Ming Microelectronics successfully launched a linear constant current control IC-SM2213EN, in ESOP8 package
A single white LED on the market can no longer meet the needs of users. After all, the role of lighting nowadays is not only lighting, but is given more meaning. In interior decoration, its artistic expression depends to a large extent on the artistic effect of lighting. Appropriate lighting can not only better meet the needs of users’ lives, but also create an appropriate atmosphere, enhance the artistic taste of the indoor environment, and create Comfortable indoor environment. And different light colors have different emotional colors, which can create different physical effects.
Therefore, giving full play to the inherent advantages of LEDs and allowing LEDs to be "controllable and adjustable" at any time according to people's lighting needs will enable LEDs to occupy the core position of the lighting field more quickly. As a well-known IC supplier in China, Shenzhen Ming Microelectronics Co., Ltd. (hereinafter referred to as "Ming Microelectronics") meets the pursuit of linear product dimming and color adjustment by lighting manufacturers through continuous product technological innovation.
A few days ago, Ming Microelectronics successfully launched a linear constant current control IC-SM2213EN, which adopts ESOP8 package form, 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 light mixing and is compatible with three-stage brightness adjustment functions. It can be applied to 200Vac~240Vac or 110Vac~130Vac input voltage.
SM2213EN pin distribution diagram
SM2213EN pin description
When SM2213EN is used in the application of three-stage color temperature adjustment, the power switch can be turned on and off according to the power switch, and the switch state of the two output ports can be changed in turn to realize the alternating on and off of 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 a 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, the white light and yellow light will be lit at the same time, and then the light will be mixed to achieve the effect of neutral light.
When SM2213EN is in a three-stage brightness adjustment application, the power switch can be turned on and off according to the power switch, and the output current can be changed in turn, thereby changing the brightness of the LED light. The brightness adjustment of 50%--100%--X% or 50%--X%--100% can be achieved by adjusting the external REXT resistor.
The realization of the three-stage dimming and color adjustment function is mainly attributed to the constant current control technology patented by Ming Microelectronics. It is understood that the output current of the OUT1 and OUT2 ports in SM2213EN is externally adjustable, the maximum current can reach 100mA, and the output current deviation between chips
SM2213EN can be applied to high PF scheme and non-flicker scheme. When applied to a high PF scheme, its PF>0.9; when applied to a non-flicker scheme, its PF>0.5.
Toning application circuit diagram 1 (PF>0.9)
Color toning application circuit diagram 2 (PF>0.5 without stroboscopic)
According to reports, the SM2213EN chip itself has an over-temperature adjustment 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. SM2213EN integrates a temperature compensation function. When the internal temperature of the chip reaches 145 degrees Celsius, the chip will automatically reduce the output current to reduce the internal temperature of the lamp and improve system reliability.
In addition, there is a temperature compensation circuit inside the SM2213EN chip. In order to avoid current loss caused by high chip temperature, the system needs to have good heat dissipation to ensure that the SM2213EN chip works in a reasonable temperature range. Common heat dissipation measures include: the system uses an aluminum substrate and increases The copper area of ​​SM2213EN substrate and increase the heat dissipation base of the whole lamp. SM2213EN supports chip parallel application scheme. If the system output power is too large and the chip temperature is high, multiple SM2213EN chips can be used in parallel.
When linear solutions are popular nowadays, SM2213EN can be used alone in the linear solutions of T5/T8 series LED fluorescent tubes, LED bulbs and LED ceiling lamps. Of course, it is also suitable for LED constant current drive solutions. In the case of three-stage dimming and color adjustment, it can also protect the interior of the LED lamp. Such a cost-effective solution can be said to be an excellent choice for three-stage dimming and color adjustment.
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