The importance of the 12 v LED with distributed constant current architecture technology

LED encapsulation into 12 v, it can thoroughly solve the power design difficult, life is short, many problems of higher price. Adopt the distributed constant current design the most stable, price optimization, the most economical product architecture, combined with the 12 v encapsulation, nominal value will be dominated by the power. Break the power supply design pattern to adapt to the LED specification, which in turn LED encapsulation nominal value to adapt to the power supply voltage.

we think before the company in the design of LED encapsulation, more is to consider the LED encapsulation itself, combined with application design considerations is less, is what will rarely consider the future lighting packaging format. LED lamps production enterprise to develop the power to LED packaging format, excessive packaging format and numerous design concept, make our power supply design do not know how to start. In turn the LED light source directly to adapt to the switching power supply, everything becomes simple, because the switching power supply after decades of development and technology precipitation, has become very standardized, very stable.

the LED lighting products research focus on secondary DC part, distributed constant current architecture technology, solve to adapt to the lighting of the LED packaging technology, this is the question about which we focus on today.

　　1. 12 v LED importance

we all think that is: first, constant voltage, constant current again. Nominal value proposition voltage LED encapsulation, i. e. , 12 v, 24 v, 36 v, 48 v nominal voltage value, because the voltage is universal power nominal value. Found in the development as long as 12 v LED key encapsulation can apply in all nominal voltage value, the reason behind several multiples of voltage is 12 v. Single LED encapsulation into 12 v, string 2 design is 24 v, 3 star is 36 v, 48 v. Four is The importance of the 12 v LED.

LED encapsulation to 12 v is not imagination of so simple, direct concatenated chip, three driving voltage is less than 10 v, so drive power efficiency is not high. Simple four series of more than nominal value 12 v, driving voltage deviates from the value of the nominal voltage. There's something that needs to be LED chip to cutting, the choice of appropriate suitable current density, 12 v LED encapsulation into reality.

　　2. Distributed constant current architecture

distributed constant current is: in each of the parallel branch points are set up independent constant current source, to manage, maintain and control branch and whole line is stable. In use can be considered as a complete circuit structure, and practical application is the distribution of all nodes in the line of constant flow control and be able to communicate. Distributed constant current LED products design, has a very high product stability. In the current, LED products claim that there is a difference with the actual service life, accumulated in driving circuit design technology co. , LTD. , a distance is used to assess product life and the actual. Drive circuit stability directly affect the product the overall stability, the distributed constant current has a unique advantage.

keep branch and overall current stability, but also can control management branch and the whole line work, this is distributed constant current architecture technology contains the scope. LED needs constant current drive, but current depends on the size of the application environment, intelligent LED lighting development is the key, intelligent distributed constant current technology fully reserved interface.

the biggest characteristic is distributed constant current architecture technology, keep AC power supply part of the traditional switching power supply, constant voltage power supply mode. Switching power supply technology accumulation will create quality conditions for the LED power supply design, although the accelerated aging estimates power is a kind of way to life, and the traditional switching power supply technology built up long-term practical experience or some gap! In currently used more in the design of street lamp switch constant-current module, compared with low pressure differential constant current IC, switch efficiency of constant current, constant current, EMI, less cost, reliability, precision low dropout linear constant current drive. There is no need for complex constant current module completely.

constant-current source placed some flexible, of all the parallel branch, do not influence other branch by branch current work. All want to choose the LED load impedance matching, distributed constant current can design more perfect, request is not high also can avoid picking. Keep the selection and the whole line current is stable, can improve the stability of lamps and lanterns products.

distributed constant current technology is in need of constant current node concatenated, low dropout linear constant current drive. Low pressure difference is very important, related to the product drive efficiency. Do constant current drive there are a lot of kinds, including low dropout linear constant current can achieve all the LED application design, stable and simple, combined with the switching power supply, has a perfect constant-current driven architecture. In low pressure environment, linear constant current drive efficiency is highest.

constant current source is placed in each parallel branch node, also can be the whole point of constant current design, constant current source in the concatenated branch in one location can have very good effect. Constant current driver channel number is hard to matching with design, distributed constant flow with high design flexibility.

in the LED lighting circuit design, AC power need feedback circuit, cooperate with the number of output LED driver, and the rationality of the drive efficiency. In the distributed constant current driver, every driver can directly optical coupling feedback task. Drive circuit around 0 device, this is our goal, surrounding 0 error accumulated device will not bring the device parameter design, caused by peripheral device error accumulated precision of constant current back to zero.

　　3. Conclusion

under the wave of rapid development of LED technology, LED will become one of the main lighting source, unified driver design thought, clear design ideas. In a more optimized design approach, breakthrough development of architecture, as the LED lighting technology development to make due contributions! This article to encapsulate the 12 v LED with distributed constant current architecture technology application principle, prospect and significance, hope that the industry has a bigger breakthrough.