技术领域technical field
本实用新型属于LED驱动技术领域，具体涉及一种高功率因数高压无频闪LED线性驱动电路。The utility model belongs to the technical field of LED driving, and in particular relates to a linear driving circuit for a high-power-factor, high-voltage, flicker-free LED.
背景技术Background technique
LED作为一种高效的新光源，由于具有寿命长，能耗低，节能环保，正广泛应用于各领域照明。LED的点亮需要驱动电路进行驱动。As an efficient new light source, LED is widely used in lighting in various fields due to its long life, low energy consumption, energy saving and environmental protection. The lighting of the LED requires a driving circuit to drive it.
由于LED的负载特性导致，传统线性LED驱动电路无法在实现在维持系统较高的功率因数下同时实现无频闪的特点。Due to the load characteristics of the LED, the traditional linear LED drive circuit cannot realize the characteristics of flicker-free while maintaining a high power factor of the system.
实用新型内容Utility model content
为了解决上述技术问题，本实用新型提出了一种高功率因数高压无频闪LED线性驱动电路。In order to solve the above-mentioned technical problems, the utility model proposes a high-power factor high-voltage flicker-free LED linear drive circuit.
为了达到上述目的，本实用新型的技术方案如下：In order to achieve the above object, the technical scheme of the utility model is as follows:
一种高功率因数高压无频闪LED线性驱动电路，包括：A high power factor high-voltage flicker-free LED linear drive circuit, including:
负载电路，包括一个或多个串联的LED；A load circuit comprising one or more LEDs connected in series;
电压源，用于为LED供电；A voltage source for powering the LEDs;
第一电流限制电路，其与负载电路串联，形成串联模块，第一电流限制电路用于控制流过负载电路的电流恒流；The first current limiting circuit is connected in series with the load circuit to form a series module, and the first current limiting circuit is used to control the constant current flowing through the load circuit;
储能电路，其与一个或多个并联设置的串联模块并联，形成并联模块，储能电路用于储存电量；An energy storage circuit, which is connected in parallel with one or more series modules arranged in parallel to form a parallel module, and the energy storage circuit is used to store electric power;
第二电流限制电路，其与并联模块串联，第二电流限制电路用于控制流过并联模块的电流恒流及用于控制系统总能量传输；A second current limiting circuit, which is connected in series with the parallel module, and the second current limiting circuit is used to control the constant current flowing through the parallel module and to control the total energy transmission of the system;
当电压源输入电压较低时，储能电路放电，为负载电路供电；When the input voltage of the voltage source is low, the energy storage circuit discharges to supply power to the load circuit;
当电压源输入电压较高时，电压源对负载电路供电，并对储能电路充电，第二电流限制电路控制流过并联模块的电流恒流，并限制总体的输入能量。When the input voltage of the voltage source is high, the voltage source supplies power to the load circuit and charges the energy storage circuit, and the second current limiting circuit controls the constant current flowing through the parallel modules and limits the overall input energy.
本实用新型一种高功率因数高压无频闪LED线性驱动电路通过与负载电路串联的第一电流限制电路控制流过负载电路的电流恒流，且通过与之并联的储能电路储存电量。当输入电压较低时，储能电路放电，为负载电路供电，从而达到无频闪效果。当输入电压较高时，输入电压对负载电路供电，并对储能电路充电。与并联模块串联的第二电流限制电路控制流过并联模块的电流恒流，，并限制总体的输入能量，从而达到高功率因数效果。本实用新型可以实现在维持系统较高的功率因数的前提下同时实现LED无频闪的特点，达到无纹波特性，实现完美的系统特性。The utility model relates to a high-power-factor, high-voltage, flicker-free LED linear drive circuit that controls the constant current flowing through the load circuit through a first current limiting circuit connected in series with the load circuit, and stores electricity through an energy storage circuit connected in parallel therewith. When the input voltage is low, the energy storage circuit discharges to supply power to the load circuit, thereby achieving a flicker-free effect. When the input voltage is high, the input voltage supplies power to the load circuit and charges the energy storage circuit. The second current limiting circuit connected in series with the parallel modules controls the constant current flowing through the parallel modules, and limits the overall input energy, so as to achieve high power factor effect. The utility model can realize the feature of no flicker of LED at the same time on the premise of maintaining a high power factor of the system, achieve the feature of no ripple, and realize the perfect system feature.
在上述技术方案的基础上，还可做如下改进：On the basis of the above-mentioned technical scheme, the following improvements can also be made:
作为优选的方案，第一电流限制电路包括：串联设置的恒流源I1和电阻R1。As a preferred solution, the first current limiting circuit includes: a constant current source I1 and a resistor R1 arranged in series.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，电压源包括：V+端和V-端，恒流源I1通过负载电路与V+端连接，电阻R1通过第二电流限制电路与V-端连接。As a preferred solution, the voltage source includes: a V+ terminal and a V- terminal, the constant current source I1 is connected to the V+ terminal through a load circuit, and the resistor R1 is connected to the V- terminal through a second current limiting circuit.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，恒流源I1包括：放大器和功率管。As a preferred solution, the constant current source I1 includes: an amplifier and a power tube.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，第一电流限制电路的功率管为NMOS晶体管MN101；As a preferred solution, the power transistor of the first current limiting circuit is an NMOS transistor MN101;
放大器的正向输入端与基准电压Vref1连接，其反向输入端分别与电阻R1和MN101的源极连接，且其输出端与MN101的栅极连接；The positive input terminal of the amplifier is connected to the reference voltage Vref1, its negative input terminal is respectively connected to the source of resistor R1 and MN101, and its output terminal is connected to the gate of MN101;
MN101的源极分别与放大器的反向输入端和电阻R1连接，其栅极与放大器的输出端连接，且其漏极与负载电路连接；The source of MN101 is respectively connected to the reverse input terminal of the amplifier and resistor R1, its gate is connected to the output terminal of the amplifier, and its drain is connected to the load circuit;
电阻R1的一端分别与放大器的反向输入端和MN101的源极连接，其另一端分别与储能电路和第二电流限制电路连接。One end of the resistor R1 is respectively connected to the inverting input end of the amplifier and the source of the MN101, and the other end is respectively connected to the energy storage circuit and the second current limiting circuit.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，第二电流限制电路包括：串联设置的恒流源I2 和电阻R2。As a preferred solution, the second current limiting circuit includes: a constant current source I2 and a resistor R2 arranged in series.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，电压源包括：V+端和V-端，恒流源I2通过并联模块与V+端连接，电阻R2与V-端连接。As a preferred solution, the voltage source includes: a V+ terminal and a V- terminal, the constant current source I2 is connected to the V+ terminal through a parallel module, and the resistor R2 is connected to the V- terminal.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，恒流源I2包括：放大器和功率管。As an optimal solution, the constant current source I2 includes: an amplifier and a power tube.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，第二电流限制电路的功率管为NMOS晶体管MN102；As a preferred solution, the power transistor of the second current limiting circuit is an NMOS transistor MN102;
放大器的正向输入端与基准电压Vref2连接，其反向输入端分别与电阻R2和MN102的源极连接，且其输出端与MN102的栅极连接；The positive input terminal of the amplifier is connected to the reference voltage Vref2, its negative input terminal is respectively connected to the source of resistor R2 and MN102, and its output terminal is connected to the gate of MN102;
MN102的源极分别与放大器的反向输入端和电阻R2连接，其栅极与放大器的输出端连接，且其漏极与并联模块连接；The source of MN102 is respectively connected to the reverse input terminal of the amplifier and the resistor R2, its gate is connected to the output terminal of the amplifier, and its drain is connected to the parallel module;
电阻R2的一端分别与放大器的反向输入端和MN102的源极连接，其另一端与电压源V-端连接。One end of the resistor R2 is respectively connected to the inverting input end of the amplifier and the source of the MN102, and the other end is connected to the V- end of the voltage source.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
作为优选的方案，储能电路包括一个或多个并联设置的电容C。As a preferred solution, the energy storage circuit includes one or more capacitors C arranged in parallel.
采用上述优选的方案，电路简单，成本低，采用多个并联设置的电容C，其储能电路的储电量更大。By adopting the above preferred solution, the circuit is simple and the cost is low, and a plurality of parallel capacitors C are used, and the energy storage circuit of the energy storage circuit has a larger storage capacity.
附图说明Description of drawings
图1为本实用新型实施例提供的一种高功率因数高压无频闪LED线性驱动电路的结构框图之一。FIG. 1 is one of the structural block diagrams of a high power factor high-voltage flicker-free LED linear drive circuit provided by an embodiment of the present invention.
图2为本实用新型实施例提供的一种高功率因数高压无频闪LED线性驱动电路的电路图之一。Fig. 2 is one of the circuit diagrams of a high power factor high voltage flicker-free LED linear drive circuit provided by the embodiment of the present invention.
图3为本实用新型实施例提供的一种高功率因数高压无频闪LED线性驱动电路的电路图之二。Fig. 3 is the second circuit diagram of a high power factor high voltage flicker-free LED linear drive circuit provided by the embodiment of the present invention.
图4为本实用新型实施例提供的一种高功率因数高压无频闪LED 线性驱动电路的结构框图之二。Fig. 4 is the second structural block diagram of a high-power-factor high-voltage high-voltage flicker-free LED linear drive circuit provided by an embodiment of the present invention.
其中：1、负载电路，2、电压源，3、第一电流限制电路，4、储能电路，5、第二电流限制电路，6、串联模块，7并联模块。Among them: 1. Load circuit, 2. Voltage source, 3. First current limiting circuit, 4. Energy storage circuit, 5. Second current limiting circuit, 6. Series modules, 7. Parallel modules.
具体实施方式Detailed ways
下面结合附图详细说明本实用新型的优选实施方式。Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.
为了达到本实用新型的目的，一种高功率因数高压无频闪LED线性驱动电路的其中一些实施例中，如图1所示，一种高功率因数高压无频闪LED线性驱动电路包括：In order to achieve the purpose of this utility model, in some embodiments of a high-power factor high-voltage flicker-free LED linear drive circuit, as shown in Figure 1, a high-power factor high-voltage high-voltage flicker-free LED linear drive circuit includes:
负载电路1，包括多个串联的LED；A load circuit 1, including a plurality of LEDs connected in series;
电压源2，用于为LED供电；Voltage source 2 for powering the LEDs;
第一电流限制电路3，其与负载电路1串联，形成串联模块6，第一电流限制电路3用于控制流过负载电路1的电流恒流；The first current limiting circuit 3 is connected in series with the load circuit 1 to form a series module 6, the first current limiting circuit 3 is used to control the constant current flowing through the load circuit 1;
储能电路4，其与一个串联模块6并联，形成并联模块7，储能电路4用于储存电量；An energy storage circuit 4, which is connected in parallel with a series module 6 to form a parallel module 7, and the energy storage circuit 4 is used for storing electricity;
第二电流限制电路5，其与并联模块7串联，第二电流限制电路5用于控制流过并联模块7的电流恒流及用于控制系统总能量传输；The second current limiting circuit 5 is connected in series with the parallel module 7, and the second current limiting circuit 5 is used to control the constant current flowing through the parallel module 7 and to control the total energy transmission of the system;
当电压源2输入电压较低时，储能电路4放电，为负载电路1供电；When the input voltage of the voltage source 2 is low, the energy storage circuit 4 discharges to supply power to the load circuit 1;
当电压源2输入电压较高时，电压源2对负载电路1供电，并对储能电路4充电，第二电流限制电路5控制流过并联模块7的电流恒流，并限制总体的输入能量。When the input voltage of the voltage source 2 is high, the voltage source 2 supplies power to the load circuit 1 and charges the energy storage circuit 4, and the second current limiting circuit 5 controls the constant current flowing through the parallel module 7 and limits the overall input energy .
储能电路4为一电容C。The energy storage circuit 4 is a capacitor C.
本实用新型一种高功率因数高压无频闪LED线性驱动电路通过与负载电路1串联的第一电流限制电路3控制流过负载电路1的电流恒流，且通过与之并联的电容C储存电量。当输入电压较低时，电容C放电，为负载电路1供电。从而达到无频闪效果。当输入电压较高时，输入电压对LED供电，并对电容C充电。与并联模块7串联的第二电流限制电路5对并联模块7的电流恒流一并限制系统总体的输入能量，从而达到高功率因数的效果。The utility model is a high-power factor high-voltage non-stroboscopic LED linear drive circuit that controls the constant current flowing through the load circuit 1 through the first current limiting circuit 3 connected in series with the load circuit 1, and stores electricity through the capacitor C connected in parallel with it. . When the input voltage is low, the capacitor C discharges to supply power to the load circuit 1 . So as to achieve no flicker effect. When the input voltage is high, the input voltage supplies power to the LED and charges the capacitor C. The second current limiting circuit 5 connected in series with the parallel module 7 controls the current constant of the parallel module 7 and limits the overall input energy of the system, so as to achieve a high power factor effect.
本实用新型电路结构简单，成本低，其可以实现在维持系统较高的功率因数的前提下同时实现LED无频闪的特点，达到无纹波的特性，实现完美的系统特性。The circuit structure of the utility model is simple and the cost is low, and it can realize the feature of no flicker of the LED at the same time under the premise of maintaining a high power factor of the system, achieve the feature of no ripple, and realize perfect system features.
如图2所示，为了进一步地优化本实用新型的实施效果，在另外一些实施方式中，其余特征技术相同，不同之处在于，第一电流限制电路3包括：串联设置的恒流源I1和电阻R1。As shown in Figure 2, in order to further optimize the implementation effect of the present utility model, in other embodiments, the rest of the characteristic techniques are the same, the difference is that the first current limiting circuit 3 includes: a constant current source I1 and Resistor R1.
电压源2包括：V+端和V-端，恒流源I1通过负载电路1与V+端连接，电阻R1通过第二电流限制电路5与V-端连接。The voltage source 2 includes: a V+ terminal and a V- terminal, the constant current source I1 is connected to the V+ terminal through the load circuit 1 , and the resistor R1 is connected to the V- terminal through the second current limiting circuit 5 .
如图3所示，进一步，恒流源I1包括：放大器和功率管，且第一电流限制电路3的功率管为NMOS晶体管MN101；As shown in FIG. 3 , further, the constant current source I1 includes: an amplifier and a power transistor, and the power transistor of the first current limiting circuit 3 is an NMOS transistor MN101;
放大器的正向输入端与基准电压Vref1连接，其反向输入端分别与电阻R1和MN101的源极连接，且其输出端与MN101的栅极连接；The positive input terminal of the amplifier is connected to the reference voltage Vref1, its negative input terminal is respectively connected to the source of resistor R1 and MN101, and its output terminal is connected to the gate of MN101;
MN101的源极分别与放大器的反向输入端和电阻R1连接，其栅极与放大器的输出端连接，且其漏极与负载电路1连接；The source of MN101 is respectively connected to the inverting input terminal of the amplifier and the resistor R1, its gate is connected to the output terminal of the amplifier, and its drain is connected to the load circuit 1;
电阻R1的一端分别与放大器的反向输入端和MN101的源极连接，其另一端分别与储能电路4和第二电流限制电路5连接。One end of the resistor R1 is respectively connected to the inverting input end of the amplifier and the source of the MN101 , and the other end is connected to the energy storage circuit 4 and the second current limiting circuit 5 respectively.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
如图2所示，为了进一步地优化本实用新型的实施效果，在另外一些实施方式中，其余特征技术相同，不同之处在于，第二电流限制电路5包括：串联设置的恒流源I2和电阻R2。As shown in Figure 2, in order to further optimize the implementation effect of the present utility model, in some other embodiments, the rest of the characteristic techniques are the same, the difference is that the second current limiting circuit 5 includes: a constant current source I2 and Resistor R2.
电压源2包括：V+端和V-端，恒流源I2通过并联模块7与V+端连接，电阻R2与V-端连接。The voltage source 2 includes: a V+ terminal and a V- terminal, the constant current source I2 is connected to the V+ terminal through the parallel module 7, and the resistor R2 is connected to the V- terminal.
如图3所示，进一步，恒流源I2包括：放大器和功率管，且第二电流限制电路5的功率管为NMOS晶体管MN102；As shown in FIG. 3 , further, the constant current source I2 includes: an amplifier and a power transistor, and the power transistor of the second current limiting circuit 5 is an NMOS transistor MN102;
放大器的正向输入端与基准电压Vref2连接，其反向输入端分别与电阻R2和MN102的源极连接，且其输出端与MN102的栅极连接；The positive input terminal of the amplifier is connected to the reference voltage Vref2, its negative input terminal is respectively connected to the source of resistor R2 and MN102, and its output terminal is connected to the gate of MN102;
MN102的源极分别与放大器的反向输入端和电阻R2连接，其栅极与放大器的输出端连接，且其漏极与并联模块7连接；The source of MN102 is respectively connected to the reverse input terminal of the amplifier and the resistor R2, its gate is connected to the output terminal of the amplifier, and its drain is connected to the parallel module 7;
电阻R2的一端分别与放大器的反向输入端和MN102的源极连接，其另一端与电压源V-端连接。One end of the resistor R2 is respectively connected to the inverting input end of the amplifier and the source of the MN102, and the other end is connected to the V- end of the voltage source.
采用上述优选的方案，电路简单，成本低。By adopting the above preferred solution, the circuit is simple and the cost is low.
为了进一步地优化本实用新型的实施效果，在另外一些实施方式中，其余特征技术相同，不同之处在于，储能电路4包括多个并联设置的电容C。In order to further optimize the implementation effect of the present utility model, in other embodiments, the rest of the features are the same, the difference is that the energy storage circuit 4 includes a plurality of capacitors C arranged in parallel.
采用上述优选的方案，采用多个并联设置的电容C，其储能电路4的储电量更大。By adopting the above-mentioned preferred solution, a plurality of capacitors C arranged in parallel are used, and the storage capacity of the energy storage circuit 4 is larger.
如图4所示，为了进一步地优化本实用新型的实施效果，在另外一些实施方式中，其余特征技术相同，不同之处在于，储能电路4与两个并联设置的串联模块6并联，形成并联模块7。As shown in Figure 4, in order to further optimize the implementation effect of the present utility model, in some other embodiments, the remaining characteristic technologies are the same, the difference is that the energy storage circuit 4 is connected in parallel with two serial modules 6 arranged in parallel to form Parallel module 7.
采用上述优选的方案，适用范围更广。By adopting the above-mentioned preferred scheme, the scope of application is wider.
对于本实用新型的优选实施方式，应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出若干变形和改进，这些都属于本实用新型的保护范围。For the preferred implementation of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, some deformations and improvements can also be made, and these all belong to the scope of the present utility model. protected range.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721868022.5UCN207854228U (en) | 2017-12-27 | 2017-12-27 | A high power factor high voltage flicker-free LED linear drive circuit |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721868022.5UCN207854228U (en) | 2017-12-27 | 2017-12-27 | A high power factor high voltage flicker-free LED linear drive circuit |
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| CN207854228Utrue CN207854228U (en) | 2018-09-11 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721868022.5UExpired - Fee RelatedCN207854228U (en) | 2017-12-27 | 2017-12-27 | A high power factor high voltage flicker-free LED linear drive circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20180911 | |
| CF01 | Termination of patent right due to non-payment of annual fee |