Dave Jeskey tells an interesting story about what happened when an LED lighting company operated a few of its products in a test chamber. The RJ45 plugs, used for making a connection to a Power over Ethernet cable, melted. The RJ45 plugs came from Sentinel Connector Systems where Jeskey is director of sales and marketing. […]
Applications
Mono-color ceramic SMT LEDs target horticultural uses
Würth Elektronik eiSos, manufacturer of electronic and electromechanical components, presents WL-SMDC – the new mono-color ceramic LEDs for SMT assembly – optimally tailored to requirements in artificially illuminated greenhouses. Besides manufacturing products in the common colors of blue, yellow, green and red, these LEDs are also available in the wavelengths 450 nm (Deep Blue), 660 […]
Linear LED controllers offer input range of 4.5V – 60V, 4% reference voltage accuracy
Diodes Incorporated announces the AL5814, AL5817, AL5815 and AL5816 linear LED controllers, delivering dimmable and adjustable drive current for LED strings with more than 80% efficiency. The AL58xx series provides a low BOM-cost solution for a range of applications in the commercial and industrial areas including signage, instrumentation illumination, lighting of appliance interiors, architectural details […]
Development system for wireless power also transfers data
Würth Elektronik eiSos and Infineon Technologies AG are offering a 200-watt development system, the 760308EMP-WPT-200W, for wireless power transfer. Unique to the development kit special is that the link between the transmitter and receiver coils can be used to transfer not only power but also data. The 760308EMP-WPT-200W development kit comprises a power supply, a […]
60 V/1A buck LED driver adds dimming for commercial lighting
A wide input voltage range and integrated power MOSFET make the AL8862 buck LED driver a solution well-suited for developers of LED lighting drive circuits looking to minimize board space and reduce BoM cost with excellent analog and PWM dimming functions. With a typical output current accuracy of 5% at up to 1A and 97% […]
Fully integrated 8-channel LED boost PSiP uses switched capacitor architecture
pSemiTM Corporation (formerly Peregrine Semiconductor), a Murata company focused on semiconductor integration, introduces the PE23300, the industry’s only fully integrated LED boost power supply in package (PSiP) based on a charge-pump, switched-capacitor architecture that offloads most of the power-conversion work from the inductor to capacitors in the charge pump. Powering up to eight LED strings at […]
Deep-UV LEDs target water disinfection apps
The WD series LEDs was developed specifically for the price and performance needs of POU water disinfection. The manufacturer, Crystal IS, says the Klaran WD Series marks the first instance of an ability to break the $0.25/mW price barrier required for mass production of UVC LED based water purification products. The company will initially offer […]
Driving LED arrays, Part 2: power
Part 1 of this FAQ looked at the basics of using LEDs in series, parallel, and series/parallel arrays, the implications on the power-sourcing requirements, and the impact of an LED failure. Part 2 looks at other practical issues associated with powering the array. Q: Given the various configurations, what sort of drive is “best” for […]
Linear equation said to optimize LED positioning for energy efficiency
Open up a typical low-cost LED bulb and you may find LEDs positioned willy nilly around a metal heat-sinking plate. It turns out that not a lot of thought goes into LED positioning on many bulbs aimed at consumers. Often the result is a bulb that consumes far less power than an equivalent incandescent device but […]
Driving LED arrays, Part 1: topologies
Light-emitting diodes – often referred to simply as LEDs – have become the preferred light source in many applications, whether for area illumination, spotlighting, signage, or backlighting. While there are some applications which prefer to use a smaller number of very high-power LEDs, many applications benefit from, or must use, a larger number of lower-to-moderate-power […]
