

Buck regulator for LED lighting color mixing and/or current compens...

Reduced noise power converter using novel shield

Method and apparatus for controlling a power adjustment to a lighti...

Method and apparatus for turning on a lighting device

Multi-string dimmable LED driver

Current limiting circuit and method for LED driver

Method and apparatus for selectively loading a dimmer circuit

Circuits and methods for determining peak current

Method and apparatus for controlling a lighting device

Soft bleeder to remove step dimming

Alternating current (AC) line voltage determination

Regulator for LED lighting color mixing

Start-up voltage for solid-state lighting controller

Method and apparatus for altering a color of a mixture of light pro...

Patents Applicationslast 30 patents

VOLTAGE SENSING OF AN ACTIVE CLAMP SWITCHING POWER CONVERTER CIRCUI...

VOLTAGE SENSING OF AN ACTIVE CLAMP SWITCHING POWER CONVERTER CIRCUIT

METHOD AND APPARATUS FOR DIMMABLE LED DRIVER

CURRENT SHAPING FOR DIMMABLE LED

LINE VOLTAGE DETECTION CIRCUIT

APPARATUSES FOR BLEEDING CURRENT FROM A TRANSFORMER OF A SOLID-STAT...

CURRENT SHAPING FOR DIMMABLE LED

MULTI-STRING DIMMABLE LED DRIVER

METHOD AND APPARATUS FOR DIMMABLE LED DRIVER

INTEGRATED POWER SUPPLY ARCHITECTURE FOR LIGHT EMITTING DIODE-BASED...

SYSTEMS AND METHODS FOR ESTIMATING AN OUTPUT CURRENT OF A POWER CON...

REDUCED NOISE POWER CONVERTER USING NOVEL SHIELD

CONTROL CIRCUIT AND METHOD FOR ESTIMATING AN OUTPUT CURRENT OF A TR...

METHOD AND APPARATUS FOR ALTERING A COLOR OF A MIXTURE OF LIGHT PRO...

TEMPERATURE FOLDBACK CIRCUIT FOR LED LOAD CONTROL BY CONSTANT CURRE...

CURRENT LIMITING CIRCUIT AND METHOD FOR LED DRIVER

METHOD AND APPARATUS FOR CONTROLLING A LIGHTING DEVICE

METHOD AND APPARATUS FOR CONTROLLING A LIGHTING DEVICE

LED CONTROLLER WITH COMPENSATION FOR DIE-TO-DIE VARIATION AND TEMPE...

METHOD AND APPARATUS FOR CURRENT CONTROL WITH LED DRIVER

COLOR MIXING SYSTEM WITH BUCK-BOOST AND FLYBACK TOPOLOGIES

INTELLIGENT SWITCHING CONTROLLER AND POWER CONVERSION CIRCUITS AND...

REGULATOR FOR LED LIGHTING COLOR MIXING

METHOD AND APPARATUS FOR LED LIGHTING

CORRELATED COLOR TEMPERATURE CONTROL METHODS AND DEVICES

TRIAC DIMMING SYSTEMS FOR SOLID-STATE LOADS

Two-Peak Current Control for Flyback Voltage Converters

TRIAC Dimmer Detection

REDUCING VOLTAGE STRESS IN A FLYBACK CONVERTER DESIGN

Dimming Control for Electronic Lamp