WO2012167411A1 - Circuit de gradation pour lampe à del de grande puissance - Google Patents

Circuit de gradation pour lampe à del de grande puissance Download PDF

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Publication number
WO2012167411A1
WO2012167411A1 PCT/CN2011/001619 CN2011001619W WO2012167411A1 WO 2012167411 A1 WO2012167411 A1 WO 2012167411A1 CN 2011001619 W CN2011001619 W CN 2011001619W WO 2012167411 A1 WO2012167411 A1 WO 2012167411A1
Authority
WO
WIPO (PCT)
Prior art keywords
constant current
led
triode
led lamp
feedback resistor
Prior art date
Application number
PCT/CN2011/001619
Other languages
English (en)
Chinese (zh)
Inventor
董建国
俞剑锋
林万炯
Original Assignee
宁波赛尔富电子有限公司
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 宁波赛尔富电子有限公司 filed Critical 宁波赛尔富电子有限公司
Publication of WO2012167411A1 publication Critical patent/WO2012167411A1/fr

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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
    • 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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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]

Definitions

  • the invention relates to a high power LED lamp dimming circuit. Background technique
  • the current LED driver power supply has a constant voltage type driving power supply (such as 12V or 24V output voltage). This type of power supply can be used in constant voltage LED lamps, generally low power LED lamps. It is possible to use a resistor for current limiting; there is also a constant current type LED driving power supply, which is generally used to drive constant current type high power LED lamps. For constant voltage LED luminaires, pulse modulation (PWM) dimming technology can be used directly.
  • PWM pulse modulation
  • the technical problem to be solved by the present invention is to provide a high-power LED lamp dimming circuit for the above prior art, which can solve the dimming problem of high-power LED lamps and solve the problems of reliability and electromagnetic compatibility.
  • the high-power LED lamp dimming circuit is configured to perform pulse modulation dimming on the LED lighting circuit
  • the LED lighting circuit comprises a plurality of serially connected LED lamps, a triode and a feedback resistor, wherein an anode of the first LED lamp of the plurality of serially connected LED lamps is connected to an anode of an external constant current power source, and a cathode of the last LED lamp of the plurality of serially connected LED lamps and a collector of the triode Connected, the emitter of the triode is connected to the first end of the feedback resistor, and the second end of the feedback resistor is connected to the negative pole of the external constant current source, wherein the LED dimming circuit comprises a constant current controller and a linear adjustment tube.
  • the base of the linear adjustment tube is connected to the external pulse width modulation signal output end, and the collector of the linear adjustment tube is connected to the output pin of the constant current controller, and the base of the triode is also connected with the output pin of the constant current controller. Connected, the first end of the feedback resistor and the constant current confirmation The feedback input pin of the controller is connected.
  • the invention has the advantages that: by adding a constant current controller and a linear adjusting tube in the circuit, the output end of the constant current controller is used as a feedback reference source for adjusting the V of the triode in the LED lighting circuit.
  • the CE voltage ensures that the voltage across the feedback resistor is constant, ensuring that the current flowing through the LED's LED does not exceed the output of the constant current controller divided by the feedback resistor.
  • the pulse modulation signal is applied to the linear adjustment tube, and the dimming function of the LED light emitting diode can be completed; the solution can solve the shortcoming that the constant current driving power source cannot perform PWM dimming.
  • FIG. 1 is a circuit diagram of a high power LED lamp dimming circuit in an embodiment of the present invention. detailed description
  • the high-power LED lamp dimming circuit includes a constant current controller N1 of type AL8400 and a linear adjustment tube Q2, a resistor R1, a base of the linear adjustment tube Q2 and an external pulse width modulation signal output end.
  • the PWM is connected, and the collector of the linear adjustment tube Q2 is connected to the output pin of the constant current controller N1;
  • the LED lighting circuit comprises a plurality of LED lamps connected in series, a transistor Q1 and a feedback resistor R2, and the plurality of LEDs connected in series
  • the anode of the first LED lamp D1 in the lamp is connected to the positive pole of the external constant current power source, and the cathode of the last LED lamp Dn among the plurality of serially connected LED lamps is connected to the collector of the transistor Q1, and the emitter of the transistor Q1 is
  • the first end of the feedback resistor R2 is connected, and the second end of the feedback resistor R2 is connected to the negative terminal of the external constant current power supply; the base of the transistor Q1 is also connected
  • the VCE voltage of the transistor Q1 with the output of the AL8400 is always 0.2V, thus ensuring the flow.
  • the current of the LED lamp does not exceed 0.2V/R2 at the maximum.
  • the PWM signal is applied to the linear adjustment tube Q2, and the dimming function of the LED lamp Dl-Dn can be completed.

Landscapes

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

Abstract

La présente invention concerne un circuit de gradation pour lampe à DEL de grande puissance, utilisé pour la graduation et la modulation de l'impulsion d'un circuit d'éclairage à DEL. Le circuit d'éclairage à DEL comprend de nombreuses lampes à DEL en série, une triode et une résistance de rétroaction. L'anode de la première lampe à DEL des lampes à DEL en série est connectée à l'électrode positive du courant constant externe. La cathode de la dernière lampe à DEL est connectée au collecteur de la triode. L'émetteur de la triode est connecté à la première extrémité de la résistance de rétroaction. La seconde extrémité de la résistance de rétroaction est connectée à l'électrode négative du courant constant externe. Le circuit présente un tube de réglage linéaire dont la base est connectée à une extrémité de sortie de signal de modulation de largeur d'impulsion connectée à l'extérieur. Le collecteur du tube de réglage linéaire est connecté à une broche de sortie du dispositif de commande de courant constant. La base de la triode est connectée à la broche de sortie du dispositif de commande de courant constant. La seconde extrémité de la résistance de rétroaction est connectée à la broche d'entrée de rétroaction du dispositif de commande de courant constant. En comparaison de l'état de la technique, une modulation de largeur d'impulsion (MLI) peut être mise en œuvre dans l'alimentation en énergie motrice à courant constant.
PCT/CN2011/001619 2011-06-10 2011-09-26 Circuit de gradation pour lampe à del de grande puissance WO2012167411A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011101579446A CN102170735A (zh) 2011-06-10 2011-06-10 一种大功率led灯调光电路
CN201110157944.6 2011-06-10

Publications (1)

Publication Number Publication Date
WO2012167411A1 true WO2012167411A1 (fr) 2012-12-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/001619 WO2012167411A1 (fr) 2011-06-10 2011-09-26 Circuit de gradation pour lampe à del de grande puissance

Country Status (2)

Country Link
CN (1) CN102170735A (fr)
WO (1) WO2012167411A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111629476A (zh) * 2020-07-28 2020-09-04 广东奥马冰箱有限公司 一种制冷器具led灯控制电路

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102170735A (zh) * 2011-06-10 2011-08-31 林万炯 一种大功率led灯调光电路
CN103945610A (zh) * 2014-04-21 2014-07-23 王开 高速脉动恒流led驱动电源电路
CN109618471A (zh) * 2019-01-28 2019-04-12 顺德职业技术学院 一种调光系统及其控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070007907A1 (en) * 2005-07-11 2007-01-11 Varon Lighting, Inc. Auxiliary quartz lamp lighting system for electronic high intensity discharge lamp ballasts
CN102170735A (zh) * 2011-06-10 2011-08-31 林万炯 一种大功率led灯调光电路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101742771B (zh) * 2009-12-22 2013-09-11 海洋王照明科技股份有限公司 一种便携式灯具及其调光电路和调光方法
CN201688251U (zh) * 2010-03-22 2010-12-29 成都爱益迪电子科技有限公司 高效率低谐波led照明自动调光电源
CN202103910U (zh) * 2011-06-10 2012-01-04 林万炯 一种大功率led灯调光电路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070007907A1 (en) * 2005-07-11 2007-01-11 Varon Lighting, Inc. Auxiliary quartz lamp lighting system for electronic high intensity discharge lamp ballasts
CN102170735A (zh) * 2011-06-10 2011-08-31 林万炯 一种大功率led灯调光电路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"0.2v LINEAR LED DRIVER CONTROLLER TARGET SPECIFICATION, DS35115 Rev. 1-2", DIODES INCORPORATED, December 2010 (2010-12-01), pages 1 - 12 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111629476A (zh) * 2020-07-28 2020-09-04 广东奥马冰箱有限公司 一种制冷器具led灯控制电路

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