What are the advantages of high-voltage LEDs?

　　Compared with low-voltage LEDs, high-voltage LEDs have two obvious competitive advantages:

　　First, under the same output power, the drive current required by the high-voltage LED is much smaller than that of the low-voltage LED. For example, the high-voltage blue 1W LED of Epistar Corporation has a forward voltage drop of up  50V. That is, it only needs 20mA. The driving current can output 1W power; and the ordinary 1W LED with a 3V forward voltage drop requires 350mA driving current  output 1W power. Therefore, high-voltage LEDs with the same output power dissipate much less power than low-voltage LEDs during operation, which means that the cost of heat-dissipating aluminum housings can be greatly reduced.

　　Second, high-voltage LEDs can greatly reduce the loss of AC/DC conversion efficiency. Taking 10w output power as an example, if a 1W high voltage LED with a forward voltage drop of 50V is used, the output terminal can be configured in 2 parallel and 4 strings, and the forward voltage drop of 4 series LEDs is 200V, which means that it only needs  be from the mains The 220V alternating current can be reduced by 20V using a bridge rectifier. But if 1W with a forward voltage drop of 3V is used  step down  DC 30V. The lower the input and output pressure difference, the higher the AC/DC conversion efficiency. It can be seen that if high-voltage LEDs are used, the efficiency of the transformer can be greatly improved, which can greatly reduce the power loss during AC/DC conversion. This reduction in heat consumption can further reduce the cost of the heat sink.

　　Therefore, if high-voltage LEDs are used  develop LED general lighting products, the overall power consumption can be greatly reduced, thereby greatly reducing the design requirements for heat dissipation enclosures. For example, a thinner and lighter aluminum enclosure can meet the heat dissipation requirements of LED lamps. Since the cost of the heat-dissipating aluminum housing is one of the main cost components of the LED lighting fixture, the effective reduction of the cost of the aluminum housing also means an effective reduction in the overall cost of the LED lighting fixture. It can be seen that high-voltage LED can effectively reduce the cost and quality of LED lighting fixtures, but its more important significance is that it greatly reduces the design requirements of the heat dissipation system, thus effectively sweeping away the entry of LED lighting fixtures in the indoor lighting market. The biggest technical obstacle. Therefore, high-voltage LED will dominate the future LED general lighting market.