CN206490876U - A kind of lighting lamp circuit with constant current function - Google Patents
A kind of lighting lamp circuit with constant current function Download PDFInfo
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- CN206490876U CN206490876U CN201720209214.9U CN201720209214U CN206490876U CN 206490876 U CN206490876 U CN 206490876U CN 201720209214 U CN201720209214 U CN 201720209214U CN 206490876 U CN206490876 U CN 206490876U
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Abstract
Description
技术领域technical field
本实用新型涉及一种照明电路,具体是一种具有恒定电流功能的照明灯电路。The utility model relates to a lighting circuit, in particular to a lighting lamp circuit with a constant current function.
背景技术Background technique
随着全球温室效应所引起的负面效应不断显现,世界上各个国家都把节能减排作为本国经济发展中所必须考虑的一个重要问题,LED 照明技术正是在此背景之下应运而生的一项新兴节能技术。目前 LED 照明产品已经应用到了日常生活中,随着LED的迅速发展。现在白光LED光源相比的传统光源具有寿命长、固体照明不易损坏、高光效、无汞环保、抗震等优点,未来将成为第三代光源,将带来照明领域的又一次革命。尤其是在延时照明灯的应用上,目前常见的延时灯大部分使用计时器芯片控制,不仅制作成本高,而且稳定性较差。As the negative effects caused by the global greenhouse effect continue to emerge, countries around the world regard energy conservation and emission reduction as an important issue that must be considered in their own economic development. It is against this background that LED lighting technology emerged as the times require. An emerging energy-saving technology. At present, LED lighting products have been applied to daily life, with the rapid development of LED. Compared with the traditional light source, the white LED light source has the advantages of long life, unbreakable solid lighting, high light efficiency, mercury-free environmental protection, and earthquake resistance. It will become the third-generation light source in the future and will bring another revolution in the lighting field. Especially in the application of time-delay lighting, most of the common time-delay lights are controlled by timer chips, which not only has high production cost, but also has poor stability.
实用新型内容Utility model content
本实用新型的目的在于提供一种具有恒定电流功能的照明灯电路,以解决上述背景技术中提出的问题。The purpose of this utility model is to provide a lighting circuit with a constant current function to solve the problems raised in the above-mentioned background technology.
为实现上述目的,本实用新型提供如下技术方案:In order to achieve the above object, the utility model provides the following technical solutions:
一种具有恒定电流功能的照明灯电路,包括按键K、电阻R1、三极管V1和芯片IC1,所述按键K的一端连接三极管V2的发射极和电源E的正极,按键K的另一端连接电阻R1,电阻R1的另一端连接电容C1、二极管D1的阴极、三极管V1的集电极和三极管V3的基极,三极管V2的集电极连接电阻R4、LED灯具H和芯片IC1的引脚1,三极管V2的基极连接电阻R2,电阻R2的另一端连接电容C2和三极管V3的集电极,二极管D1的阳极连接电阻R4的另一端和晶体管V4的漏极,电源E的负极连接电容C1的了另一端、电阻R3、三极管V1的发射极、三极管V3的发射极、晶体管V4的源极和芯片IC1的引脚3,电容C2的另一端连接电阻R3的另一端和晶体管V4的栅极,LED灯具H的另一端连接芯片IC1的引脚2。A lighting circuit with a constant current function, comprising a key K, a resistor R1, a transistor V1 and a chip IC1, one end of the key K is connected to the emitter of the triode V2 and the positive pole of the power supply E, and the other end of the key K is connected to the resistor R1 , the other end of resistor R1 is connected to capacitor C1, the cathode of diode D1, the collector of triode V1 and the base of triode V3, the collector of triode V2 is connected to resistor R4, LED lamp H and pin 1 of chip IC1, the pin 1 of triode V2 The base is connected to the resistor R2, the other end of the resistor R2 is connected to the collector of the capacitor C2 and the transistor V3, the anode of the diode D1 is connected to the other end of the resistor R4 and the drain of the transistor V4, the negative electrode of the power supply E is connected to the other end of the capacitor C1, Resistor R3, emitter of transistor V1, emitter of transistor V3, source of transistor V4 and pin 3 of chip IC1, the other end of capacitor C2 is connected to the other end of resistor R3 and the gate of transistor V4, and the LED lamp H The other end is connected to pin 2 of chip IC1.
作为本实用新型的优选方案:所述三极管V1为光敏三极管。As a preferred solution of the present invention: the triode V1 is a photosensitive triode.
作为本实用新型的优选方案:所述芯片IC1的型号为AMC7135。As a preferred solution of the utility model: the model of the chip IC1 is AMC7135.
作为本实用新型的优选方案:所述三极管V2为PNP三极管。As a preferred solution of the present utility model: the triode V2 is a PNP triode.
作为本实用新型的优选方案:所述按键K为轻触开关。As a preferred solution of the present utility model: the key K is a tact switch.
作为本实用新型的优选方案:所述三极管V2为NPN三极管。As a preferred solution of the present utility model: the triode V2 is an NPN triode.
与现有技术相比,本实用新型的有益效果是:本实用新型具有恒定电流功能的照明灯电路结构简单、元器件少,摒弃了计时器控制结构,仅使用基本的电容结合三极管的方式实现了延时照明控制,同时电路采用恒流驱动芯片,确保LED照明稳定性,因此具有成本低、性能稳定和节约电能的优点。Compared with the prior art, the beneficial effect of the utility model is: the utility model has a constant current function lighting lamp circuit structure is simple, fewer components, and the timer control structure is abandoned, and only the basic capacitance combined with the triode is used to realize The time-delay lighting control is realized, and the circuit uses a constant current driver chip to ensure the stability of LED lighting, so it has the advantages of low cost, stable performance and energy saving.
附图说明Description of drawings
图1为具有恒定电流功能的照明灯电路的电路图。Figure 1 is a circuit diagram of a lighting circuit with a constant current function.
具体实施方式detailed description
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
请参阅图1,一种具有恒定电流功能的照明灯电路,包括按键K、电阻R1、三极管V1和芯片IC1,所述按键K的一端连接三极管V2的发射极和电源E的正极,按键K的另一端连接电阻R1,电阻R1的另一端连接电容C1、二极管D1的阴极、三极管V1的集电极和三极管V3的基极,三极管V2的集电极连接电阻R4、LED灯具H和芯片IC1的引脚1,三极管V2的基极连接电阻R2,电阻R2的另一端连接电容C2和三极管V3的集电极,二极管D1的阳极连接电阻R4的另一端和晶体管V4的漏极,电源E的负极连接电容C1的了另一端、电阻R3、三极管V1的发射极、三极管V3的发射极、晶体管V4的源极和芯片IC1的引脚3,电容C2的另一端连接电阻R3的另一端和晶体管V4的栅极,LED灯具H的另一端连接芯片IC1的引脚2。Please refer to Figure 1, a lighting circuit with a constant current function, including a button K, a resistor R1, a transistor V1 and a chip IC1, one end of the button K is connected to the emitter of the transistor V2 and the positive pole of the power supply E, and the button K The other end is connected to resistor R1, the other end of resistor R1 is connected to capacitor C1, the cathode of diode D1, the collector of transistor V1 and the base of transistor V3, the collector of transistor V2 is connected to resistor R4, LED lamp H and the pin of chip IC1 1. The base of the transistor V2 is connected to the resistor R2, the other end of the resistor R2 is connected to the capacitor C2 and the collector of the transistor V3, the anode of the diode D1 is connected to the other end of the resistor R4 and the drain of the transistor V4, and the negative electrode of the power supply E is connected to the capacitor C1 The other end of the resistor R3, the emitter of the transistor V1, the emitter of the transistor V3, the source of the transistor V4 and pin 3 of the chip IC1, the other end of the capacitor C2 is connected to the other end of the resistor R3 and the gate of the transistor V4 , the other end of the LED lamp H is connected to pin 2 of the chip IC1.
三极管V1为光敏三极管。芯片IC1的型号为AMC7135。三极管V2为PNP三极管。按键K为轻触开关。三极管V2为NPN三极管。Transistor V1 is a photosensitive triode. The model of chip IC1 is AMC7135. The transistor V2 is a PNP transistor. Button K is a light touch switch. The transistor V2 is an NPN transistor.
本实用新型的工作原理是:电路中的电源E输出12V直流电压给整个电路供电,其中,光敏三极管V1作为光控元件,白天光照充足时,三极管V1导通,此时即使按下按键K,三极管V3的基极也不得电,只有夜晚或阴雨天气光线不足时,按下按键K,三极管V3的基极得电,同时电源E通过按键K、电阻R1给电容C1充电,充电作为V3的偏流使得V3、V2先后导通,芯片IC1得电,芯片IC1为降压恒流驱动芯片,接在芯片IC1上的LED灯具H触发点亮,此时松开按键K,电容C1通过三极管V3的基极放电,因此三极管V2和三极管V3持续导通,LED灯具H持续工作,因此,根据电容充放电的基本原理可知,改变电容C1的容值即可改变延时时间。The working principle of the utility model is: the power supply E in the circuit outputs 12V DC voltage to supply power to the whole circuit, wherein the photosensitive triode V1 is used as the light control element, when the daylight is sufficient, the triode V1 is turned on, even if the button K is pressed at this time, The base of the triode V3 is also not powered, only at night or in rainy weather when the light is insufficient, press the button K, the base of the triode V3 is powered, and the power supply E charges the capacitor C1 through the button K and the resistor R1, and the charge is used as the bias current of V3 Make V3 and V2 conduct successively, the chip IC1 is powered on, the chip IC1 is a step-down constant current drive chip, and the LED lamp H connected to the chip IC1 is triggered to light up. At this time, the button K is released, and the capacitor C1 passes through the base of the triode V3. Therefore, the triode V2 and triode V3 continue to conduct, and the LED lamp H continues to work. Therefore, according to the basic principle of capacitor charging and discharging, it can be known that changing the capacitance of capacitor C1 can change the delay time.
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