Nowadays, a single white LED on the market can no longer meet the needs of users. After all, the role of lighting is now more than just lighting, but is given more meaning. In interior decoration, its artistic expression relies heavily on the artistic effect of lighting. Suitable lighting can not only better meet the needs of users, but also create a proper atmosphere, enhance the artistic position of the indoor environment, and create Comfortable indoor environment. Different lighting colors have different emotional colors, which can create different physical effects. Therefore, give full play to the innate advantages of LED, let LED be "controllable and adjustable" according to people's lighting needs, which will make LED occupy the core position of lighting field more quickly. As a well-known IC supplier in China, Shenzhen Mingwei Electronics Co., Ltd. (hereinafter referred to as “Mingwei Electronicsâ€) has been continually innovating in product technology to meet the pursuit of linear product dimming by lighting manufacturers. Recently, Mingwei Electronics successfully launched a linear constant current control IC-SM2213EN, which is in ESOP8 package format, which can easily meet the needs of consumers for dimming and color adjustment. It is understood that SM2213EN is a LED linear constant current control chip that can realize the first stage of mixed light and is compatible with three-stage brightness adjustment function. It can be applied to 200Vac~240Vac or 110Vac~130Vac input voltage. SM2213EN pin distribution map SM2213EN pin description When the SM2213EN is used in the three-stage color temperature adjustment application, the power switch can be turned off and the two output port switches can be changed in turn to realize the alternate brightness of the two different color LED lights to achieve the purpose of adjusting the color temperature. The output power can be adjusted by adjusting the external REXT resistor to achieve the color temperature state of (0.5A+0.5B)--AB. According to Ming Microelectronics, in the first stage (0.5A+0.5B) color temperature adjustment of SM2213EN, white light and yellow light will be lit at the same time, thus achieving light mixing and achieving neutral light effect. When the SM2213EN is used in three-stage brightness adjustment, the brightness of the LED light can be changed by changing the output current according to the power switch on and off. 50%--100%--X% or 50%--X%--100% brightness adjustment can be achieved by adjusting the external REXT resistor. The realization of the three-stage dimming color function is mainly attributed to Mingwei's patented constant current control technology. It is understood that the output current of OUT1 and OUT2 ports in SM2213EN is externally adjustable, the maximum current can reach 100mA, and the output current deviation between chips is <±4%. The SM2213EN is suitable for high PF solutions and stroboscopic solutions. When applied to a high PF scheme, its PF>0.9; when applied to a stroboscopic scheme, PF>0.5. Toning application circuit diagram 1 (PF> 0.9) Color application circuit diagram 2 (PF> 0.5 no stroboscopic) According to reports, the SM2213EN chip itself has an over-temperature regulation function. When the internal temperature of the LED lamp is too high, it will cause serious light decay of the LED lamp and reduce the service life of the LED. The SM2213EN integrates temperature compensation. When the chip reaches 145 degrees Celsius over temperature, the chip will automatically reduce the output current to reduce the internal temperature of the lamp and improve system reliability. In addition, the SM2213EN chip has a temperature compensation circuit inside. In order to avoid the current leakage caused by high chip temperature, the system needs to have good heat dissipation treatment to ensure that the SM2213EN chip works in a reasonable temperature range. Common heat dissipation measures are: the system uses an aluminum substrate and increases The copper area of ​​the SM2213EN substrate and the heat sink base of the entire luminaire. The SM2213EN supports chip parallel applications. If the output power of the system is too large and the chip temperature is high, multiple SM2213EN chips can be used in parallel. In the popular time of the linear scheme, SM2213EN can be applied to the linear scheme of T5/T8 series LED fluorescent tube, LED bulb and LED ceiling lamp separately. Of course, it is also suitable for LED constant current driving scheme. In the case of three-stage dimming and coloring, it can also protect the inside of the LED lamp, and a solution with such a good price-performance ratio can be said to be an excellent choice for three-stage dimming color. UV Screen Protector,UV Curing Machine,UV Curing Screen Protector Shenzhen Jianjiantong Technology Co., Ltd. , https://www.jjtphonesticker.com
