LED Luminaries

LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.

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Luxeon Lime on interesting substrate

Luxeon Lime on interesting substrate

A couple of Luxeon Limes – the most efficacious production LEDs yet – have arrived in the Electronics Weekly office for our Engineer in Wonderland to play with. They are on interesting substrates…

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Clear LED lightbulbs

Clear LED lightbulbs

Philips has introduced an LED bulb that looks a lot like a clear incandescent light bulb. It is not the first company to do it, but it does have a nice clean look. The spec is: 2,700K, 470 lm (’40W’), 6W input (78 lm/W), and it looks like…

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Marvell aims for Zigbee smart bullbs

Marvell aims for Zigbee smart bullbs

Marvell’s 88EM8189 ac-dc LED lighting driver chip is not only phase-cut dimmable, but has an I2C interface to allow digital control – particularly from its 88MZ100 Zigbee tranceiver. It can be used in either non-isolated buck-boost or isolated fly-back designs – primary-side sensing allows isolated…

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Luxeon Z ES gives more light and other whites

Luxeon Z ES gives more light and other whites

April brings a refresh to Lumileds un-lensed Luxeon Z ES range. These little tiny (1.6×2.0mm) lighting LEDs now have higher temperature white options at all CCTs and outputs are up across the range – there is a 245 lm 5,700K 70CRI (typical 700mA 85°C). For a…

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Dialog ups its dimmable LED driver power to 45W

Dialog ups its dimmable LED driver power to 45W

Dialog Semi’s iW3600 is a 45W ac-dc LED lighting controller chip claimed to dim from 1 to 100% with <5% pop-on current. Configurable temperature de-rating is included to prolong electrolytic capacitor life in poorly-ventilated applications. “Designed for retrofit bulbs including external, dimmable lighting ballast…

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Single chip for LED bulbs that dim to lower CCT

Single chip for LED bulbs that dim to lower CCT

Dialog Semi has introduced a single chip dual output power converter that can give incandescent-like LED dimming – where colour temperature (CCT) falls with intensity. Called iW3640, it is a 25W 2-channel mains-powered LED driver that needs no external microcontroller, and is intended for 75-150W-equivalent A19…

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L+B min-power bonanza: 1,000 lm/$ claimed for 3020

L+B min-power bonanza: 1,000 lm/$ claimed for 3020

You can’t move for mid-power lighting LED announcements from Philips Lumileds this month (It’s marketing department, to be fair, did email us in February and call this ‘mid-power March’). This one is the Luxeon 3020. “Luxeon 3020 is the most affordable of all our mid-power…

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L+B: Lumileds aims 30mA LED at fridge lighting

L+B: Lumileds aims 30mA LED at fridge lighting

Luxeon 3014 is a 30mA QFN LED that can deliver 10-12 lm in neutral white, and can be driven up to 100mA for 33 lm. Maker Lumileds is competing with other 3014 manufactures for business in linear and omnidirectional lighting applications such as under cabinet lighting, refrigerator display lighting…

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L+B mid-power bonanza: Hot 1/9 binning for 3030

L+B mid-power bonanza: Hot 1/9 binning for 3030

Lumileds is aiming to hit ANSI specifications under real-life conditions with hot binning for its Luxeon 3030 2D lighting LEDs. “Without hot colour targeting, if a user purchases an LED that was performing on a bin edge at room temperature, it would likely shift out of the specification at…

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L+B mid-power bonanza: Lumileds ups 3535 light by 10%

L+B mid-power bonanza: Lumileds ups 3535 light by 10%

Claiming the most lumen from 6V 3535 lighting LED, Lumileds has increased flux and efficacy by over 10% for high CRI 2700K parts. Called Luxeon 3535 2D, “typical flux levels have increased from 55 lm to 61 lm”, said the firm. “Simultaneously, typical voltage has been lowered resulting in an…

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L+B mid-power bonanza: Sharp CCT tuneable

L+B mid-power bonanza: Sharp CCT tuneable

Sharp has announced a 2,700-6,500K CCT tuneable mid-power LED. The 4.2x3x0.9mm device has two die, one at each colour temperture, and is tuned by externally varying the current ratio between them. “The die are packed closely together to deliver uniform light without shadows,” said…

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L+B: Micro GaN-on-Si lighting LEDs from Toshiba

L+B: Micro GaN-on-Si lighting LEDs from Toshiba

Toshiba has launched a series of ultra-small (0.65×0.65mm) chip scale package white LEDs for lighting applications – reducing mounting area by 90% compared to conventional 3.0×1.4mm products. The new TL1WK series LEDs have been designed as light sources for general lighting, including straight tube lights, light…

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