#high-power led

[ashwor-blog]

The high-power LED price leaves steadily in the second quarter The mobile phone LED in a poor light drops 10% small

According to LEDinsside investigation, the mobile phone market demand goes back warmly in the 2nd quarter, support LED price tendency, drop only in the lower primary school one of 2nd quarter by about 10%. And the high-power LED price is after gliding in the 1st quarter, because the productivity is squeezed by middle-power in the 2nd quarter, it is relatively pressing to supply, so the price keeps steady in the 2nd quarter. LEDinside shows, the general mobile phone screen is in a poor light to use LED assembly of 1400-1600 mcd mostly, the intelligent mobile phone adopts 1700-1800 mcd LED assembly gradually. Though the intelligent mobile phone screen is enlarged gradually, the customer mainly considers the luminance and homogeneity, so the screen under 3.2 still adopts 4-6.

In application in a poor light of the mobile phone, under 2000mcd mostly because of the luminance, so the chip is in short supply influences the aspect and not big to the mobile phone LED in a poor light, drop a little in price. But because the mobile phone market demand of mountain fastness goes back warmly in the 2nd quarter, support LED price tendency, drop only at the price at the beginning of 2nd quarter by about 10% slightly.

In high-power LED, LEDinside points out, the department of Europe is bright (OSRAM Opto) in the first quarter of this year Golden Dragon series last lumen product behind,drop to be about 1.7 dollars prices of LED high-power for 2.0 dollars more than level per watt.

However, the 2nd quarter because LED TV demand rises, make the upstream chip manufacturer move the productivity to LED chip specification of middle-power, so squeeze to the high-power LED chip productivity of the original document, in cases the upstream chip is supplied pressingly, the price of high-power LED appears and holds the steady state tendency in the 2nd quarter.

[evanshy-blog]

The majestic high-power LED of silicon of Shanghai China Resources drives the chip efficiency to reach 90%

PT4105 is developed newly, specially driven the applied fixed frequency voltage mode to step down in the integrated circuit to the high-power LED illumination by the silicon majestic science and technology of Shanghai China Resources, the input voltage can reach as high as 18V, the built-in power MOS tube, output current maximum reachable 1A, can drive single drops of 1W within the range of very wide input voltage ' Electric current 350mA) Or 3W (electric current 700mA) LED, or various high-power LED are strung together / made up in parallel. It is introduced, adopt PWM to control within PT4105, the feedback voltage is only 200mV, has very high conversion efficiency, include functions such as Under Voltage Lock Out, overheat protective, currentlimiting protection,etc., it is convenient to employ the design, the peripheral circuit is simple, it is applied ideal choices such as multinode battery-driven flash-light, car auxiliary lighting, family's decorative illumination, mine lamp,etc.. PT4105 adopts SOIC8 to capsulate. The single 1W high-power LED realized by PT4105 drives the scheme, the voltage range of effective work is 5- 18V, when the input voltage is 5- 12V, its conversion efficiency is above 90%, when the input voltage is 12- 18V, its conversion efficiency is very above 85%. The single 3W high-power LED realized by PT4105 drives the scheme, the voltage range of effective work is 6- 18V, its conversion efficiency is very above 85%. PT4105 has samples and demonstrating boards that can be offered at present. Shanghai the intersection of China Resources and the intersection of silicon and majestic science and technology establish on will it be August 2004, China Resources encourage, cause, make the investment and batch overseas reputable professional personage return to the homeland integrated circuit design company that establish by Hong Kong, absorb in, imitate / the intersection of digital-to-analog and the intersection of hic and research and development of product design. The product line of the company includes DC-DC changing, LED driving, high-performance operational amplifier / multi-type such as audio frequency power amplifier, high-performance LDO at present, the customer includes enterprises such as famous mobile phone, personal digital consumption electronic product, electrical home appliances of China,etc..