GaN-on-Si high power white LEDs step up light output

September 10, 2015 // By Graham Prophet
These LEDs provide high luminous flux and lower power consumption for domestic and public applications. Toshiba Electronics Europe has added four new products to its TL1L4 series of white LEDs, for applications ranging from street and stadium lighting to LED light bulbs and down-lighting for use in the home.

GaN-on-Si technology has been applied to create LEDs optimised for both output and energy efficiency. The 4A5B type improves upon existing products by providing a luminous flux of 140 lm at current of 350mA, and Tj=85°C, compared to 130 lm. They make it possible to meet the market demands for improved lighting fixture efficacy by achieving efficacies of over 110 lm/W.

Measuring 3.5 x 3.5mm, with a lens-top, the new LEDs offer differing levels of correlated colour temperature (CCT), with the TL1L4-DW0 providing 6500K, the TL1L4-NT0 providing 5700K, the TL1L4-NW0 5000K and the TL1L4-WH0 4000K. All offer a colour rendering index of Ra70 min. and a typ. forward voltage of 2.8V.

Toshiba Electronics Europe; www.toshiba.semicon-storage.com