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WO2018014878A1 - 一种万能led驱动控制器 - Google Patents

一种万能led驱动控制器 Download PDF

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Publication number
WO2018014878A1
WO2018014878A1 PCT/CN2017/093952 CN2017093952W WO2018014878A1 WO 2018014878 A1 WO2018014878 A1 WO 2018014878A1 CN 2017093952 W CN2017093952 W CN 2017093952W WO 2018014878 A1 WO2018014878 A1 WO 2018014878A1
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Prior art keywords
resistor
input
load
control circuit
output
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PCT/CN2017/093952
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English (en)
French (fr)
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尤建兴
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得能创科有限公司
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Publication of WO2018014878A1 publication Critical patent/WO2018014878A1/zh

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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]

Definitions

  • the invention relates to the technical field of LED lighting device driving circuits, in particular to a universal LED driving controller.
  • LED drive refers to a converter that converts a power supply (such as high-voltage power frequency AC, that is, mains, low-voltage high-frequency AC, such as the output of an electronic transformer) into a specific voltage and current to drive the LED lighting device or device to operate. Said to convert the power supply through a device such as a transformer to a rated power suitable for the operation of the lighting device or device.
  • the control circuit is generally configured for the LED driver, and the control circuit controls the LED driver according to the corresponding flow feedback result (ie, the LED driving circuit, referred to as the driving circuit for short).
  • the traditional control circuit only controls the driving circuit based on the comparison output of the reference resistor and the current measuring resistor.
  • the voltage fluctuation of the structure is large, the accuracy is unstable, and the output error of the control circuit is large, and the driving circuit is not working properly.
  • the reference resistor is generally used in conjunction with a constant current source, and a constant current source composed of different types of devices (for example, a triode) is used, and since the parameters are different (for example, the base voltage is a non-fixed value), even the same type of the same device is used.
  • a constant current source composed of different types of devices (for example, a triode) is used, and since the parameters are different (for example, the base voltage is a non-fixed value), even the same type of the same device is used.
  • the voltage will fluctuate under different working currents, so it is not suitable for precise constant current requirements, and thus it can be known that the use of constant current source leads to such a circuit structure.
  • the traditional control circuit can only be applied to LED load applications of a certain model or parameter, and the applicable voltage range (dimming range) and other applicability indicators are very narrow, which is not conducive to LED Driver versatility and the goal of reducing design development costs; or pluggable LEDs
  • the structure of the plug-in type current-sense resistor although it can achieve the goal of LED load applications for various models or parameters, the equivalent of the connector (or plug) pin introduced by the pluggable current-sense resistor
  • the influence of the resistance on the current-sense resistance is not negligible, and the influence is extremely large, which may easily lead to a large output error of the control circuit, which may cause the driving circuit to work abnormally. Therefore, it is difficult to meet the versatility, safety and reliability requirements of the LED driver at the same time.
  • the invention can not apply different LED load ranges to the existing LED-driven control circuit, and the existing control circuit has poor versatility or can not meet the requirements of versatility and safety reliability requirements, thus resulting in a problem of high repetitive design cost.
  • a universal LED drive controller which can be applied to different load applications and improve LED drive control by configuring the resistor and the reasonable configuration of the control circuit of the specific multi-input to realize the accurate current feedback function.
  • the versatility of the device while meeting safety and reliability requirements, reduces design cycles and costs.
  • a universal LED driving controller comprising a reference resistor, a current measuring resistor and a load, characterized in that it further comprises a driving a circuit, a control circuit and a configuration resistor, the drive circuit having at least two inputs and an output, the control circuit having at least two inputs and an output, one end of the reference resistor and one end of the current-sense resistor Both are connected to the output end of the load, and the other end of the reference resistor is simultaneously connected to one input end of the driving circuit and the output end of the control circuit, and the other end of the current measuring resistor is connected to the other input end of the driving circuit and the output end of the driving circuit.
  • a power input end of the load is connected to the input power source, an input end of the control circuit inputs a control voltage signal, another input end of the control circuit is connected to one end of the configuration resistor, and the other end of the configuration resistor is grounded;
  • the configuration resistor is a plug-in adjustable resistor or a knob-type adjustable resistor, and the plug-in LED load is a plug-in LED lamp.
  • the configuration resistor adopts two or more plug-in adjustable resistors or knob-type adjustable resistors, and two ends of two or more plug-in adjustable resistors or knob-type adjustable resistors are connected in parallel to the input end of the control circuit, and are connected in parallel. The other end is grounded.
  • the control circuit includes a follower and a transistor, an input of the follower inputs a control voltage signal for an input of the control circuit, and another input of the follower is a simultaneous connection of another input of the control circuit
  • One end of the resistor and the emitter of the triode, the output of the follower is connected to the base of the triode, and the collector of the triode is the output of the control circuit.
  • the follower is a voltage follower; the triode is an NPN type triode.
  • the driving circuit comprises a comparator and a power transistor, an input of the comparator is an input end of the driving circuit, and another input end of the comparator is another input end of the driving circuit, the comparator The output end is connected to the input end of the power transistor, and the output end of the power transistor is the output end of the driving circuit.
  • the driving circuit includes an operational amplifier and a power transistor, an input end of the operational amplifier is an input end of the driving circuit, and another input end of the operational amplifier is another input end of the driving circuit, the operational amplifier The output end is connected to the input end of the power transistor, and the output end of the power transistor is the output end of the driving circuit.
  • the control voltage in the control voltage signal ranges from 0-10V.
  • the configuration resistor has a value ranging from 50 ⁇ to 500 k ⁇ .
  • the configuration resistor takes a value that maintains its partial voltage at 1V.
  • the invention relates to a universal LED driving controller, comprising a driving circuit with a specific multi-input, a control circuit with a specific multi-input and a configuration resistor with adjustable resistance and a plug-in LED load, each component having a specific connection and mutual
  • a universal LED driving controller comprising a driving circuit with a specific multi-input, a control circuit with a specific multi-input and a configuration resistor with adjustable resistance and a plug-in LED load, each component having a specific connection and mutual
  • the configuration resistor and the multi-input control circuit by selecting the configuration resistor and the multi-input control circuit, the reference load resistor and the current-sense resistor are used to monitor the driving load current to achieve accurate current feedback feedback.
  • the drive circuit uses the reference resistor and the current-sense resistor to reference current and sense current.
  • the current is converted into a voltage input comparison to determine the driving load current state and output a driving voltage signal to drive the load (the present invention
  • the proposed drive controller actually drives the current-sense resistor and the load, that is, the LED load, as a whole load.
  • the control circuit generates an adjustment current signal through the control voltage signal obtained by each input terminal and the LED voltage division signal of the configuration resistor.
  • the adjustment current signal is further matched with a reference resistor to generate an adjustable (or controllable dimming) reference current input to the driving circuit to drive the load (ie, the above load as a whole), to achieve LED driving precision and reliability, and the LED realized by the structure
  • the drive controller realizes a stable constant current voltage by configuring the resistor and the matched control circuit, eliminating the need for a constant current source, and avoiding voltage fluctuations caused by different parameters caused by different types of devices caused by the constant current source of the existing controller.
  • the problem of unstable accuracy also avoids the error caused by the introduction of equivalent resistance of the connector pin by the plug-in side current resistor in the prior art; in addition, the control voltage suitable for different applications is the illumination requirement of different LED illumination.
  • the LED driving controller of the invention can be applied to different load applications, and the reliability and versatility of the LED driving controller are also improved, and the problem of repeated design development of different application requirements is avoided, and the design cycle and cost are reduced. .
  • the control circuit in the universal LED driving controller of the present invention can use a follower (preferably voltage follower) and a triode to cooperate with the input control voltage signal to form a circuit structure which can be called a signal voltage regulator to further control the driving circuit driving load (ie
  • the above load is integrated; the driving circuit can adopt a comparator (or operational amplifier) and a power transistor, and an output end of the comparator (or operational amplifier) is connected to the input end of the power transistor, and the output end of the power transistor is the output end of the driving circuit.
  • the configuration resistor uses two or more plug-in adjustable resistors or knob-type adjustable resistors connected in parallel to achieve the maximum driving current to drive the load.
  • FIG. 1 is a schematic structural view of a universal LED driving controller according to the present invention.
  • FIG. 2 is a schematic view showing a preferred structure of the universal LED driving controller of the present invention.
  • the invention relates to a universal LED driving controller, and its structural schematic diagram is shown in FIG. 1 , including a reference resistor R 1 , a current measuring resistor R 2 , a configuration resistor R 3 , a driving circuit, a control circuit and a load, and the driving of the embodiment
  • the circuit has two inputs and an output, such as the first input of the drive circuit, the second input of the drive circuit, and the output of the drive circuit, as shown in Figure 1, the control circuit has two inputs and an output, the first input control circuit of FIG.
  • the circuit no longer uses a constant current source, but achieves a stable constant current voltage by selecting a configuration resistor R 3 and a multi-input control circuit (the control circuit in this embodiment has two inputs), and also utilizes the reference resistor R 1 and The current-sense resistor R 2 monitors and compares its respective two currents to achieve accurate current feedback function; in addition, it can be combined with the control voltage V c (also called the dimming voltage of the LED load illumination) for different applications.
  • Range control, adjustable resistance R 3 and pluggable load devices enable the controller to be applied to different LED load requirements, improving controller versatility and reliability, and reducing design Cycle and cost.
  • the control voltage V c in the control voltage signal may range from 0 to 10 V; the value of the configuration resistor R 3 may be selected to maintain a voltage division of 1 V, or a configuration resistor R The value range of 3 may be 50 ⁇ -500 k ⁇ ; in addition, the configuration resistor may preferably adopt a structure in which two or more plug-in adjustable resistors (or knob-type adjustable resistors) are connected in parallel, that is, two or more plug-in type One end of the adjustable resistance (or the knob adjustable resistor) is connected to the second input end of the control circuit, and the other end of the two or more plug-in adjustable resistors (or the knob adjustable resistor) is connected in parallel, and the other end is grounded.
  • two or more plug-in adjustable resistors or knob-type adjustable resistors
  • the control circuit may be further configured to adjust the total resistance value of the resistance through the parallel connection manner using resistors, current adjustment means further disposed on the resistor 3 R, which means a second input terminal of the input current control circuit further adjust (or input voltage) and further by the control circuit controls the driving circuit to drive the LED load, for example, assume values plug arranged adjustable resistor R 3 of the resistor is 100 k [Omega used, its partial pressure is kept 1V, then a Pull adjustable resistor current which is 10 [mu, when the plug is connected in parallel ten adjustable resistance can be obtained the maximum total input current of 100 ⁇ A common, further control voltage with e.g. 0-10V signal (V c) Input 0 to 100% LED load dimming driven by maximum drive current.
  • FIG. 2 is a schematic diagram of a preferred structure of the universal LED driving controller of the present invention, as shown in FIG. 2, including a reference resistor R 1 , a current measuring resistor R 2 , a configuration resistor R 3 , a driving circuit, a control circuit and a load, and the implementation
  • the driving circuit of the example has two input ends and one output end, that is, a first input end of the driving circuit 1, a second input end 2 of the driving circuit and an output end of the driving circuit
  • the control circuit has two input ends and one output end , that is, the first input terminal of the control circuit, the second input terminal 2 of the control circuit, and the output terminal of the control circuit, wherein the control circuit includes a follower (which may be a voltage follower or a current follower, as shown in FIG.
  • Embodiments may employ a voltage follower) and a triode (which may be an NPN-type triode or a PNP-type triode, the embodiment shown in Figure 2 uses an NPN-type triode), an input of the follower (eg, a "+” input) ) to control the first input of the circuit input voltage control signal, the other input terminal of the follower (e.g., "-" input terminal) is connected to one end of resistor R 3 configuration 2 while the second input of the control circuit and three
  • the emitter of the tube, the output of the follower is connected to the base of the transistor, the collector of the transistor is the output of the control circuit;
  • the drive circuit comprises a comparator (an operational amplifier can also be used, the embodiment shown in Figure 2 is a comparator and a power transistor, an input of the comparator (eg, an inverting input) is a first input 1 of the driver circuit, and the other input of the comparator (eg, a non-inverting input) is a second input of
  • the output end of the comparator is connected to the input end of the power transistor, and the output end of the power transistor is the output end of the driving circuit; of course, the comparator in the embodiment shown in FIG. 2 can also be replaced with an operational amplifier, and the driving circuit includes An operational amplifier and a power transistor, an input terminal of the operational amplifier is a first input terminal 1, and the other input terminal of the operational amplifier is a second input terminal 2 of the driving circuit, and an output terminal of the operational amplifier is connected to an input end of the power transistor, the power transistor The output end is the output end of the driving circuit.
  • One end of the reference resistor R 1 and one end of the current measuring resistor R 2 are connected to the output end of the load.
  • resistors R 1 With reference to the other end of resistors R 1 is driven while connected to the inverting input of the comparator circuit and a control circuit in the collector of the transistor, the other end of the sense resistor R 2 connected to the drive circuit input terminal of the comparator and The output end of the power transistor, the output end of the comparator is connected to the input end of the power transistor, the power input end of the load is connected to the input power source V cc , and the "+" input terminal of the follower in the control circuit inputs the control voltage signal (or the connection control voltage V c), the control circuit of the "-" input terminal and one end of resistor R 3 configuration is connected to the other end of the resistor R disposed to 3;
  • R 3 may preferably be configured as a resistor pluggable adjustable resistor, i.e.
  • the configuration Resistor R 3 has a pluggable connector or plug, or has a plug-in terminal block, so as to realize the replacement of the configuration resistor R 3 of different types of parameters and realize plug-and-play;
  • the load can be a plug-in LED load, preferably It can be a plug-in LED lamp, that is, the LED load has a pluggable connector or plug, or has a plug-in terminal block, so as to realize LED load of different model parameters. Replace the plug and play well.
  • the control voltage V c in the control voltage signal may range from 0 to 10 V; the value of the configuration resistor R 3 may be selected to maintain a voltage division of 1 V, or the configuration resistor R 3 may have a value range of 50 ⁇ . -500k ⁇ .
  • the working principle of the universal LED driving controller involved in the present invention is as follows:
  • the LED drive controller converts the reference current and the detection current from the current to the voltage through the reference resistor R 1 and the current measuring resistor R 2 as shown in FIGS. 1 and 2 , specifically, through the reference resistor R. 1 Converting the reference current into a reference voltage (also referred to as a current-limiting voltage), and measuring the current-converted current-measuring voltage (also referred to as a detection voltage) through the current-sense resistor R 2 , and then comparing by the comparison shown in FIG.
  • a reference voltage also referred to as a current-limiting voltage
  • a detection voltage also referred to as a detection voltage
  • the device compares the magnitudes of the two voltage values (ie, the reference voltage and the current-sense voltage) to determine whether the detected current (ie, the current-measuring voltage) is higher than the reference current (ie, equivalent to the current-limiting voltage). That is, whether the detection current is within a reasonable safe value range with respect to the reference current.
  • the two inputs of the comparator the non-inverting input connected to the current-sense resistor R 2 (generally labeled as "+” input) and the inverting input connected to the reference resistor R 1 (general identification)
  • the comparator For the "-" input terminal), when the input voltage of the non-inverting input terminal > the input voltage of the inverting input terminal, the comparator outputs a high level; when the input voltage of the non-inverting input terminal ⁇ the input voltage of the inverting input terminal, the comparator outputs a low voltage. level.
  • the level of the comparator output level it can be judged whether the driving load current state is detected at this time, that is, whether the detection current (that is, the current measuring voltage) is higher than the reference current (that is, equivalent to the current limiting voltage), that is, relative to the reference current. Check if the current is within a reasonable safe value range. Further according to the data comparator determines the driving state of the load current input terminals and outputs the obtained level to the transistor shown in FIG power to drive a load (the drive controller in the embodiment of the present embodiment is measured and the load resistor R 2 i.e.
  • the LED load is driven together as a whole load, specifically by changing the current-sense resistor R 2 and the load, ie the current on the LED load branch, to drive the load, ie the LED load, through the power transistor; the follower in the control circuit (preferably voltage follow-up)
  • the control voltage signal ie, the V c value, also known as the dimming voltage signal
  • the obtained configuration resistor R 3 divides the voltage signal to generate an adjusted current signal, which is simultaneously input to the inverting input terminal of the comparator shown in FIG. 2 through the NPN type transistor as shown in FIG.
  • the R 1 connection terminal further generates an adjustable (or controllable dimming) reference current input to the driving circuit to drive the load (ie, the above-mentioned load as a whole) with the reference resistor R 1 .
  • the input dimming voltage signal forms a circuit structure that can be called a signal voltage regulator to further control the driving circuit to drive the load.
  • the universal LED driving controller proposed by the invention adopts a configuration resistor R 3 with an adjustable resistance such as a plug-in adjustable resistor and a pluggable LED load configuration structure, which avoids the single configuration in the prior art and can only be used.
  • the connector or plug of pluggable current measuring resistor introduces equivalent resistance It is not negligible, and it is easy to cause abnormal detection results, which in turn causes defects in controlling the driving function.
  • the present invention adopts a pluggable configuration resistor R 3 , and the head or the plug introduces an equivalent resistance (about several to several tens of ⁇ ).
  • the controller of the present invention realizes the application for different LED load requirements.
  • the universal/universal function it cooperates with other devices in the controller to achieve accurate current feedback feedback, which improves the versatility of the LED drive controller while satisfying safety and reliability. Sexual requirements.

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Abstract

一种万能LED驱动控制器，包括参考电阻(R1)、测流电阻(R2)、负载、驱动电路、控制电路和配置电阻(R3)，参考电阻(R1)的一端以及测流电阻(R2)的一端均与负载的输出端连接，参考电阻(R1)的另一端同时连接驱动电路的一输入端(1)以及控制电路的输出端，测流电阻(R2)的另一端连接驱动电路的另一输入端(2)，驱动电路的输出端与负载的驱动输入端连接，负载的电源输入端与输入电源(Vcc)连接，控制电路的一输入端(1)输入控制电压信号(Vc)，控制电路的另一输入端(2)与配置电阻(R3)的一端连接，配置电阻(R3)的另一端接地；配置电阻(R3)为可调电阻；负载为插拔式LED负载。该控制器实现了准确测流反馈功能，可应用于不同的负载应用，提高了LED驱动控制器的通用性、安全性和可靠性，降低了成本。

Description

一种万能LED驱动控制器 技术领域
本发明涉及LED照明设备驱动电路技术领域，尤其涉及一种万能LED驱动控制器。
背景技术
LED驱动是指将电源供应(例如高压工频交流即市电，低压高频交流如电子变压器的输出等)转换为特定的电压电流以驱动LED照明设备或器件发光工作的转换器，也即是说，将电源供应通过诸如变压器等器件转换为适用于照明设备或器件工作的额定功率。为了保证LED驱动的安全使用，一般针对LED驱动配置控制电路，控制电路根据相应的测流反馈结果控制LED驱动(即LED驱动电路，简称驱动电路)。传统的控制电路，一方面仅仅根据参考电阻和测流电阻的比较输出结果控制驱动电路，此种结构电压波动大，精度不稳定，极易导致控制电路输出误差较大进而驱动电路工作不正常，此外参考电阻一般配合使用恒流源，利用不同型号不同器件(例如三极管)构成的恒流源，由于其参数的不同(例如基极电压是一个非固定值)，即使是相同型号相同器件，在制作工艺上也有一定的个体差异，因此在不同的工作电流下，其电压会有一定的波动，因此不适合精密的恒流需求，并且由此可以得知恒流源的使用导致这种电路结构不能应用于不同的LED负载应用；另一方面传统的控制电路通常只能适用于某一型号或参数的LED负载应用，对应的电压范围(调光范围)等适用性指标非常狭窄，不利于LED驱动的通用性，以及降低设计开发成本的目标的发展；或者采用可插拔式LED负载配合可插拔式测流电阻的结构，尽管可以实现适用于多种型号或参数的LED负载应用的目标，但是由于可插拔式测流电阻的接头(或插头)管脚引入的等效电阻对测流电阻的影响不可忽略，且影响极大即极易导致控制电路输出误差较大进而导致驱动电路工作不正常，因此很难同时满足LED驱动的通用性、安全性和可靠性要求。
发明内容
本发明针对现有的LED驱动的控制电路不能应用不同的LED负载范围，并且现有的控制电路通用性差或不能同时满足通用性和安全可靠性能要求，因此导致重复设计成本较高的问题，提出了一种万能LED驱动控制器，该控制器通过配置电阻以及特定多路输入的控制电路的合理配置，在实现准确测流反馈功能的同时，可应用于不同的负载应用，提高了LED驱动控制器的通用性，同时满足安全性和可靠性要求，降低了设计周期和成本。
本发明的技术方案如下：
一种万能LED驱动控制器，包括参考电阻、测流电阻和负载，其特征在于，还包括驱动 电路、控制电路和配置电阻，所述驱动电路至少具有两个输入端和一个输出端，所述控制电路至少具有两个输入端和一个输出端，所述参考电阻的一端以及测流电阻的一端均与负载的输出端连接，参考电阻的另一端同时连接驱动电路的一输入端以及控制电路的输出端，测流电阻的另一端连接驱动电路的另一输入端以及驱动电路的输出端，所述负载的电源输入端与输入电源连接，所述控制电路的一输入端输入控制电压信号，所述控制电路的另一输入端与配置电阻的一端连接，所述配置电阻的另一端接地；所述配置电阻为可调电阻；所述负载为插拔式LED负载。
所述配置电阻为插拔式可调电阻或旋钮式可调电阻，所述插拔式LED负载为插拔式LED灯。
所述配置电阻采用两个以上插拔式可调电阻或旋钮式可调电阻，两个以上插拔式可调电阻或旋钮式可调电阻并联连接后的一端连接控制电路的输入端，并联连接后的另一端接地。
所述控制电路包括跟随器和三极管，所述跟随器的一输入端为控制电路的一输入端输入控制电压信号，所述跟随器的另一输入端为控制电路的另一输入端同时连接配置电阻的一端以及三极管的发射极，所述跟随器的输出端连接三极管的基极，所述三极管的集电极为控制电路的输出端。
所述跟随器为电压跟随器；所述三极管为NPN型三极管。
所述驱动电路包括比较器和功率三极管，所述比较器的一输入端为驱动电路的一输入端，所述比较器的另一输入端为驱动电路的另一输入端，所述比较器的输出端连接功率三极管的输入端，所述功率三极管的输出端为驱动电路的输出端。
所述驱动电路包括运算放大器和功率三极管，所述运算放大器的一输入端为驱动电路的一输入端，所述运算放大器的另一输入端为驱动电路的另一输入端，所述运算放大器的输出端连接功率三极管的输入端，所述功率三极管的输出端为驱动电路的输出端。
所述控制电压信号中的控制电压范围为0-10V。
所述配置电阻取值范围为50Ω-500kΩ。
所述配置电阻取值保持其分压为1V。
本发明的技术效果如下：
本发明涉及一种万能LED驱动控制器，包括具有特定多路输入的驱动电路、特定多路输入的控制电路和阻值可调的配置电阻配合插拔式LED负载，各部件具有特定连接并相互配合工作，通过选取配置电阻以及配合多输入的控制电路，利用参考电阻和测流电阻监控驱动负载电流以实现准确测流反馈功能，驱动电路根据参考电阻和测流电阻将参考电流和检测电流由电流转换为电压的输入比较判断驱动负载电流状态并输出驱动电压信号驱动负载(本发明 提出的驱动控制器实际上是将测流电阻和负载即LED负载作为负载整体一起驱动)，控制电路通过自身各输入端得到的控制电压信号和配置电阻的LED分压信号等生成调整电流信号，该调整电流信号进一步配合参考电阻生成可调整(或者说是可控调光)的参考电流输入至驱动电路以驱动负载(即上述负载整体)，实现LED驱动精度和可靠性，该结构实现的LED驱动控制器通过配置电阻以及配合的控制电路实现稳定的定流电压，无需使用恒流源，避免了现有控制器由于采用恒流源导致的不同型号不同器件导致的参数不同进而引起电压波动以及精度不稳定的问题，同时还避免了现有技术采用可插拔式侧流电阻由于接头管脚引入等效电阻导致的误差；此外，适应于不同应用场合的控制电压即不同LED照明发光需求的调光电压范围结合插拔式LED负载和阻值可调的配置电阻配置，实现了本发明LED驱动控制器可以应用于不同的负载应用，同时还提高了LED驱动控制器的可靠性和通用性，并且避免了不同应用需求重复设计开发的问题，降低了设计周期和成本。
本发明万能LED驱动控制器中控制电路可以采用跟随器(优选电压跟随器)和三极管配合输入的控制电压信号构成了一个可以称为信号调压器的电路结构以进一步控制驱动电路驱动负载(即上述负载整体)；驱动电路可以采用比较器(或运算放大器)和功率三极管，比较器(或运算放大器)的输出端连接功率三极管的输入端，功率三极管的输出端即为驱动电路的输出端以控制驱动负载(即上述负载整体)；此外配置电阻采用两个以上的插拔式可调电阻或旋钮式可调电阻并联连接的结构以实现最大驱动电流驱动负载。
附图说明
图1为本发明万能LED驱动控制器的结构示意图。
图2为本发明万能LED驱动控制器的一种优选结构示意图。
具体实施方式
下面结合附图对本发明进行说明。
本发明涉及一种万能LED驱动控制器，其结构示意图如图1所示，包括参考电阻R1、测流电阻R2、配置电阻R3、驱动电路、控制电路和负载，该实施例的驱动电路具有两个输入端和一个输出端，如图1中所示的驱动电路的第一输入端1、驱动电路的第二输入端2和驱动电路的输出端，控制电路具有两个输入端和一个输出端，如图1中所示的控制电路的第一输入端1、控制电路的第二输入端2和控制电路的输出端，其中，参考电阻R1的一端以及测流电阻R2的一端均与负载的输出端连接，参考电阻R1的另一端同时连接驱动电路的第一输入端1以及控制电路的输出端，测流电阻R2的另一端连接驱动电路的第二输入端2以及驱动 电路的输出端，负载的电源输入端与输入电源Vcc连接，控制电路的第一输入端1输入控制电压信号(或者说是连接控制电压Vc)，控制电路的第二输入端2与配置电阻R3的一端连接，配置电阻R3的另一端接地；配置电阻R3为阻值可调的电阻，即可调电阻，其可优选为插拔式可调电阻或旋钮式可调电阻，当采用插拔式可调电阻时具有可以插拔的接头或插头，或具有插拔式接线端子，以便于实现不同型号参数的配置电阻R3的更换以及实现即插即用；负载可以为插拔式LED负载，优选可以为插拔式LED灯，即LED负载具有可以插拔的接头或插头，或具有插拔式接线端子，以便于实现不同型号参数的LED负载的更换以及实现即插即用。该电路不再使用恒流源，而是通过选取配置电阻R3以及配合多输入的控制电路(本实施例中的控制电路具有两输入)实现稳定的定流电压，同样利用参考电阻R1和测流电阻R2监控比较其各自其上两路电流以实现准确测流反馈功能；此外结合可以适应于不同应用场合的控制电压Vc(也可以说是LED负载照明发光需求的调光电压)范围调控，以及阻值可调的配置电阻R3和可插拔式的负载器件，实现了该控制器可以应用于不同的LED负载要求，提高了控制器的通用性和可靠性，降低了设计周期和成本。
优选地，上述控制电压信号(或者成为调光电压信号)中的控制电压Vc的范围可以为0-10V；配置电阻R3的取值可以选取为保持其分压为1V，或配置电阻R3的取值范围可以为50Ω-500kΩ；此外，配置电阻优选可以采用两个以上的插拔式可调电阻(或旋钮式可调电阻)并联连接的结构，即两个以上的插拔式可调电阻(或旋钮式可调电阻)并联连接后的一端连接控制电路的第二输入端，两个以上的插拔式可调电阻(或旋钮式可调电阻)并联连接后的另一端接地，可以进一步通过采用并联接入电阻的方式调节配置电阻的总电阻值，则意味着进一步调节配置电阻R3上的电流，即意味着进一步调节控制电路的第二输入端的输入电流(或输入电压)，进而通过控制电路控制驱动电路以驱动LED负载，例如，假设配置电阻R3采用的插拔式可调电阻的取值为100kΩ，保持其分压为1V，则一个插拔式可调电阻其上的电流为10μA，若并联连接十个插拔式可调电阻，则可得到共100μA的最大总输入电流，进一步配合例如0-10V的控制电压信号(Vc)输入以实现最大驱动电流驱动的0～100％的LED负载调光。
图2为本发明万能LED驱动控制器的一种优选结构示意图，如图2所示，包括参考电阻R1、测流电阻R2、配置电阻R3、驱动电路、控制电路和负载，该实施例的驱动电路具有两个输入端和一个输出端，即驱动电路的第一输入端1、驱动电路的第二输入端2和驱动电路的输出端，控制电路具有两个输入端和一个输出端，即控制电路的第一输入端1、控制电路的第二输入端2和控制电路的输出端，其中，控制电路包括跟随器(可以是电压跟随器或电流跟随器，图2中所示的实施例可以采用电压跟随器)和三极管(可以是NPN型三极管或PNP 型三极管，图2中所示的实施例采用的为NPN型三极管)，跟随器的一输入端(例如“+”输入端)为控制电路的第一输入端1输入控制电压信号，跟随器的另一输入端(例如“-”输入端)为控制电路的第二输入端2同时连接配置电阻R3的一端以及三极管的发射极，跟随器的输出端连接三极管的基极，三极管的集电极为控制电路的输出端；驱动电路包括比较器(也可以采用运算放大器，图2中所示的实施例采用的为比较器和功率三极管，比较器的一输入端(例如反相输入端)为驱动电路的第一输入端1，比较器的另一输入端(例如同相输入端)为驱动电路的第二输入端2，比较器的输出端连接功率三极管的输入端，功率三极管的输出端为驱动电路的输出端；当然，图2所示实施例中的比较器也可以替换为运算放大器，此时驱动电路包括运算放大器和功率三极管，运算放大器的一输入端为第一输入端1，运算放大器的另一输入端为驱动电路的第二输入端2，运算放大器的输出端连接功率三极管的输入端，功率三极管的输出端为驱动电路的输出端。参考电阻R1的一端以及测流电阻R2的一端均与负载的输出端连接，参考电阻R1的另一端同时连接驱动电路中的比较器的反相输入端以及控制电路中的三极管的集电极，测流电阻R2的另一端连接驱动电路中的比较器的同相输入端以及功率三极管的输出端，比较器的输出端连接功率三极管的输入端，负载的电源输入端与输入电源Vcc连接，控制电路中的跟随器的“+”输入端输入控制电压信号(或者说是连接控制电压Vc)，控制电路中的“-”输入端与配置电阻R3的一端连接，配置电阻R3的另一端接地；配置电阻R3可以优选为插拔式可调电阻，即配置电阻R3具有可以插拔的接头或插头，或具有插拔式接线端子，以便于实现不同型号参数的配置电阻R3的更换以及实现即插即用；负载可以为插拔式LED负载，优选可以为插拔式LED灯，即LED负载具有可以插拔的接头或插头，或具有插拔式接线端子，以便于实现不同型号参数的LED负载的更换以及实现即插即用。优选地，上述控制电压信号中的控制电压Vc的范围可以为0-10V；配置电阻R3的取值可以选取为保持其分压为1V，或配置电阻R3的取值范围可以为50Ω-500kΩ。
本发明涉及的万能LED驱动控制器的工作原理说明如下：
当LED驱动正常工作时，LED驱动控制器通过如图1和图2所示的参考电阻R1和测流电阻R2将参考电流和检测电流由电流转换为电压，具体为，通过参考电阻R1将参考电流转换为参考电压(也可称为限流电压)，通过测流电阻R2将检测电流转换的测流电压(也可称为检测电压)，进而通过如图2所示的比较器(也可以是运算放大器)比较上述两个电压值(即参考电压和测流电压)大小，判断出检测电流(即相当于测流电压)是否高于参考电流(即相当于限流电压)，即相对于参考电流而言，检测电流是否在合理的安全值范围内。如图2所示，例如，比较器的两个输入端：测流电阻R2连接的同相输入端(一般标识为“+”输入端)及参考电阻R1连接的反相输入端(一般标识为“-”输入端)，当同相输入端输入电压>反相 输入端输入电压时，比较器输出高电平；当同相输入端输入电压<反相输入端输入电压时，比较器输出低电平。根据比较器输出电平的高低便可判断此时驱动负载电流状态，即检测电流(即相当于测流电压)是否高于参考电流(即相当于限流电压)，即相对于参考电流而言，检测电流是否在合理的安全值范围内。进而比较器根据各输入端得到的数据判断驱动负载电流状态并输出电平至如图2所示的功率三极管以驱动负载(本实施例中的驱动控制器是将测流电阻R2和负载即LED负载作为负载整体一起驱动，具体来说即通过功率三极管驱动改变测流电阻R2和负载即LED负载支路上的电流以驱动负载即LED负载)；控制电路中的跟随器(优选为电压跟随器)根据其同相输入端(一般标识为“+”输入端)得到的控制电压信号(即Vc值，也可以说是调光电压信号)以及反向输入端(一般标识为“-”输入端)得到的配置电阻R3分压数值信号生成调整电流信号，该调整电流信号通过如图2所示的NPN型三极管同时输入至如图2所示的比较器的反相输入端即参考电阻R1连接端，以进一步配合参考电阻R1生成可调整(或者说是可控调光)的参考电流输入至驱动电路以驱动负载(即上述负载整体)，此时如图2所示的NPN型三极管的集电极电流近似等于发射极电流，即Ic＝Ie(由于β值较大，误差可以忽略不计)；也即是说，上述控制电路中的跟随器和三极管配合输入调光电压信号构成了一个可以称为信号调压器的电路结构以进一步控制驱动电路驱动负载。
此外，本发明提出的万能LED驱动控制器采用如插拔式可调电阻等阻值可调的配置电阻R3和可插拔式LED负载配置结构，避免了现有技术中单一配置导致仅能适用于单一型号参数LED负载的缺陷，同时避免了现有技术采用可插拔式测流电阻和可插拔式LED负载配置的结构，可插拔式测流电阻的接头或插头引入等效电阻不可忽略不计，极易导致检测结果异常，进而造成控制驱动功能异常的缺陷，本发明采用可插拔式配置电阻R3，其头或插头引入等效电阻(约几个～几十个μΩ)，相对于几个Ω～几百个kΩ的配置电阻R3来说可以忽略不计，不会对控制器造成较大影响，因此本发明的控制器在实现了应用于不同的LED负载要求的“万能/万用”功能的同时，配合控制器中的其它器件，兼具实现了准确测流反馈功能，即提高了LED驱动控制器的通用性，同时满足安全性和可靠性要求。
应当指出，以上所述具体实施方式可以使本领域的技术人员更全面地理解本发明创造，但不以任何方式限制本发明创造。因此，尽管本说明书参照附图和实施例对本发明创造已进行了详细的说明，但是，本领域技术人员应当理解，仍然可以对本发明创造进行修改或者等同替换，总之，一切不脱离本发明创造的精神和范围的技术方案及其改进，其均应涵盖在本发明创造专利的保护范围当中。

Claims (10)

  1. 一种万能LED驱动控制器，包括参考电阻、测流电阻和负载，其特征在于，还包括驱动电路、控制电路和配置电阻，所述驱动电路至少具有两个输入端和一个输出端，所述控制电路至少具有两个输入端和一个输出端，所述参考电阻的一端以及测流电阻的一端均与负载的输出端连接，参考电阻的另一端同时连接驱动电路的一输入端以及控制电路的输出端，测流电阻的另一端连接驱动电路的另一输入端以及驱动电路的输出端，所述负载的电源输入端与输入电源连接，所述控制电路的一输入端输入控制电压信号，所述控制电路的另一输入端与配置电阻的一端连接，所述配置电阻的另一端接地；所述配置电阻为可调电阻；所述负载为插拔式LED负载。
  2. 根据权利要求1所述的万能LED驱动控制器，其特征在于，所述配置电阻为插拔式可调电阻或旋钮式可调电阻，所述插拔式LED负载为插拔式LED灯。
  3. 根据权利要求1或2所述的万能LED驱动控制器，其特征在于，所述配置电阻采用两个以上插拔式可调电阻或旋钮式可调电阻，两个以上插拔式可调电阻或旋钮式可调电阻并联连接后的一端连接控制电路的输入端，并联连接后的另一端接地。
  4. 根据权利要求1至3之一所述的万能LED驱动控制器，其特征在于，所述控制电路包括跟随器和三极管，所述跟随器的一输入端为控制电路的一输入端输入控制电压信号，所述跟随器的另一输入端为控制电路的另一输入端同时连接配置电阻的一端以及三极管的发射极，所述跟随器的输出端连接三极管的基极，所述三极管的集电极为控制电路的输出端。
  5. 根据权利要求4所述的万能LED驱动控制器，其特征在于，所述跟随器为电压跟随器；所述三极管为NPN型三极管。
  6. 根据权利要求1至3之一所述的万能LED驱动控制器，其特征在于，所述驱动电路包括比较器和功率三极管，所述比较器的一输入端为驱动电路的一输入端，所述比较器的另一输入端为驱动电路的另一输入端，所述比较器的输出端连接功率三极管的输入端，所述功率三极管的输出端为驱动电路的输出端。
  7. 根据权利要求1至3之一所述的万能LED驱动控制器，其特征在于，所述驱动电路包括运算放大器和功率三极管，所述运算放大器的一输入端为驱动电路的一输入端，所述运算放大器的另一输入端为驱动电路的另一输入端，所述运算放大器的输出端连接功率三极管的输入端，所述功率三极管的输出端为驱动电路的输出端。
  8. 根据权利要求1或2所述的万能LED驱动控制器，其特征在于，所述控制电压信号中的控制电压范围为0-10V。
  9. 根据权利要求8所述的万能LED驱动控制器，其特征在于，所述配置电阻取值范围为50Ω-500kΩ。
  10. 根据权利要求8所述的万能LED驱动控制器，其特征在于，所述配置电阻取值保持其分压为1V。
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