LED illume has gotten popular in whole illume application, accompanying wisdom city, the development of intelligent street lamp, LED drive power source also forward intelligence is changed, digitlization way develops. Ying Feiling serves as lead intelligent LED illuminative banner supplier, from problem of look upon of systematic level angle, offer outstanding digital product and solution for the client, the product that offerring high-powered performance and systematic solution while, huge reduced the cycle that the pressure of client inventory and new product roll out, the flexibility that expanded research and development is designed. IC of drive of Ying Feiling illume tastes a type with its are produced richly, extensive develop attacks combination, tie-in industry is banner technology of power transistor CoolMOS, satisfied the requirement of semiconductor device type selecting that LED drive power source designs adequately.

 

Digital control program of Ying Feiling is based on from some digital nucleus CPU, combine powerful power semiconductor to make a technology, will both organic compositive together, innovated the technology of IC of digital LED drive with banner industry, had measured before this produce 3 products, XDPL8105, XDPL8220, ILD2111. XDPL8221 is the fresh blood in IC of drive of LED of intelligence of number of Ying Feiling set, compositive PFC and stimulate controller instead at an organic whole, SO16 is narrow body is enclosed, have constant current, constant voltage, be restricted power outputs working status 3 kinds, move interface of smooth interface and communication independently, extremely low THD and bide one’s time power comsumption, make its have powerful competition ability.

 

1. Ying Feiling counts word controller to summarize

 

If concept of controller of Ying Feiling number pursues 1 show, the kernel is embedded CPU is Ying Feiling has digital nucleus oneself, power transformation controls the load that reduced CPU, improved systematic efficiency. Compositive ADC converter and power high pressure start periphery unit and drive. Perfect protective function also along with all the others compositive inside.

 

Graph controller of 1 Ying Feiling number

 

2. XDPL8221 system is summarized

 

Typical XDPL8221 system principle is shown 2 times like the graph, PFC of compositive and critical mode and former margin control allow XDPL8221 height resonance stimulates controller instead, reduced a system greatly yuan amount of parts of an apparatus. Two degree program reduced output ripple, reduced alone the one class requirement to designing surplus, reduced cost further.

 

XDPL8221 compositive THD optimizes algorithm, make the system has very high PF cost and very low THD value. Distinctive constant voltage, constant current, be restricted switch of freedom of power control mode, offerred extremely high area to carry flexibility, the person that the system designs research and development is OK of utmost use systematic hardware capacity.

 

The parameter of the system of OTP unit storage inside chip, export electricity for example, output voltage, power of the biggest output, protective mode is waited a moment. Parameter perhaps can be measured in phase of research and development produce produce a line aspirant travel is configured afresh, this makes the user falls in the condition that does not change hardware parameter, generate different aircraft to plant, achieve the goal that much opportunity of real a platform plants.

 

Low bide one’s time the demand of power comsumption is increasing in illume application, bide one’s time the demand is lower and lower, XDPL8221 is low to 100mW bide one’s time the new surveyor’s pole that power comsumption erected an industry.

 

In addition, interior and external the on the safe side that has gotten used to temperature to protect function and other protective functions to defending a system together oneself.

 

Typical system of graph 2 XDPL8221

 

The essence of XDPL8221 of paragraphic will main introduction below follows principle of former edge pilot, what PF/THD optimizes is algorithmic, move smooth performance, protect a function, and function of distinctive real time communication.

 

2. 1 XDPL8221 former edge controls principle and precision

 

Weaveform of model of pilot of XDPL8221 former edge pursues, the system stimulates electric current of peak value of transformer former edge to calculate instead through detecting sub electric current and shed protection too. The reflection voltage that assists winding through detecting will calculate sub voltage, when demagnetization time ends, through diagnosing ZCD foot voltage is worth can cipher out exports voltage worth right now. On the foundation of foregone output voltage and electric current, the algorithmic implementation that passes software is restricted power control.

 

If the graph is shown 4 times,output characteristic curve for XDPL8221, in constant voltage paragraph, right now power source job is in constant voltage area, output electric current needs according to laden condition under fair value. In constant current paragraph, right now power source job is on constant current dot, output voltage needs under fair value, with the output that will assure whole system power is inside control limits. In be restricted power paragraph, the product of voltage and electric current needs to be less than or be equal to the power of the biggest output of set. In be restricted below power mode, its are restricted the precision of power is in 2% less than. Be restricted power mode application suits drive COB lamp quite bead.

 

 

Graph 4 XDPL8221 outputs characteristic curve

 

2. 2 XDPL8221 system inputs PF value and THD value

 

XDPL8221 interior is compositive THD optimizes a function, make THD is mixed inside limits of whole input voltage the THD property that very wide output holds outstanding below power circumstance.

 

Graph 5 THD optimizes algorithm and result of test of 50W Demoboard THD

 

Graph 5 right place shows the THD curve that is actual measurement. Can see from the curve, full voltage inputs condition to fall, arrive in 30% load inside 100% laden limits, THD can be accomplished under 12% , also can satisfy EN61000-3-2 standard requirement at the same time.