TW200641746A - LED current bias control using a step down regulator - Google Patents

LED current bias control using a step down regulator

Info

Publication number
TW200641746A
TW200641746A TW095114184A TW95114184A TW200641746A TW 200641746 A TW200641746 A TW 200641746A TW 095114184 A TW095114184 A TW 095114184A TW 95114184 A TW95114184 A TW 95114184A TW 200641746 A TW200641746 A TW 200641746A
Authority
TW
Taiwan
Prior art keywords
xcm
conduction mode
step down
control circuit
inductor current
Prior art date
Application number
TW095114184A
Other languages
English (en)
Inventor
Anthony G Russell
Chris B Bartholomeusz
Original Assignee
Catalyst Semiconductor Inc
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 Catalyst Semiconductor Inc filed Critical Catalyst Semiconductor Inc
Publication of TW200641746A publication Critical patent/TW200641746A/zh

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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/613—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in parallel with the load as final control devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Dc-Dc Converters (AREA)
TW095114184A 2005-04-25 2006-04-20 LED current bias control using a step down regulator TW200641746A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/114,516 US7323828B2 (en) 2005-04-25 2005-04-25 LED current bias control using a step down regulator

Publications (1)

Publication Number Publication Date
TW200641746A true TW200641746A (en) 2006-12-01

Family

ID=37186183

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095114184A TW200641746A (en) 2005-04-25 2006-04-20 LED current bias control using a step down regulator

Country Status (5)

Country Link
US (1) US7323828B2 (zh)
JP (1) JP2008539565A (zh)
KR (1) KR20080009110A (zh)
TW (1) TW200641746A (zh)
WO (1) WO2006116576A2 (zh)

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CN103533704A (zh) * 2012-07-05 2014-01-22 松下电器产业株式会社 Led点亮装置及使用该装置的照明设备
US8836233B2 (en) 2011-11-15 2014-09-16 Industrial Technology Research Institute Light source apparatus and driving apparatus thereof

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JP4600583B2 (ja) 2008-09-10 2010-12-15 東芝ライテック株式会社 調光機能を有する電源装置及び照明器具
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US8508150B2 (en) * 2008-12-12 2013-08-13 O2Micro, Inc. Controllers, systems and methods for controlling dimming of light sources
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KR100916851B1 (ko) * 2009-04-06 2009-09-21 주식회사 케이투엘 정전력형 ｌｅｄ 점등회로
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JP5515931B2 (ja) * 2009-04-24 2014-06-11 東芝ライテック株式会社 発光装置及び照明装置
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JP5333769B2 (ja) * 2009-09-04 2013-11-06 東芝ライテック株式会社 Ｌｅｄ点灯装置および照明装置
JP5333768B2 (ja) 2009-09-04 2013-11-06 東芝ライテック株式会社 Ｌｅｄ点灯装置および照明装置
JP5641180B2 (ja) 2009-09-18 2014-12-17 東芝ライテック株式会社 Ｌｅｄ点灯装置および照明装置
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WO2012056501A1 (ja) * 2010-10-29 2012-05-03 パナソニック株式会社 降圧チョッパ装置
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JP5947082B2 (ja) * 2011-04-14 2016-07-06 オーツー マイクロ， インコーポレーテッド 光源を駆動するための回路と方法
KR101251394B1 (ko) * 2011-06-01 2013-04-05 주식회사 아모럭스 Ｌｅｄ 조명 고장 검출 장치 및 그 방법
CN102905416B (zh) * 2011-10-17 2014-02-12 凹凸电子（武汉）有限公司 光源驱动电路及驱动方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8836233B2 (en) 2011-11-15 2014-09-16 Industrial Technology Research Institute Light source apparatus and driving apparatus thereof
CN103533704A (zh) * 2012-07-05 2014-01-22 松下电器产业株式会社 Led点亮装置及使用该装置的照明设备
CN103533704B (zh) * 2012-07-05 2015-07-29 松下电器产业株式会社 Led点亮装置及使用该装置的照明设备

Also Published As

Publication number Publication date
WO2006116576A2 (en) 2006-11-02
WO2006116576A3 (en) 2007-05-18
US20060238174A1 (en) 2006-10-26
US7323828B2 (en) 2008-01-29
JP2008539565A (ja) 2008-11-13
KR20080009110A (ko) 2008-01-24

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