Leland Teschler, Executive editor lteschler@wtwhmedia.com On Twitter @ DW_LeeTeschler A year ago, if your cocktail party conversations had included the idea of adding germicidal lights to a connected car, you probably would have elicited facial expressions suggesting you’d lost your mind. Today, the same idea would be more likely to engender a lot of head […]
LED drivers target automotive apps with wide programmable frequency operation, spread-spectrum clock
The TS19501 single-channel, dimmable LED driver targeting high-brightness automotive applications is well suited for virtually every automotive LED application: high and low beam headlights; daytime running lights; turn indicators; position indicator lights; fog lights; ATV and four-wheel drive high-brightness lamps. The IC is also offered in a version ideal for a wide range of non-automotive […]
Blue-green chip LEDs optimized for color universal design apps
Rohm recently announced the1608-size high accuracy blue-green chip LEDs, SMLD12E2N1W and SMLD12E3N1W. These products support the adoption of Color Universal Design (CUD) in a variety of applications, such as fire alarm system indicator lights, industrial equipment warning lamps and public transportation information displays. Color is considered to be one of the most important means of communication and as […]
Is UV-C light germicidal? Illuminating Engineering Society FAQs give the low-down
The Illuminating Engineering Society (IES) has released a lengthy FAQ on the use of ultraviolet light for germicidal purposes and specifically relative to the COVID-19 virus. The UV report was authored by the IES Photobiology Committee. The IES notes that companies are offering products such as disinfecting wands that could clearly be dangerous because of […]
It may become easier to disinfect with UV-C LEDs
UV radiation in the 200 to 300-nm range (dubbed the UV-C range) can destroy viruses, including the coronavirus. Problem is, doing so requires UV radiation sources putting out sufficiently high doses of UV light. That typically means using a relatively expensive mercury gas discharge lamp. It’s possible to find sources employing LEDs that put out […]
When it comes to UV-C LED lights, buyer beware
During the coronavirus pandemic, there’s been a lot of interest in using germicidal lamps to disinfect surfaces rather than hosing everything down with bleach or disinfectant. Lamps are a little easier to work with when you’ve got things like knobs, buttons, and slider controls on test instruments that may not do well when doused with […]
4-channel LED driver ICs with built-in MOSFETs target automotive uses
Rohm recently announced the availability of 4ch linear LED driver ICs with built-in MOSFET ideal for LED rear lamps (turn/stop), fog lamps and turn signals for automotive use. In recent years the adoption of automotive-grade LED lamps is advancing from the viewpoint of power savings and design flexibility, while the number of lamps and brightness […]
Killing Covid-19 with UV-C LEDs
Yes, light in the UV-C part of the spectrum will destroy the virus. Here are the basics and a few myths surrounding these light emissions. For those of us still working, it can be a bit unsettling to ponder whether the surfaces we touch harbor a few virions left over from someone infected with Covid-19. […]
Myth busted: No, LEDs don’t get 50% dimmer after a year
A one-year burn-in test helps refute a small piece of fake news about LED bulbs. We’ve torn down a number of LED bulbs over the years to analyze their content and design strategies. But when we published some of our findings a little over a year ago, we got this missive in the comment section: […]
LED drivers and controllers simplify efficient and reliable lighting design
ON Semiconductor has launched a new family of four devices that facilitate the high levels of performance and innovative functionality that vehicle manufacturers and consumers now expect from automotive exterior and interior lighting. Aimed specifically at low power solid state lighting, the new family comprises two LED drivers (NCV7683 and NCV7685) and two current controllers (NCV7691 and […]
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