Cree Application Note: CLD-AP268 REV 1 INTRODUCTION When operated in parallel strings, as is common in many linear LED designs, LEDs driven at relatively low currents (e.g., less than 20 mA for 3-V mid-power LEDs) will exhibit unacceptable light output and hue variations across the strings. These light output variations are caused by normal production [Read More]
Change Notices Latest Cree LED SMD LED End-of-Life Notification: Affected Product List: CLYBB-FKA Summary PCN Reference Number: CreeLED-PCN-5183: Summary: Description of the Change Cree LED is qualifying additional suppliers of the ESD diode for the affected LEDs. The maximum reverse voltage for the affected LEDs will change to 1V. PCN Reference Number: CreeLED-PCN-5159: Description of the [Read More]
The new Cree 5050 mid power K class led, due in production in Sept 2020 will be a 220 lumen per watt variant of the 5050 product range. Its a considerable jump in performance over existing 5050 plastic package leds and a big step forward when one considers the limits on most multi die mid [Read More]
Cree has recently revamped the PCT(Product Characterisation Tool) now called PCT4 or Version 4. This is a significant upgrade in that it further goes deep into underlying key data about Cree leds that previously required additional calculation to get to data that customers need. As of this writing the Cree online version is 3, but [Read More]
Nichia has recently announced the 757G-MT mid-power LEDs with white tuning from 2700K to 6500K enabled by two die integrated in the 3030 platform. Nichia tuneable White LED Nichia’s Tunable 757 receives rave reviews from industry leaders, including the coveted LpS Best Sustainability Technology Award. Tokushima, Japan – 4 October 2019: Nichia, the leader in [Read More]
COB LEDs are very cost effective light sources in LED lighting business. Lets examine this light source, so what exactly is COB? First of all, the abbreviation COB means Chip-on-Board. Cree COB topside, The yellow substance is phosphor, below the phosphor are blue led chip. When powered the blues chips excite the phosphor creating white [Read More]
Nichia leds approach CRI=100 without UV die Nichia announced its Optisolis LED line with the components now available in 3030 midpower and COB versions, delivering CRI well above 90. Nichia unlike Seoul Semiconductor who are trying to match SPD to the sun, are attempting to match the Optisolis SPD to that of the standard illuminant [Read More]
EOL doesn’t have to mean end of life as we know it The lighting industry a chequered performance when it comes to obsoleting parts, however if you’re at the end of the supply food chain, upstream performance has much to answer for. At the led level, most companies have very stringent quality processes that handle [Read More]
