The LED is packaged into 12V, which completely solves the problem of difficult power supply design, short power supply life and high price. Using Distributed Constant Current to design the most stable, cost-optimized, and most economical product architecture, combined with a 12V package, it will dominate the world's power supply. Breaking the power supply design to adapt to the LED specification pattern, in turn, the LED package adapts to the nominal value of the power supply voltage.
We believe that the previous companies in the design of LED packaging, mostly consider the LED package itself, combined with less consideration of application design, which will be the form of future lighting package. LED lighting manufacturers are striving to develop power supplies to adapt to LED package forms, too many packaging forms and numerous design concepts, so that our power supply design is impossible. In turn, the LED light source directly adapts to the switching power supply, and everything becomes simple, because the switching power supply has become very standardized and stable after several decades of development and technology precipitation.
The main research focus of LED lighting products is on the secondary DC part, the distributed constant current architecture, and the LED packaging technology that adapts to the lighting. This is the issue we are focusing on today.
1. 12V LED importance
We always think that it is: first constant pressure, then constant current. It is recommended that the voltage nominal value package LED, namely: 12V, 24V, 36V, 48V nominal voltage value, because these voltages are the nominal value of the universal power supply. In development, it was found that as long as the focus packaged 12V LED can be applied to all nominal voltages, the latter voltages are multiples of 12V. The single LED package is 12V, the string 2 design is 24V, the 3 is 36V, and the 4 is 48V. Visible the importance of 12V LED.
To make the LED package 12V is not as simple as imagined, the chip is directly connected in series, and the three are less than 10V driving voltage, so the driving power supply is not efficient. A simple 4 series connection exceeds the nominal value of 12V, causing the drive voltage to deviate from the voltage nominal value. There are still some methods, which need to re-cut the LED chip , properly select the appropriate current density, and make the LED package 12V become a reality.
2. Distributed constant current technology
The distributed constant current is: an independent constant current source is established at each parallel branch point, thereby managing, maintaining, controlling the branch and the overall line stability. It can be regarded as a complete line structure in use, and the practical application is constant current control distributed in each node of the line and can communicate with each other. Distributed constant current design LED products have very high product stability. At present, LED products claim to have a large gap with the actual service life. In the case of limited accumulation of drive line design technology, the life of the product is estimated to be far from the actual use. Drive line stability directly affects the overall stability of the product, and distributed constant current has a unique advantage.
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