The 5630 mid-power LED now offers efficacy as high as 180 lm/W, and 1W operation in the 3030 LEDs promises to lower the cost of SSL products.
Seoul Semiconductor has announced upgrades to its mid-power LED families both pushing efficacy up and increasing drive current to high-power LED levels. The company believes that maximizing efficacy and lumens per dollar (lm/$) are the key avenues through which an LED vendor can help broaden the deployment of solid-state lighting (SSL) technology.
The new plastic-packaged 5630C LED can deliver efficacy up to 180 lm/W. There has been a race of late to new efficacy levels in the mid-power space. Just before the Lightfair International (LFI) show back in April, Samsung announced 160 lm/W efficacy in mid-power LEDs, claiming that as an industry high. Then at LFI, LG Innotek announced 170-lm/W efficacy in similar products.
Of course, maximum efficacy specifications with LEDs are rarely indicative of how the LEDs are used in actual products, because the maximum efficacy is typically quoted at low drive currents. Seoul has not yet released a full data sheet on the new 5630C LED, nor did the company specify the operating conditions at which 180 lm/W was measured.
The company targets applications including retrofit lamps and tubes, and panel-based fixtures with the 5630 LED family.
Driving 3030 LEDs to 1W
The company also said that it now offers an LED in the 3030 plastic package that can be driven at 1W. That would place the LED in competition at the low end of the high-power LED segment. Seoul said that getting the 3030 LEDs to that power level could reduce SSL product costs by 50%.
Seoul has yet to specify light output, efficacy, or lifetime of the LEDs when operated at 1W. The company's existing 3030 LED is characterized at 100 mA and maximum drive current is stated at 200 mA. To get to 1W the current would have to hit the 300 mA range. The current LEDs deliver 20.9–22.4 lm at 100mA depending on CCT, and doubling the drive current increases flux output by 80%.
