ercoming the thyristor dimming problem, Ming Micro's new driver IC "high power"

Energy conservation is one of the most prominent advantages of LED, and it is also an important basis for the government to issue policies to promote the application of this technology. With the advancement of lighting technology, the introduction of dimming technology in general lighting can give greater play to the energy-saving advantages of LED lighting.

At present, there are various dimming methods on the market: PWM dimming, thyristor dimming, 0-10V & 1-10V dimming, DMX, etc. The thyristor dimming is used earlier for incandescent and energy-saving lamp dimming methods, and is also widely used in LED dimming. The advantages of thyristor dimming are high working efficiency and stable performance.

However, based on the working principle of thyristor dimming, there are some design flaws in application. It is understood that the prior art linear thyristor dimming scheme has the following problems:

1. The efficiency is low, causing the temperature of the whole lamp to be high. In order to solve this problem, additional heat treatment (such as potting) is needed;

2. When the voltage of the network is fluctuating, the brightness of the whole lamp will change;

3, dimming compatibility is poor, it is difficult to be compatible with a variety of dimmers;

4. There is strobe in the dimming process.

In order to solve the above problems of the existing linear thyristor dimming scheme and improve the dimming effect, Ming Micro has introduced a linear dimming driver IC-SM2396EK. According to Gaogong LED, the core of the technology lies in the patented linear thyristor dimming control technology, which realizes the thyristor online detection and improves the efficiency of the system. At the same time, the patented line network compensation technology is used to realize the whole lamp in a certain voltage range. The effect of internal constant light. Through the application of the core technology, a variety of dimming compatibility problems can be solved, and the stroboscopic index satisfies the certification requirements during the dimming process.

Mingwei Electronics related technical engineers introduced to Gaogong LED that the current 21 mainstream thyristor models on the market, SM2396EK can be well compatible with 19 of them, and the compatibility of similar solutions in the market is better.

It is reported that SM2396EK adopts patent control method of thyristor, which is compatible with traditional lines and easy to replace and promote. Secondly, the patented thyristor dimming control circuit improves the efficiency and light efficiency of the system, under the same optical flux requirements. Reduce system temperature and improve system reliability. Compared with the bulb lamp application scheme, the efficiency without the dimmer is 82.70%, and the efficiency with the dimmer is also 78.40%.

Application of SM2396EK on bulbs

In addition, the linear scheme has simple peripheral circuits, is more convenient for customers to use, and has lower cost, and is particularly suitable for products with small size and narrow space. It must be mentioned that the SM2396EK is mainly used in 120Vac@60Hz dimmers, and the percentage of flickering in the whole process is <10%, and the dimming stroke is wider than the market.

Based on the excellent dimming performance of the SM2396EK, the driver IC has received widespread attention in the market since its launch, and customers have received rave reviews:

Customer A: This series of products has changed the traditional concept of low dimming efficiency of linear products, and the conversion efficiency can be even higher than the shoulder switching power supply;

Customer B: This series of products solves the change of lamp brightness caused by the fluctuation of the wire network;

Customer C: This series of products has good dimming compatibility, mainly used in 120Vac@60Hz dimmers;

Customer D: This series of products has no stroboscopic dimming

Customer E: This series of products has been easily certified and has few peripheral components;

Customer F: This series of products has simple peripheral circuits, especially suitable for products with limited space (such as filament lamps, GU10, spotlights, etc.);

Customer G: This series of products has high production consistency and good reliability;

Customer H: This series of products is flexible in application, and the power of a single chip can be adjusted by an external resistor to support the parallel expansion of the power of the chip;

Customer I: This series of products has intelligent temperature compensation characteristics, which can adjust the current with temperature changes and improve reliability.

It must be said that Ming Micro Electronics SM2396EK series products effectively overcome the difficulties of the thyristor dimming solution on the market and solve the pain points of the lighting industry (such as efficiency temperature volume performance). At the same time, this series of products can be shared with the lamp beads, with high integration and integrated production. “Mingwei products must be quality products” This is the customer's recognition of Mingwei electronic products, and is also a high trust for Mingwei brand.