WO2015050349A1 - Circuit de commande de del à courant alternatif capable de fournir une alimentation stable - Google Patents

Circuit de commande de del à courant alternatif capable de fournir une alimentation stable Download PDF

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Publication number
WO2015050349A1
WO2015050349A1 PCT/KR2014/009148 KR2014009148W WO2015050349A1 WO 2015050349 A1 WO2015050349 A1 WO 2015050349A1 KR 2014009148 W KR2014009148 W KR 2014009148W WO 2015050349 A1 WO2015050349 A1 WO 2015050349A1
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WO
WIPO (PCT)
Prior art keywords
led
power
unit
power supply
dimmer
Prior art date
Application number
PCT/KR2014/009148
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English (en)
Korean (ko)
Inventor
권옥환
신소봉
Original Assignee
메를로랩 주식회사
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 메를로랩 주식회사 filed Critical 메를로랩 주식회사
Publication of WO2015050349A1 publication Critical patent/WO2015050349A1/fr

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    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices

Definitions

  • the present invention relates to an alternating current LED driving circuit, and in particular, the circuit configuration for driving the dimmer and the circuit configuration for generating the internal power source share a key element, and the dimmer driving and the internal power generation through the integrated circuit having a relatively small size.
  • the present invention relates to an alternating current LED driving circuit capable of supplying a stable power supply to enable the implementation of an electronic circuit.
  • AC LED driving circuit proposed to drive LED under AC power has advantages of simple manufacturing process, low defect rate and long life compared with Switched mode power supply (SMPS) method.
  • SMPS Switched mode power supply
  • FIG. 1 is a view showing a conventional general AC LED driving circuit, the AC LED driving circuit is a basic principle that sequentially controls the current source (10).
  • the current source 20 for hold current in FIG. 2 should basically have a similar level of performance and function as a circuit driving the LED channel, the current source 10 constituting the LED channel.
  • the current source 10 constituting the LED channel.
  • ILEDn1 to ILEDn it is common to use ultra-high-voltage transistor of several hundred volts (V) class.
  • the power supply unit of the AC LED driving circuit may be designed in various ways according to the performance level required by the corresponding AC LED driving circuit.
  • the analog precision voltage circuit is usually designed using a low voltage transistor, whereas the power supply of the AC LED driving circuit is a power supply of 90 to 270 Vac.
  • the present invention has been proposed to solve the above problems, and the circuit configuration for driving the dimmer and the circuit configuration for generating the internal power supply share a key element, and the dimmer driving and It is an object of the present invention to provide an AC LED driving circuit capable of supplying a stable power that enables the implementation of an internal power generation circuit.
  • the AC LED driving circuit capable of supplying stable power includes a power supply unit to which external power is supplied and a first LED unit located at a shortest distance from a connection point with the power supply unit.
  • An LED lighting unit including an n-th LED unit located at the longest distance from the power supply unit, and individually connected to the output terminal of one or more LEDs forming the first to n-th LED unit to supply current to the corresponding LED or LED unit And a plurality of LED switching circuits forming a channel, and an internal power generation unit connected in parallel on a connection line between the power supply unit and the LED lighting unit to generate internal power for the operation of the LED lighting unit.
  • the power supply unit may further include a dimmer
  • the internal power generation unit includes a power transistor having an input terminal connected in parallel to a connection line between the power supply unit and the LED lighting unit, and a hold current for driving the dimmer connected to an output terminal of the power transistor.
  • a hold current source for on / off, a diode connected in parallel with the hold current source at an output terminal of the power transistor, a capacitor connected with an output terminal of the diode, and a parallel connection with the capacitor at an output terminal of the diode
  • a voltage regulator for example, a voltage regulator, and the internal power generation unit includes a power transistor having an input terminal connected in parallel to a connection line between the power supply unit and the LED lighting unit, and a hold current for driving the dimmer connected to an output terminal of the power transistor.
  • the power transistor is a UHV (Ultra high voltage) NMOS transistor
  • the hold current source is characterized in that it comprises a low voltage transistor or a high voltage transistor.
  • the power transistor may further include a resistor between the drain and the gate and a zener diode between the gate and the ground.
  • the dimmer may be a phase-cut dimmer.
  • the power supply unit includes an AC power source and a rectifier circuit of the AC power source, characterized in that the dimmer is installed on the connection line between the AC power source and the rectifier circuit.
  • the first LED unit to the n-th LED unit of the LED lighting unit of the LED structure including a single LED or two or more LEDs connected in series, or a complex structure of a LED group including a single LED and two or more LEDs connected in series
  • the LED group which is formed as one and includes two or more LEDs, is characterized in that the longest distance LED is connected to the LED switching circuit unit based on the power supply unit.
  • the internal power generation unit may include a power transistor having an input terminal connected to a connection line between the power supply unit and the LED lighting unit, a diode connected to an output terminal of the power transistor, a capacitor connected to an output terminal of the diode, and an output terminal of the diode. It may be to include a voltage regulator connected in parallel with the capacitor.
  • a circuit configuration for driving a dimmer and a circuit configuration for generating an internal power source share a key element, thereby enabling implementation of a circuit for dimmer driving and internal power generation through a relatively small integrated circuit. It is possible to provide an AC LED driving circuit that can provide a stable power supply.
  • FIG. 1 is a view showing a conventional general AC LED driving circuit
  • FIG. 2 is a view illustrating a state in which a dimmer and a hold current source for driving a dimmer of a conventional AC LED driving circuit are added.
  • FIG. 3 is a view showing an AC LED driving circuit capable of supplying a stable power according to an embodiment of the present invention
  • FIG. 4 is a diagram illustrating a state in which an embodiment of a power transistor is applied to an AC LED driving circuit capable of supplying stable power of FIG. 3.
  • FIG. 3 is a view showing an AC LED driving circuit capable of supplying a stable power according to an embodiment of the present invention.
  • AC LED driving circuit 100 capable of supplying a stable power according to an embodiment of the present invention is a power supply unit 110, LED lighting unit 120, It is configured to include a plurality of LED switching circuit 130, the internal power generation unit 140.
  • the power supply unit 110 supplies external power to the AC LED driving circuit 100.
  • the AC LED driving circuit 100 receives external power through the power supply unit 110.
  • the power supply unit 110 may include an AC power source 111 and a rectifier circuit 112 of the AC power source 111, and a bridge diode may be used as the rectifier circuit 112.
  • the power supply unit 110 may further include a dimmer 113 installed on the connection line between the AC power supply 111 and the rectifier circuit 112, the dimmer 113 is a phase-cut (Phase-cut) Method of dimmer is used.
  • the LED lighting unit 120 includes an n-th LED unit located at the longest distance from the power supply unit 110, starting with the first LED unit 120-1 positioned at the shortest distance from the connection point with the power supply unit 110.
  • the first LED unit 120-1 to the n-th LED unit of the LED lighting unit 120 each include a single LED or a group of LEDs including two or more LEDs connected in series, or a single LED and two or more LEDs connected in series. It may be formed in the form of any one of the composite structure of the LED group.
  • the LED group including two or more LEDs may be the longest distance LED is connected to the LED switching circuit unit based on the power supply.
  • the present embodiment has taken the form of the LED lighting unit 120 is composed of the first LED unit 120-1 to the third LED unit 120-3, the first LED unit 120-1 in the drawing
  • Each of the third LED unit 120-3 is represented by one LED, but this is for convenience of illustration only, and each LED unit should be understood as a concept including both a single LED or two or more LEDs connected in series. .
  • the switching circuit unit 130 is a plurality, and is individually connected to the output terminals of one or more LEDs forming the first LED unit 120-1 to the n-th LED unit to form a current supply channel for the corresponding LED or the LED unit.
  • a detailed illustration and description of the switching circuit unit 130 are omitted.
  • the switching circuit unit 130 a form including a field effect transistor (MOS FET) and an OP amplifier comparator may be used.
  • the field effect transistor may have a form in which a drain is connected to the LED output terminal of the LED lighting unit 120, a source is connected to the ground resistance, and a gate is connected to the OP amplifier comparator.
  • the internal power generator 140 is connected in parallel on the connection line between the power supply 110 and the LED lighting unit 120 to generate internal power for the operation of the LED lighting unit 120.
  • the internal power generator 140 may include a power transistor 141, a hold current source 142, a diode 143, a capacitor 144, and a voltage regulator 145.
  • the power transistor 141 has an input terminal connected in parallel to a connection line between the power supply unit 110 and the LED lighting unit 120.
  • the power transistor 141 is an ultra high voltage (UHV) NMOS transistor, but the present invention is not limited thereto.
  • the power transistor 141 may be a drain-source voltage breakdown such as a JFET, an NMOS, or a BJT. Any kind of transistor may be used as long as it is a transistor driven at hundreds of Volt.
  • the power transistor 141 may further include a resistor 141a between the drain and the gate and a zener diode 141b between the gate and the ground, and the resistor 141a and the zener diode 141b is for a gate bias of the UHV NMOS transistor.
  • Ultra high voltage (UHV) NMOS transistors also increase in gate voltage when the drain voltage rises, and when the DC voltage exceeds the rough DC level, the UHV (Ultra high voltage) NMOS transistor is turned on and current flows in the capacitor.
  • the diode blocks the discharge path of the voltage charged in the capacitor, so that the voltage charged in the capacitor can be maintained above a predetermined value for the entire cycle.
  • the hold current source 142 is connected to the output terminal of the power transistor 141.
  • the hold current source 142 functions to turn on / off a hold current for dimmer driving.
  • the hold current source 142 may include a low voltage transistor or a high voltage transistor, and the power transistor 141 is disposed at an input side of the hold current source 142 such that the power transistor ( 141 acts as a clamp for the ultra-high voltage input.
  • the hold current source 142 for dimmer driving may be formed to have a significantly smaller size than the driving units for dimmer driving of the existing AC LED driving circuit.
  • the integrated circuit for driving the dimmer and generating the internal power source may be configured in the form of a single power transistor 141, which may significantly reduce the chip size of the integrated circuit.
  • the diode 143 is connected in parallel with the hold current source 142 at the output terminal of the power transistor 141.
  • the capacitor 144 is connected to the output terminal of the diode 143.
  • the voltage regulator 145 is connected in parallel with the capacitor 144 at the output terminal of the diode 143.
  • the circuit used for the voltage regulator 145 may be a circuit such as a conventional low drop-out (LDO).
  • the high voltage AC power through the power supply 110 is lowered once again while passing through the power transistor 141. That is, the AC power of the power supply unit 110 passes through the bridge diode that is the rectifier circuit 112, and the AC power thus rectified through the power transistor 141 again.
  • the function of the power transistor 141 is to filter out the high-voltage AC power once more to lower the level suitable for the internal power generation, thereby obtaining a predetermined level of rough voltage (rough DC input).
  • the power passing through the bridge diode which is the rectifier circuit 112 varies from 0 to 300 (V), but after passing through the power transistor 141 again rectified by the diode 143 and the capacitor 144.
  • the power source can be maintained at tens of volts (V).
  • V volts
  • the internal power generator 140 has a structure in which the hold current source 142 for driving the dimmer 113 and the structure for generating the internal power share the power transistor 141, so that the internal power generator 140 may be manufactured in a relatively small size when fabricating an integrated circuit. In addition, it can stably perform two functions such as dimmer driving and internal power generation.
  • the present invention can be widely used in the LED drive circuit.

Landscapes

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

Abstract

La présente invention concerne un circuit de commande de DEL à courant alternatif (CA) capable de mettre en œuvre un circuit servant à commander un gradateur et à générer intérieurement de l'électricité par l'intermédiaire d'un circuit d'intégration de taille relativement réduite en partageant des éléments centraux entre un circuit de commande de gradateur et un circuit de génération électrique interne. Le circuit de commande de DEL à CA capable de fournir une alimentation stable, selon la présente invention, comporte: une unité d'alimentation électrique à laquelle est fournie une alimentation externe et comportant un gradateur; une unité d'éclairage à DEL caractérisée en ce qu'une première unité de DEL est située à la plus courte distance d'un point de raccordement avec l'unité d'alimentation électrique et en ce qu'une nième unité de DEL est située à la plus grande distance de l'unité d'alimentation électrique; une pluralité d'unités de circuits de commutation de DEL reliées individuellement à une extrémité de sortie d'une ou d'au moins deux DEL constituant les première à nième unités de DEL de façon à former une voie d'alimentation en courant vers une DEL ou une unité de DEL correspondante; et une unité de génération électrique interne reliée en parallèle à une ligne de raccordement entre l'unité d'alimentation électrique et l'unité d'éclairage à DEL pour générer intérieurement de l'électricité destinée à faire fonctionner l'unité d'éclairage à DEL, l'unité de génération électrique interne comportant: un transistor de puissance dont une extrémité d'entrée est reliée en parallèle à la ligne de raccordement entre l'unité d'alimentation électrique et l'unité d'éclairage à DEL; une source de courant de maintien reliée à une extrémité de sortie du transistor de puissance pour activer/désactiver un courant de maintien servant à commander le gradateur; une diode reliée en parallèle à la source de courant de maintien au niveau de l'extrémité de sortie du transistor de puissance; un condensateur relié à une extrémité de sortie de la diode; et un régulateur de tension relié en parallèle au condensateur au niveau de l'extrémité de sortie de la diode.
PCT/KR2014/009148 2013-10-02 2014-09-30 Circuit de commande de del à courant alternatif capable de fournir une alimentation stable WO2015050349A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0118174 2013-10-02
KR1020130118174A KR101539296B1 (ko) 2013-10-02 2013-10-02 안정적인 전원 공급이 가능한 교류 led 구동회로

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017015964A1 (fr) * 2015-07-30 2017-02-02 Tridonic Gmbh & Co Kg Circuit d'attaque directement en courant alternatif et luminaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090189546A1 (en) * 2008-01-28 2009-07-30 Shang-Yu Chang Chien Led dimming control circuit
US20090289559A1 (en) * 2008-05-20 2009-11-26 Texas Instruments Incorporated Led device and led driver
KR20100095826A (ko) * 2009-02-23 2010-09-01 주식회사 마블덱스 Ｌｅｄ 전등 및 그 ｌｅｄ 전등을 포함한 전기전자시스템
KR20130022206A (ko) * 2011-08-25 2013-03-06 주식회사 디에스이 정전력형 엘이디 전구 전원 제어장치
US20130093341A1 (en) * 2008-09-05 2013-04-18 Seoul Semiconductor Co., Ltd. Ac led dimmer and dimming method thereby

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101083785B1 (ko) * 2010-10-06 2011-11-18 (주) 이노비전 조명용 발광다이오드 구동회로
KR101397786B1 (ko) * 2012-03-21 2014-05-20 삼성전기주식회사 발광 다이오드 구동 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090189546A1 (en) * 2008-01-28 2009-07-30 Shang-Yu Chang Chien Led dimming control circuit
US20090289559A1 (en) * 2008-05-20 2009-11-26 Texas Instruments Incorporated Led device and led driver
US20130093341A1 (en) * 2008-09-05 2013-04-18 Seoul Semiconductor Co., Ltd. Ac led dimmer and dimming method thereby
KR20100095826A (ko) * 2009-02-23 2010-09-01 주식회사 마블덱스 Ｌｅｄ 전등 및 그 ｌｅｄ 전등을 포함한 전기전자시스템
KR20130022206A (ko) * 2011-08-25 2013-03-06 주식회사 디에스이 정전력형 엘이디 전구 전원 제어장치

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017015964A1 (fr) * 2015-07-30 2017-02-02 Tridonic Gmbh & Co Kg Circuit d'attaque directement en courant alternatif et luminaire
EP3329743A4 (fr) * 2015-07-30 2018-10-24 Tridonic GmbH & Co. KG Circuit d'attaque directement en courant alternatif et luminaire
US10542594B2 (en) 2015-07-30 2020-01-21 Tridonic Gmbh & Co Kg Direct AC driving circuit and luminaire

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Publication number Publication date
KR20150039515A (ko) 2015-04-10
KR101539296B1 (ko) 2015-07-24

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