High-voltage(AC) LED lens(Ⅱ)

Views: Date：2012/8/8

2.High Voltage LED
In the same output power, high voltage LED drive current is much lower than the LED. In order to the Epistar hypertension Blu-ray 1WLED example, the forward voltage drop of up to 50V In other words, it is only 20mA drive current on the output power of 1W, while the average forward voltage drop is 3V to 1W LED need to 350mA drive current to output 1W of power, the power dissipation of the same high-voltage LED output power at work is far lower than the low-voltage LED, which means that the cost of the heat dissipating aluminum enclosure can be greatly reduced.

LED high pressure can significantly reduce the loss of AC-DC conversion efficiency, 10W output power, for example, if the forward voltage drop of 50V, 1W high-voltage LED output can be used 2 - and 4-string configuration, four series of LED forward drop is 220V, that is just from the mains 220V AC (AC) the use of bridge rectifier and will be 20V can, but if we 1W low voltage LED forward voltage drop of 3V, 10 strung together to the pressure drop is not more than 30V, which means from the the 220V/AC mains step-down to 30V the DC. We know that the lower the pressure difference of the input and output AC to DC conversion efficiency is higher, visible, such as high pressure LED, the efficiency of the transformer can be greatly improved, thereby significantly reducing the power loss when the AC-DC converters, which a heat consumption to reduce but also to further reduce the cost of the cooling shell.

Therefore, if the high-voltage LED to develop LED general lighting products, the overall power consumption can be greatly reduced, thereby significantly reducing the design requirements of the thermal shell, such as we can use thinner, lighter aluminum casing can meet the cooling needs of the LED lamps an integral part of the cost of aluminum casing to reduce also means that effectively reduce the overall LED lighting costs due to the cost of the heat dissipating aluminum enclosure is the major cost of LED lighting. But even more significant is a significant reduction in the cooling system design requirements, so as to solve the biggest technical problems of LED lighting into the interior lighting market. Therefore, the high-voltage LED will dominate the future of LED general lighting market.