WO2021169348A1 - 一种带智能感应的驱动电路 - Google Patents

一种带智能感应的驱动电路 Download PDF

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WO2021169348A1
WO2021169348A1 PCT/CN2020/124183 CN2020124183W WO2021169348A1 WO 2021169348 A1 WO2021169348 A1 WO 2021169348A1 CN 2020124183 W CN2020124183 W CN 2020124183W WO 2021169348 A1 WO2021169348 A1 WO 2021169348A1
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circuit
inductor
power supply
power
optocoupler
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PCT/CN2020/124183
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English (en)
French (fr)
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许剑钢
马位赣
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绍兴艾亿科照明电器有限公司
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Priority to DE212020000601.6U priority Critical patent/DE212020000601U1/de
Publication of WO2021169348A1 publication Critical patent/WO2021169348A1/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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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]
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings

Definitions

  • the invention relates to a driving circuit for lamps, in particular to a driving circuit with intelligent induction.
  • the existing lamps with induction function are basically designed separately from the driver and the sensor.
  • the signal sensed by the sensor is mainly converted into a 0-10V signal, and then the 0-10V signal is transmitted to the driver to control the drive.
  • the output adjust the brightness of the lamps and lanterns.
  • This kind of scheme has redundant design, waste of resources; and low work efficiency; at the same time, it cannot well meet the needs of supporting production of lamps.
  • the output of the existing sensor is controlled by a single-chip microcomputer.
  • the output of the single-chip microcomputer is a PWM waveform. Therefore, the PWM waveform needs to be converted into a 0-10V signal.
  • the 0-10V signal After the driver receives the 0-10V signal, the 0-10V signal needs to be converted into The PWM waveform is transmitted to the power control chip with PWM dimming interface through the optocoupler. In short, the signal has to be converted between the PWM waveform and the 0-10V river for many times. Obviously, there is a redundant design, which reduces the efficiency of the product and increases the risk of bad products.
  • the present invention provides a drive circuit with intelligent induction, which combines the drive and the sensor with each other, which can save the original intermediate module 9 and the conversion circuit of the module 10.
  • the cost has improved the performance of the product.
  • a drive circuit with intelligent induction including EMC devices, power conversion circuits, rectifier filter circuits, control circuits connected to the power conversion circuit, power supply module one for the control circuit, power supply module two for the inductor, and light
  • the coupling sensor also includes a MOS tube, the gate of the MOS tube is connected to the output pin of the sensor, and the drain of the MOS tube is connected to the anode of the optocoupler.
  • the senor can output a high level, a square wave, and a low level according to changes in external conditions.
  • the drain of the MOS transistor is connected to the second power supply line through a resistor on the other hand, and the source of the MOS transistor is grounded.
  • the cathode of the optocoupler is grounded; on the one hand, the collector of the optocoupler is connected to the control circuit, and on the other hand, it is connected to the power supply module one through a resistor and a diode in turn.
  • the chip of the control circuit is a power control chip with a PWM dimming interface.
  • the present invention directly utilizes the PWM signal output by the single-chip microcomputer inside the inductor after being isolated by an optocoupler, and then transmitted to the control circuit to realize the power adjustment of the power supply, and simultaneously realize the connection between the sensor circuit and the input end and the load end. Isolation, eliminating the need to convert the internal PWM signal of the inductor into a 0-10V signal, and the internal 0-10V signal of the power supply into a PWM signal, these two parts of the circuit. It is conducive to the stability and reliability of the dimming circuit, and realizes the isolation of the sensor dimming circuit, and has the characteristics of low cost and high reliability.
  • Figure 1 is a block diagram of a circuit module of a conventional lamp with sensing function
  • FIG. 2 is a block diagram of a module of a driving circuit with smart sensing according to this embodiment
  • FIG. 3 is a circuit diagram of the driving circuit with smart sensing according to this embodiment.
  • EMC device 1 power conversion circuit 2, rectifier filter circuit 3, VCC1 power supply circuit module 5 (power supply module one), and VCC2 power supply circuit module 6 (power supply module two) are conventional flyback power lines.
  • the utility power is rectified and filtered, and the lamps are turned on after AC-DC conversion.
  • the transformer winding in the figure is divided into a working winding and a power supply winding. After the excitation voltage of the primary winding of the flyback line working winding is turned off, the secondary winding The load provides power output, and the VCC1 and VCC2 power supply lines supply power for the control circuit and the inductor respectively.
  • the chip of the control circuit 4 needs to be a power control chip with a PWM dimming interface.
  • the SY5882 of Silica is taken as an example.
  • pin 8 is defined as PWM, which is described as when the duty cycle received by pin 8 drops to When the duty ratio is below 2.5%, the output current will be turned off; when the duty cycle rises above 5% to 90%, the output current will be output proportionally between 5.5% and 100%; when the duty cycle is between 90% and 100%, the output will be output. The current is 100%.
  • the output power can be controlled by adjusting the duty cycle of pin 8.
  • the sensor 7 is a device that outputs high level, square wave, and low level (respectively corresponding to bright light, dark light and no light) according to changes in external conditions. When a person approaches, it outputs a high level; after a person leaves Output PWM square wave with 30% duty cycle; after 1 minute, output low level.
  • the VCC2 power supply line outputs 12V DC to supply power to the sensor 7.
  • the output pin of the sensor 7 is connected to the gate of Q4 through R44, the source of Q4 is grounded, the drain of Q4 is connected to the 12V DC of the VCC2 power supply line through R34, and the photocoupler is connected through R33.
  • the anode of U3 and the cathode of optocoupler U3 are grounded; the collector of optocoupler U3 is connected to the VCC of the VCC1 power supply line through R24 and D8, and the collector of optocoupler U3 is connected to pin 8 of chip U2 through R43.
  • the MOS tube Q4 When the sensor outputs a high level, the MOS tube Q4 is turned on, the optocoupler is turned off, and pin 8 is at a high level, and the flyback circuit outputs 100% current, that is, the lamp is all on; when the sensor outputs a low level, the MOS tube Q4 is turned off .
  • the optocoupler is turned on, pin 8 is low, the flyback circuit turns off the output current, that is, the light goes out; when the sensor outputs a 30% duty cycle, the MOS transistor Q4 is turned on at a 30% duty cycle.
  • the optocoupler is cut off according to a 30% duty cycle, and pin 8 receives a 30% duty cycle to conduct, and the output current of the flyback circuit is 30%, that is, the lamp power is 30% of the full power.
  • the sensor signal is inverted by the MOS tube Q4 to realize the synchronous output with the chip U2 (due to the existence of the optocoupler, the signal logic is inverted, and Q4 is added to invert the signal logic again, so the positive logic can be obtained) .

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  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

本发明提供了一种带智能感应的驱动电路，涉及灯具驱动电路的技术领域，包括EMC器件、电源转换电路、整流滤波电路、与电源转换电路连接的控制电路、为控制电路供电的供电模块一、为感应器供电的供电模块二、以及光耦和感应器，还包括MOS管，MOS管的栅极与感应器的输出脚连接，MOS管的漏极与光耦的阳极连接。本发明直接利用感应器内部单片机输出的PWM信号通过光耦隔离后，传输给控制电路，实现电源的功率调整，并同时实现感应器线路和输入端和负载端的隔离，省去了感应器内部的PWM转换为0-10V信号，电源内部0-10V信号转换为PWM信号这两部分电路，有利于调光电路的稳定性和可靠性，实现感应器调光线路的隔离，具有低成本，高信赖的特点。

Description

一种带智能感应的驱动电路 技术领域
本发明涉及一种用于灯具的驱动电路，尤其涉及一种带智能感应的驱动电路。
背景技术
现有的带感应功能的灯具，基本都是将驱动和感应器分设计的，主要将感应器感应到的信号转变为0-10V信号，然后将0-10V信号传输给驱动，用来控制驱动的输出，调节灯具的亮暗。这种方案存在多余的设计，浪费资源；而且工作效率低；同时不能很好的适应灯具配套生产的需要。现有的感应器是通过单片机来控制输出，单片机的输出为PWM波形，因此需要将PWM波形转化为0-10V的信号，驱动接收到0-10V信号后，又需要将0-10V信号转化为PWM波形，再通过光耦传输给带有PWM调光接口的电源控制芯片。简而言之，信号要多次在PWM波形与0-10V之江相互转换，显然存在多余的设计，降低了产品的效率，增加了产品的不良风险。
基于此，做出本申请。
发明内容
为了解决现有技术中存在的上述缺陷，本发明提供了一种带智能感应的驱动电路，将驱动和感应器相互结合，可省去原有中间模块9和模块10的转换线路，既节约了成本，又提高了产品的性能。
为了实现上述目的，本发明采取的技术方案如下：
一种带智能感应的驱动电路，包括EMC器件、电源转换电路、整流滤波电路、与电源转换电路连接的控制电路、为控制电路供电的供电模块一、为感应器供电的供电模块二、以及光耦和感应器，还包括MOS管，MOS管的栅极与感应器的输出脚连接，MOS管的漏极与光耦的阳极连接。
进一步地，为了使灯光在不同场景下呈现不同的状态，所述感应器可依据外界条件变化，输出高电平、方波、低电平。
进一步地，所述MOS管的漏极另一方面通过一电阻连接供电线路二，MOS管的源极接地。
进一步地，所述光耦的阴极接地；光耦的集电极一方面连接控制电路，另一方面依次通过一电阻和二极管接供电模块一。
进一步地，所述控制电路的芯片为带PWM调光接口的电源控制芯片。
本发明的原理和有益技术效果：本发明直接利用感应器内部单片机输出的PWM信号通过光耦隔离后，传输给控制电路，实现电源的功率调整，并同时实现感应器线路和输入端和负载端的隔离，省去了感应器内部的PWM转换为0-10V信号，电源内部0-10V信号转换为PWM信号，这两部分电路。有利于调光电路的稳定性和可靠性，实现感应器调光线路的隔离，具有低成本，高信赖的特点。
附图说明
图1为现有的带感应功能的灯具的电路模块框图；
图2为本实施例带智能感应的驱动电路的模块框图；
图3为本实施例带智能感应的驱动电路的电路图。
具体实施方式
为了使本发明的技术手段及其所能达到的技术效果，能够更清楚更完善的披露，兹提供了以下实施例，并结合附图作如下详细说明：
EMC器件1，电源转换电路2，整流滤波电路3，VCC1供电电路模块5(供电模块一)，VCC2供电线路模块6(供电模块二)为常规的反激电源线路。将市电进行整流滤波，进行交直流转换后控制灯具点亮，图中的变压器绕组分为工作绕组和供电绕组，反激式线路工作绕组的初级线圈的激励电压关断后，次级线圈向负载提供功率输出，VCC1，VCC2供电线路分别为控制电路和感应器供电。
控制电路4的芯片需要为带PWM调光接口的电源控制芯片，本文中以矽力杰的SY5882为例，规格书中对8脚定义为PWM，描述为当8脚接收的占空比下降到2.5％以下时，关闭输出电流；当占空比上升到5％以上到90％时，输出电流在5.5％-100％之间等比例输出；当占空比在90％-100％时，输出电流为100％。依据芯片规格书对8脚的定义，只需调节8脚的占空比即可控制输出功率。
感应器7是一种依据外界条件变化，输出高电平、方波、低电平(分别对应亮光、暗光和无光)的装置，如人靠近的时候，输出高电平；人离开后输出30％占空比的PWM方波；过1分钟后，输出低电平。VCC2供电线路输出12V的直流电给感应器7供电，感应器7输出脚通过R44与Q4的栅极相连，Q4源极接地，Q4漏极通过R34接VCC2供电线路的12V直流电、通过R33接光耦U3的阳极，光耦U3阴极接地；光耦U3的集电极通过R24、D8接VCC1供电线路的VCC，光耦U3的集电极通过R43接芯片U2的8脚。
当感应器输出高电平时，MOS管Q4导通，光耦截止，8脚为高电平，反激电路输出100％电流，即灯全亮；当感应器输出低电平时，MOS管Q4截止。光耦导通，8脚为低电 平，反激电路关闭输出电流，即灭灯；当感应器输出30％的占空比时，MOS管Q4按照30％的占空比导通。光耦按照30％的占空比截止，8脚接收到30％的占空比导通，反激电路输出电流为30％，即灯功率为满功率的30％。本实施例通过MOS管Q4将感应器信号翻转，实现和芯片U2的同步输出(由于光耦的存在，使得信号逻辑反转，而增加Q4，将信号逻辑再次反转，因此可以得到正逻辑)。
以上内容是结合本发明的优选实施方式对所提供技术方案所作的进一步详细说明，不能认定本发明具体实施只局限于上述这些说明，对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (5)

  1. 一种带智能感应的驱动电路，包括EMC器件、电源转换电路、整流滤波电路、与电源转换电路连接的控制电路、为控制电路供电的供电模块一、为感应器供电的供电模块二、以及光耦和感应器，其特征在于：还包括MOS管，MOS管的栅极与感应器的输出脚连接，MOS管的漏极与光耦的阳极连接。
  2. 如权利要求1所述的一种带智能感应的驱动电路，其特征在于：所述感应器可依据外界条件变化，输出高电平、方波、低电平。
  3. 如权利要求1所述的一种带智能感应的驱动电路，其特征在于：所述MOS管的漏极另一方面通过一电阻连接供电线路二，MOS管的源极接地。
  4. 如权利要求1所述的一种带智能感应的驱动电路，其特征在于：所述光耦的阴极接地；光耦的集电极一方面连接控制电路，另一方面依次通过一电阻和二极管接供电模块一。
  5. 如权利要求1所述的一种带智能感应的驱动电路，其特征在于：所述控制电路的芯片为带PWM调光接口的电源控制芯片。
PCT/CN2020/124183 2020-02-25 2020-10-28 一种带智能感应的驱动电路 WO2021169348A1 (zh)

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CN111905122A (zh) * 2020-08-18 2020-11-10 浙江宇光照明科技有限公司 一种智控照明杀菌两用灯
CN112203380B (zh) * 2020-09-03 2023-03-17 杭州士兰微电子股份有限公司 调光控制电路及其控制方法
CN117320223B (zh) * 2023-11-29 2024-03-12 深圳市微智电子有限公司 一种led智能照明系统

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