WO2014110915A1 - 一种led线性智能调光模块 - Google Patents

一种led线性智能调光模块 Download PDF

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Publication number
WO2014110915A1
WO2014110915A1 PCT/CN2013/084101 CN2013084101W WO2014110915A1 WO 2014110915 A1 WO2014110915 A1 WO 2014110915A1 CN 2013084101 W CN2013084101 W CN 2013084101W WO 2014110915 A1 WO2014110915 A1 WO 2014110915A1
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constant current
load
current source
source
driving tube
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PCT/CN2013/084101
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English (en)
French (fr)
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连宗山
吴金水
马文军
许志华
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厦门海莱照明有限公司
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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]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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 lighting driving device, in particular to a driving module for LED lighting.
  • LED lamps have been widely used in the lighting industry: the driving technology of LED indoor lighting fixtures is changing with each passing day. At present, most of the indoor LED lighting fixtures are driven by a large-scale integrated switching power supply, and coils such as inductors and transformers are used. The price is high, the structure is complicated, and the installation is difficult. The LED lamps have been restricted in the lighting industry. development of. Considering that a large number of LED lamps must enter the consumer market in large quantities, directly replacing the traditional lamp source, its price positioning is affordable to the public, which is an inevitable goal, but in the current switching power supply scheme, the above components are more It is very difficult for the drive circuit to reach parity.
  • the present invention provides an LED linear intelligent dimming module, and the technical scheme thereof is as follows:
  • An LED linear intelligent dimming module includes:
  • a load circuit connected between the positive and negative poles of the power supply, sequentially including a main constant current source in the forward series, a sampling resistor, a diode and a load;
  • the expansion branch includes a constant current source, a driving tube and a bias resistor, wherein the secondary constant current source is connected in series with the CE pole of the driving tube, and then is connected in parallel to the load; a resistor is connected between the positive pole of the load and the B pole of the drive tube;
  • the terminals 1 and 2 of the light-emitting tube are connected in parallel with the sampling resistor; the terminals 3 and 4 of the transistor are respectively connected to the B-pole and the E-pole of the driving tube;
  • the AC power source is from the output end of the thyristor dimmer; when the dimmer output is the maximum power, the trigger optocoupler is turned on, the main constant current The source and secondary constant current sources are in a constant current state. When the dimmer output is non-maximum power, the trigger optocoupler output voltage changes, and the main constant current source and the secondary constant current source are in an on state.
  • the load includes a series of LED light sources in series and an electrolytic capacitor in parallel with the LED light source group.
  • the positive and negative poles of the power supply are connected to the positive and negative poles of a rectifier bridge, and the AC terminal of the rectifier bridge is connected to the output end of the dimmer.
  • the primary constant current source and the negative constant current source are constant current diodes.
  • the constant current diode and the driver tube are co-packaged in the same chip.
  • the chip has at least eight output leads that are independently outputted to the leads of the respective constant pin diodes.
  • the self-adaptive function of dimming and constant current is realized, so that the load can be connected with the traditional thyristor dimmer, and the circuit has a very simple circuit, omitting the coil components such as the inductor and the transformer, resulting in less material cost. .
  • the simple structure enables the circuit to realize dimming, has good reliability, is easy to mass production, and is easy to debug.
  • FIG. 1 is a circuit diagram of a first embodiment of the present invention
  • FIG. 2 is a circuit diagram of a second embodiment of the present invention.
  • Figure 3 is a schematic illustration of the chip of the embodiment of Figure 2.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a schematic circuit diagram of a first embodiment of the present invention.
  • the dimming module includes a load circuit, a current spreading branch, and a triggering optocoupler that controls the expanding branch.
  • the load circuit is connected between the positive and negative poles of the power supply, and includes a main constant current source S2, a sampling resistor R1, a diode D and a load RL, and the components with polarity in the load circuit are in accordance with the current. The flow is forward in series.
  • the load RL contains an LED light source.
  • Another expansion branch includes a constant current source S2, a driving tube T1 and a bias resistor R2, wherein the secondary constant current source S2 is connected in series with the CE pole of the driving tube T1. And is further connected in parallel to both ends of the load RL; the bias resistor R2 is connected between the positive pole of the load RL and the B pole of the driving tube; the branch of the driving current is controlled by a triggering optocoupler OC1, the inner 1 and 2 ends thereof Corresponding to the positive and negative electrodes of the arc tube, the 3 and 4 terminals correspond to the C and E poles of the transistor. Therefore, the voltage states of the terminals 1 and 2 control the on/off states of the 3 and 4 terminals.
  • the triggering optocoupler OC1 has its first and second ends of the arc tube connected in parallel with the sampling resistor R1, that is, the 1 terminal is connected to the high potential of R1, and the 2 terminal is connected to the low potential of R2; the 3 and 4 terminals of the transistor are respectively connected to the driving tube.
  • the B pole and the E pole of T1 are connected.
  • the positive and negative poles of the power supply are connected to the rectified AC power source from the output of the thyristor dimmer (not shown).
  • the principle of the thyristor dimmer is that the waveform is complete or The full-wave rectified signal that was cut off.
  • the effective value of the rectified signal on the positive and negative poles is the largest; and when the dimmer starts to adjust, the effective value of the rectified signal on the positive and negative poles is weakened accordingly.
  • This embodiment has two distinct working states.
  • the first state corresponds to the maximum power output by the dimmer, which can be referred to as a full load state; the second state corresponds to when the dimmer output is not the maximum power, which can be called It is the adjustment state. among them:
  • the main constant current source S1 When the state is full, the effective value of the rectified signal on the positive and negative poles is the largest, and the main constant current source S1 is set to a constant current state at this time, and the trigger optocoupler OC1 is turned on, that is, the light pipes of the terminals 1 and 2 are turned on, so that 3
  • the secondary constant current source S2 is also in a constant current state, so the current in the load circuit is constant, the current value flowing through R1, D, and RL is stable, and the load RL is constant current. .
  • the component state also changes: the current of the load circuit falls, so that the voltage across the sampling resistor R1 decreases, and the optocoupler In the OC1, the illumination of the LEDs at the 1st and 2nd ends is turned from dark to dark, so the voltage at terminals 3 and 4 changes from high to low.
  • the primary constant current source S1 and the secondary constant current source S2 are converted into a non-constant current conduction state.
  • the operating state of T1 changes from saturation to saturation and then enters the cutoff, and the C-to-E-pole voltage changes with the output of the TRIAC dimming.
  • the load RL is no longer in a constant current operation state, but as the output of the thyristor dimming changes, its operating current changes, and normal dimming under the connection with the thyristor dimmer is achieved.
  • the module realizes the adaptive function of dimming and constant current, so that the load RL can be connected with the traditional thyristor dimmer, and has a very simple circuit, and the main and auxiliary constant current sources can use various semiconductor devices.
  • the coil components such as inductors and transformers are omitted. Therefore, on the one hand, a small number of components bring less material cost.
  • its simple structure enables a circuit for dimming, has good reliability, is easy to mass-produce, and is easy to debug.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 and FIG. 3 are schematic diagrams of Embodiment 2 of the present invention.
  • the load of this embodiment includes a series of LED light source groups and an electrolytic capacitor C1 connected in parallel with the LED light source group, and integrates a rectifier bridge B, which is connected to the positive and negative poles of the rectifier bridge B, the rectification
  • the bridge B AC terminal is connected to the dimmer output (not shown), that is, the direct replacement is connected to the original dimming circuit.
  • the main constant current source and the negative constant current source are constant current diodes Z1 and Z2, respectively.
  • the forward volt-ampere characteristic of the constant current diode realizes a structure in which the constant current source is turned on and the constant current switching function is very simple, and has a cost advantage.
  • the remaining components are similar to the first embodiment.
  • the constant current diode and the driving tube are collectively packaged in the same chip IC, and the chip IC has a total of 8 output leads of 1-8, and the constant current diodes Z1 and Z2 are independent from the respective pins of the driving tube T1.
  • the output is connected to the lead as shown in FIG.
  • the scheme of the chip further simplifies the circuit of the second embodiment.
  • the volume of the circuit is improved, the structure of the whole lamp and the heat dissipation condition are improved, and on the other hand, the driving tube T1 and the constant current diodes Z1 and Z2 can be realized.
  • Integrated production, debugging at the same time is very convenient, with high consistency, greatly improving the efficiency of the program in mass production, especially suitable for compact LED replacement lamps, with good economic benefits.
  • the scheme realizes the self-adaptive function of dimming and constant current, so that the load can be connected with the traditional thyristor dimmer, and has a very simple circuit, omitting the coil components such as the inductor and the transformer.

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

Abstract

一种LED线性智能调光模块，包括：负载回路，连接于电源正负极之间，顺次包括正向串联的一主恒流源（S）、一采样电阻（R1）、一二极管（D）和一负载（RL）；扩流支路，包括一副恒流源（S2）、一驱动管（T1）和一偏置电阻（R2），其中该副恒流源（S2）与该驱动管（T1）的CE极相正向串联后，再整体并联于所述负载（RL）；该偏置电阻（R2）连接于该负载（RL）正极和驱动管（T1）B极之间；以及一触发光耦（OC1），其发光管的1,2端与所述采样电阻（R1）正向并联；其晶体管的3,4端分别与所述驱动管（T1）B极和E极相连。所述模块实现了调光和恒流的自适应，其负载能够与传统可控硅调光器驳接。

Description

一种LED线性智能调光模块 技术领域
本发明涉及一种照明驱动装置，具体是一种用于LED照明的驱动模块。
背景技术
LED灯具已在照明行业广泛的应用：LED室内照明灯具的驱动技术日新月异。目前室内LED照明灯具的驱动大部分都是大规模采用高度集成的开关电源，并且采用了电感、变压器等线圈器件，价格居高不下，结构复杂、安装困难，己经制约了LED灯具在照明行业的发展。考虑到海量的LED灯具必须大批量进入消费市场，直接替代传统的灯具光源，其价格定位为大众可接受的平价，是一个必然的目标，但在目前的开关电源方案中，上述元器件较多的驱动电路达到平价的难度很高。
另一方面，既然提到了灯具的替代，LED灯具中相当的一部分必须直接换用在带有调光装置的回路中，而且，这类调光装置及其普遍的一类就是运用可控硅的斩波式调光电路。由于上述LED驱动部分本身的复杂性，加之需要适应可控硅调光的需求，其驱动模块往往过于繁琐和庞大，一方面物料成本高，无法达到平价商品的目标，另一方面其复杂度影响了整灯的可靠性。
发明内容
针对现有LED驱动模块元件多、复杂且难以适应可控硅调光的问题，本发明提出一种LED线性智能调光模块，其技术方案如下：
一种LED线性智能调光模块，包括：
负载回路，该负载回路连接于电源正负极之间，顺次包括正向串联的一主恒流源、一采样电阻、一二极管和一负载；
扩流支路，包括一副恒流源、一驱动管和一偏置电阻，其中该副恒流源与该驱动管的CE极相正向串联后，再整体并联于所述负载；该偏置电阻连接于该负载正极和驱动管B极之间；以及
一触发光耦，其发光管的1,2端与所述采样电阻正向并联；其晶体管的3,4端分别与所述驱动管B极和E极相连；
其中，所述电源正负极连接已整流的交流电源，该交流电源来自可控硅调光器的输出端；当调光器输出为最大功率时，该触发光耦导通，该主恒流源和副恒流源为恒流状态。当该调光器输出为非最大功率时，该触发光耦输出电压发生变化，该主恒流源和副恒流源为导通状态。
作为本方案的一些可选的改进，可以有如下方面的体现：
在较佳实施例中，该负载包括串联的LED光源组和与该LED光源组并联的电解电容。
较佳实施例中，该电源正负极连接一整流桥的正负极，该整流桥交流端连接所述调光器输出端。
在较佳实施例中，所述主恒流源和负恒流源为恒流二极管。
在较佳实施例中，所述恒流二极管和驱动管共同封装于同一芯片内。
在较佳实施例中，该芯片具有至少8个输出引线，该恒流二极管与驱动管各自的引脚独立输出连通于该引线。
本技术方案带来的有益效果有：
1. 实现了调光和恒流的自适应功能，使负载可以与传统可控硅调光器驳接，并且具有十分简单的电路，省略了电感、变压器等线圈部件，带来了较少的物料成本。
2. 简单的结构使能实现调光的电路，具有较好的可靠性，易于批量生产，调试简单。
3. 利用恒流二极管的正向伏安特性实现了恒流源导通、恒流切换功能十分简单的结构，具有成本优势。
4. 将恒流二极管和驱动管整合于同一芯片的方案，使电路得到更进一步简化，一致性好，调试方便，具有很好的生产效率。
附图说明
以下结合附图实施例对本发明作进一步说明：
图1是本发明实施例一的电路图；
图2是本发明实施例二的电路图；
图3是图2所示实施例芯片的示意图。
具体实施方式
实施例一：
如图1所示，本发明实施例一的电路示意图。
此调光模块包括一个负载回路、一个扩流支路和控制该扩流支路的触发光耦。其中负载回路连接于电源正负极之间，它顺次包括一主恒流源S2、一采样电阻R1、一二极管D和一负载RL，该负载回路中带有极性的元器件均按照电流的流向正向串联。其中，负载RL包含了LED光源。
另有一扩流支路，该扩流支路包括一副恒流源S2、一驱动管T1和一偏置电阻R2，其中该副恒流源S2与该驱动管T1的CE极相正向串联，再整体并联于负载RL的两端；该偏置电阻R2连接于该负载RL正极和驱动管B极之间；控制该扩流支路的是一个触发光耦OC1，其内部1,2端对应发光管的正极和负极，其3,4端对应晶体管的C极和E极，所以，1,2端的电压状态控制了3,4端的导通/截止状态。该触发光耦OC1其发光管的1,2端与采样电阻R1正向并联，即，1端接R1的高电位，2端接R2的低电位；其晶体管的3,4端分别与驱动管T1的B极和E极相连。
以下是该实施例的工作过程：
电源正负极实则连接已整流的交流电源，该交流电源来自可控硅调光器的输出端（未标示），如可控硅调光器原理，此电源正负极得到的是波形完整或被斩断削减的全波整流信号。当调光器输出为最大功率时，该正负极上整流信号的有效值最大；而当调光器开始调节时，该正负极上整流信号的有效值随之减弱变化。
本实施例具有两个明显的工作状态，第一个状态对应了调光器输出的最大功率，可称之为满载状态；第二个状态对应了调光器输出为非最大功率时，可称之为调节状态。其中：
当满载状态时，该正负极上整流信号的有效值最大，设定此时主恒流源S1为恒流状态，触发光耦OC1导通，即1,2端的发光管导通，使3,4端亦处于导通；同时，副恒流源S2也是处于为恒流状态，所以此时负载回路中的电流被恒定，流经R1、D和RL的电流值稳定，负载RL恒定电流工作。
在上述满载状态的基础上，当调节可控硅调光器，使电路处于调节状态时，其元件状态也随之发生变化：负载回路的电流下落，从而采样电阻R1两端电压下降，光耦OC1中1,2端的发光管的发光由亮转暗到不亮，所以3,4端电压由高变低。该状态下主恒流源S1和副恒流源S2转化为非恒流的导通状态。另一方面，此时T1的工作状态由放大进入饱和再进入截止，C极到E极电压随着可控硅调光的输出而变化。此状态下负载RL不再处于恒流工作的状态，而是随着可控硅调光的输出变化，其工作电流发生变化，实现了与可控硅调光器驳接下的正常调光。
可见，本模块实现了调光和恒流的自适应功能，使负载RL可以与传统可控硅调光器驳接，并且具有十分简单的电路，主、副恒流源可以用多种半导体器件实现，省略了电感、变压器等线圈部件。所以，一方面，少量的元器件带来了较少的物料成本，另一方面，其简单的结构使能实现调光的电路，具有较好的可靠性，易于批量生产，调试简单。
实施例二:
如图2和图3所示，本发明实施例二的示意图。
该实施例的负载，包括了串联的LED光源组和与该LED光源组并联的电解电容C1，并且，整合了一个整流桥B，该电源正负极连接整流桥B的正负极，该整流桥B交流端连接调光器输出端（未标示），也即，直接替换连接于原有调光电路中。
在本实施例中，主恒流源和负恒流源分别为恒流二极管Z1和Z2。利用恒流二极管的正向伏安特性实现了恒流源导通、恒流切换功能十分简单的结构，具有成本优势。其余部件与实施例一类似。
特别地，本实施例中，恒流二极管和驱动管共同封装于同一芯片IC内，该芯片IC具有1-8共8个输出引线，恒流二极管Z1、Z2与驱动管T1各自的引脚独立输出连通于该引线，如图3所示。该芯片的方案使本实施例二的电路得到进一步简化，一方面改善了电路的体积，改善了整灯结构、散热方面的状况，另一方面可实现驱动管T1和恒流二极管Z1、Z2的整合生产，同时调试非常方便，具有较高的一致性，大幅度地提升了批量生产时本方案的效率，特别适用于紧凑型的LED替换灯具，具有很好的经济效益。
以上所述，仅为本发明较佳实施例而已，故不能依此限定本发明实施的范围，即依本发明专利范围及说明书内容所作的等效变化与修饰，皆应仍属本发明涵盖的范围内。
工业实用性
本方案实现了调光和恒流的自适应功能，使负载可以与传统可控硅调光器驳接，并且具有十分简单的电路，省略了电感、变压器等线圈部件。

Claims (6)

  1. 一种LED线性智能调光模块，其特征在于：包括：
    负载回路，该负载回路连接于电源正负极之间，顺次包括正向串联的一主恒流源、一采样电阻、一二极管和一负载；
    扩流支路，包括一副恒流源、一驱动管和一偏置电阻，其中该副恒流源与该驱动管的CE极相正向串联后，再整体并联于所述负载；该偏置电阻连接于该负载正极和驱动管B极之间；以及
    一触发光耦，其发光管的1,2端与所述采样电阻正向并联；其晶体管的3,4端分别与所述驱动管B极和E极相连；
    其中，所述电源正负极连接已整流的交流电源，该交流电源来自可控硅调光器的输出端；当调光器输出为最大功率时，该触发光耦导通，该主恒流源和副恒流源为恒流状态；当该调光器输出为非最大功率时，该触发光耦输出电压发生变化，该主恒流源和副恒流源为导通状态。
  2. 根据权利要求1所述一种LED线性智能调光模块，其特征在于：该负载包括串联的LED光源组和与该LED光源组并联的电解电容。
  3. 根据权利要求1所述一种LED线性智能调光模块，其特征在于：该电源正负极连接一整流桥的正负极，该整流桥交流端连接所述调光器输出端。
  4. 根据权利要求1或2或3所述一种LED线性智能调光模块，其特征在于：所述主恒流源和负恒流源为恒流二极管。
  5. 根据权利要求4所述一种LED线性智能调光模块，其特征在于：所述恒流二极管和驱动管共同封装于同一芯片内。
  6. 根据权利要求5所述一种LED线性智能调光模块，其特征在于：该芯片具有至少8个输出引线，该恒流二极管与驱动管各自的引脚独立输出连通于该引线。
PCT/CN2013/084101 2013-01-21 2013-09-24 一种led线性智能调光模块 WO2014110915A1 (zh)

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