Since the LED light source entered the field of general illumination, it began to slowly replace the traditional light source, and increasingly occupied the core field of illumination. In addition to the advantages of low energy consumption, no pollution, no mercury, long life, and strong controllability, the LED light source is distinguished from the traditional light source. Therefore, how to maximize the innate advantages of LED, LED in accordance with people's lighting needs, at any time "controllable and adjustable", will make LEDs occupy the core position of the lighting field more quickly. How to achieve cost-acceptable "controllable and adjustable" will be very important.
At present, the types of LED controllable and adjustable chips on the market can be said to be various, but the quality of the chips is not good, and various problems may occur in the chips.
The linear constant current chip SM2213EA is the leader in dimming color. Most of the mosquito killers on the market will only have the appearance of SM2213EA if you look closely. What is special about this linear constant current chip? Can the function of so many LED lamp manufacturers like to use this linear constant current solution?
The linear constant current chip SM2213EA can input the voltage value of 110vac, or the input voltage working value between 220v, the high PF scheme of the linear constant current chip SM2213EA, the PF value is 0.9, and the PF value without stroboscopic scheme is greater than 0.5, two kinds of humanity. The solution is available to engineers
The linear constant current chip SM2213EA is a 3-stage dimming/coloring temperature LED constant current drive control circuit suitable for 200V~240V AC input voltage with constant current accuracy less than ±4%. When the linear constant current chip SM2213EA is used for 3-band brightness adjustment, the SM2213EA can change the output current according to the turn-off power switch to change the brightness of the LED. The adjustment ratio can be adjusted by the external REXT resistor.
When the linear constant current chip SM2213EA is used in the 3-segment 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 lighting of two different color LED lights to achieve the purpose of adjusting the color temperature. The REXT resistor regulates the system output power.
The switching time of the linear constant current chip power supply scheme SM2213EA system scheme is controlled by the chip VDD port. The relationship between the capacitance value and the reset time is shown in Figure 1. It is recommended to take 1uF and the capacitor withstand voltage is 16V.
The reset time of the linear constant current chip power supply scheme SM2213EA system scheme is controlled by the chip VCC port. The relationship between the capacitance value and the reset time is shown in Figure 2. The recommended value is 4.7uF and the capacitor withstand voltage is 16V.
The design of the linear constant current chip SM2213EA is low in cost, and the over-temperature compensation function is also integrated inside the chip. The simple structure of the chip can facilitate the operation of the engineer and is used together with the PCB solution board without destroying the inside of the chip. Stabilizing the quality of LED products and gaining more consumers' recognition, it can be said that in the current controllable adjustable solution market, the linear constant current chip solution SM2213EA has a great position.
The linear constant current chip SM2213EA brings convenience to our life, brings more colorful life, and diversification of lighting products. It just shows that consumers are pursuing the direction of LED lighting. The future LED manufacturers must be consumers. The direction and pursuit to develop more and better, more convenient electronic chips, high-voltage linear constant current chips, power supply ic and other new product models.
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