White LEDs key category
White LEDs remain a key category in the diode selections of Hong Kong suppliers. These are among the most-widely available and promoted, thanks to extensive use in general, commercial and consumer lighting products. Growing adoption in LED lamps, which are seen to replace fluorescent and energy-saving luminaires, is likewise boosting the line’s popularity. The type is also applied in LCD backlighting, indicators, and decorative, fl ash, emergency and automotive illumination.
White diodes come in a range of sizes, mounting options, viewing angles, shapes and power ratings. Many are round 1 and 3W models with a dome lens and heat sink. Versions without the last are offered as well.
Some suppliers provide linear, square or circular white LED arrays. There are also SMD kinds in the mainstream 0603, 0805, 1206 and 2209 packages.
Through-hole white types can be ordered in 3, 5 and 10mm, 2x3x4 and 2x5x7mm, and round-sharp, fl at-top, oval, side-emitting, helmet and bullet variants. Super flux and top-view units in single- and multichip configurations may also be sourced.
Infrared LEDs are included in many product rosters, but most suppliers do not consider them a priority due to much smaller demand compared with white varieties. These come mainly in 5 and 3mm throughhole packages, and are suitable for remote controls, security cameras, night vision equipment and sensors. SMD and axial-lead models are also available. Power types for high-flux output applications are provided in SMD packaging with or without heat sink.
Toyo LED Electronics Ltd develops and manufactures InGaN-on-sapphire SMD top diodes in PLCC-2 and PLCC-6 packages. These can be sourced in cool-, pure- and warm-white emitted color options. The supplier also offers nonand water-resistant flexible versions in 500mm strips and 5m reels. Its high power white selection includes 5, 10, 20 and 20W variants.
Yes International Co. supplies round 1 and 3W white single-chip units with lens domes. The high-power UV LED specialist carries a range of models for photocatalyst, UV-curing, counterfeit detection, increased-resolution optics and related applications.