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 […]
Why we don’t need energy efficiency standards for lighting
Leland Teschler | executive editor Headlines were made recently when two national associations dropped a lawsuit attempting to squash light bulb efficiency standards in California. The California standards supposedly save Californians billions of dollars on their energy bills and avoid millions of tons of carbon-warming pollution. The suit was brought by NEMA (National Electrical Manufacturers […]
Wide input range, dimmable 1-A drivers handle up to 15 high-brightness LEDs
The RCDE-48 series of LED driver modules accept up to 60 Vdc input voltage and produce a 1,050-mA constant-current output with analog or PWM deep dimming. Developed by RECOM, the RCDE-48 series of LED driver modules can provide up to 350 mA, 700 mA or 1,050 mA of constant-current to drive strings of up to […]
Linear driver allows more LEDs to be driven from low supply voltage
Diodes Incorporated announced the BCR430UW6 linear LED driver with ultra-low dropout voltage and constant current regulation between 5mA and 100mA. This combination allows more LEDs to be driven from a low supply voltage, making the BCR430UW6 suitable for applications that require multiple LEDs to operate together, such as signage illumination and architectural lighting for commercial […]
Automotive LED drivers operate at input voltage range of 4.5V to 55V
Diodes Incorporated announced the AL8843Q and AL8862Q automotive-compliant DC-DC buck converters, designed for driving single LEDs and multiple LED strings in and around vehicles. Applications include daytime running lights (DRL), which many manufacturers now offer as standard, as well as fog lights, turn lights, and brake/stoplights. With a supply voltage from 4.5V and to at […]
Will LEDs go purple?
Examine an LED bulb and you are likely to find the LEDs on board are phosphor-converted white LEDs (PC-LEDs). These are created either from blue- or near-ultraviolet-emitting chips emitting light at about 450 nm that are coated with a yellow phosphor. The phosphor down-converts the light output into lower visible light frequencies. PC-LEDs that operate […]
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