WO2012138200A3 - Led driver for improving power factor - Google Patents

Led driver for improving power factor Download PDF

Info

Publication number
WO2012138200A3
WO2012138200A3 PCT/KR2012/002672 KR2012002672W WO2012138200A3 WO 2012138200 A3 WO2012138200 A3 WO 2012138200A3 KR 2012002672 W KR2012002672 W KR 2012002672W WO 2012138200 A3 WO2012138200 A3 WO 2012138200A3
Authority
WO
WIPO (PCT)
Prior art keywords
led
inductor
input voltage
power factor
led driver
Prior art date
Application number
PCT/KR2012/002672
Other languages
French (fr)
Korean (ko)
Other versions
WO2012138200A9 (en
WO2012138200A2 (en
Inventor
김재하
강은철
Original Assignee
주식회사 엠알씨랩
서울대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 엠알씨랩, 서울대학교산학협력단 filed Critical 주식회사 엠알씨랩
Publication of WO2012138200A2 publication Critical patent/WO2012138200A2/en
Publication of WO2012138200A3 publication Critical patent/WO2012138200A3/en
Publication of WO2012138200A9 publication Critical patent/WO2012138200A9/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The LED driver comprises: a power supply portion for supplying an input voltage; an inductor for receiving the input voltage and charging energy from the input voltage, wherein the energy drives at least one LED; a control portion for outputting a control signal based on the input voltage and an inductor current which flows in the inductor; and a switch, which is switched according to the control signal, for supplying the charged energy to the LEDs. When compared to existing boost converter-type LED drivers, the present invention allows direct control on an input current, rather than controlling an output voltage, by eliminating a capacitor element, which is connected in parallel to an output end of the LED, and a rectifier diode which is serially connected between the inductor and one end of the LED, thereby improving the power factor.
PCT/KR2012/002672 2011-04-08 2012-04-09 Led driver for improving power factor WO2012138200A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0032885 2011-04-08
KR1020110032885A KR20120114998A (en) 2011-04-08 2011-04-08 Led driver for improving power factor

Publications (3)

Publication Number Publication Date
WO2012138200A2 WO2012138200A2 (en) 2012-10-11
WO2012138200A3 true WO2012138200A3 (en) 2012-12-06
WO2012138200A9 WO2012138200A9 (en) 2013-01-24

Family

ID=46969723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/002672 WO2012138200A2 (en) 2011-04-08 2012-04-09 Led driver for improving power factor

Country Status (2)

Country Link
KR (1) KR20120114998A (en)
WO (1) WO2012138200A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9131567B2 (en) 2012-10-22 2015-09-08 Marvell World Trade Ltd. Temperature foldback circuit for LED load control by constant current source
CN104333934B (en) * 2013-07-22 2016-12-28 四川新力光源股份有限公司 LED illumination drive circuit
US9641063B2 (en) 2014-01-27 2017-05-02 General Electric Company System and method of compensating power factor for electrical loads
KR102277126B1 (en) 2014-06-24 2021-07-15 삼성전자주식회사 DRIVING DEVICE FOR LEDs AND LIGHTING DEVICE
WO2016016034A1 (en) * 2014-08-01 2016-02-04 Koninklijke Philips N.V. Circuit for driving a load

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238657A (en) * 2005-02-28 2006-09-07 Mitsumi Electric Co Ltd Power supply unit
KR20090056567A (en) * 2007-11-30 2009-06-03 삼성전기주식회사 Light emitting diode driver controlling brightness with input power
KR20100084256A (en) * 2009-01-16 2010-07-26 서울반도체 주식회사 Driving apparatus of light emitting diode and driving method thereby
KR20100128923A (en) * 2009-05-29 2010-12-08 한양대학교 산학협력단 Light emitting device with controllable color temperature

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006238657A (en) * 2005-02-28 2006-09-07 Mitsumi Electric Co Ltd Power supply unit
KR20090056567A (en) * 2007-11-30 2009-06-03 삼성전기주식회사 Light emitting diode driver controlling brightness with input power
KR20100084256A (en) * 2009-01-16 2010-07-26 서울반도체 주식회사 Driving apparatus of light emitting diode and driving method thereby
KR20100128923A (en) * 2009-05-29 2010-12-08 한양대학교 산학협력단 Light emitting device with controllable color temperature

Also Published As

Publication number Publication date
KR20120114998A (en) 2012-10-17
WO2012138200A9 (en) 2013-01-24
WO2012138200A2 (en) 2012-10-11

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