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LED LIGHTING Zhaga Consortium publishes interface specification for LED light engines Two more interface specifications for LED light engines have been published by the Zhaga Consortium which is an international organization that is enabling the interchangeability of LED light sources made by different manufacturers. Book 7 covers a variety of rectangular and linear LED modules with separate electronic control gear that are intended primarily for use in in do or lighting applications. Book 8 describes a drumshaped LED light engine (LE) with integrated electronic control gear, used primarily for downlighting applications. Book 7 modules are typically mounted directly into a luminaire by means of screws, while Book 8 light engines can be inserted into a suitable socket inside the luminaire. Luminaires built using interchangeable, Zhaga-based LED light sources enable manufacturers to switch from one supplier to another without changing the design of the luminaire. This can increase competition among suppliers, alleviate the risks of having a single source, and allow luminaire makers to take full advantage of light-engine performance enhancements. Books 7 and 8 join Books 1, 2 and 3, which are already available for public use. The other approved Books are expected to be published shortly , and new specifications are in development. Zhaga interface specifications are made public as soon as each specification is stable and the certification procedure is fully established. Zhaga member companies have already received certification for a range of products that were designed according to either Book 7 or Book 8, including LED modules and holders. Zhaga interface specification Book 7 defines the interfaces of a variety of LEs comprised of non-socketable LED modules with separate electronic control gear. Such LEs are intended primarily for use in indoor lighting applications. Book 7 covers several rectangular LED modules with different dimensions. Zhaga Consortium www.zhagastandard.org/specifications Programmable LED driver ICs enable digital dimming, wireless control and sensor control Dialog Semiconductor has released the smarteXite platform based on fully configurable logic, a LED driver technology designed to directly and easily support wireless connectivity, light sensor control and allowing easy integration into lighting control systems. The first device from the smarteXite family, the iW6401, supports multiple dimming interfaces, including digital dimming via a simple main on/ off switch, the new Ledotron digital dimming protocol and toggle-switch based dimming. All dimming-curves can be memory-configured to enable a highly optimised end-user lighting experience. The integrated digital loadline transmission (DLT) receiver in the iW6401 supports the Ledotron IEC 62756-1 dimming protocol, making it the world’s first single-chip plug-and-play Ledotron solution. Using a standard I2C digital interface, the iW6401 can serve as a frontend for wireless communication modules like low-energy Bluetooth, Wi-Fi or ZigBee. Additionally, intelligent sensor devices enabling colour- or proximity-sensing can be directly connected. When such a peripheral device is used, the integrated power management unit in the iW6401 provides a stable power source, reducing the external component count and cost. The iW6401 programmable AC/DC retrofit LED lamp driver IC allows engineers to design and configure the bulb design via software with an optimised bill of material. SmarteXite supports final stage digital calibration on the production line where the bulb manufacturers can reconfigure the illumination calibration settings like brightness and colour via the A/C mains terminals. Dialog Semiconductor www.dialog-semiconductor.com Remote phosphor LED lighting module delivers 203 lumens per Watt Intematix Corporation, a leading manufacturer of phosphor solutions and Philips Lumileds, a leading LED supplier, today announced a remote phosphor-based LED lighting module with 203 lumens per watt efficacy. The module is claimed to represent the highest level of efficacy among LED-based light sources commercially available for production in the market. “This result is a significant step along our innovation roadmap for phosphor solutions,” said Yi-Qun Li Chief Technology Officer at Intematix. “Remote phosphor architectures lower cost, increase efficacy and improve light quality in many of the consumer, commercial, industrial and outdoor area lighting applications commonly deploying LED technology today.” The LED lighting module uses a commercially available, 26 mm diameter dome shaped remote phosphor developed by Intematix that converts blue light to on-the-black-body-line 6000K daylight spectrum and 70CRI with conversion efficacy of 267 lumens per radiant watt. The design is applicable for round and linear module configurations and is offered in color temperatures ranging from 2700K to 6000K with CRI values from 70 up to 98. The groundbreaking lighting module uses Philips Lumileds LUXEON T/TX family of royal blue LEDs, achieving industry leading wall plug efficiencies of 76%. “We’re very proud of this landmark performance of 203 lm/W as this was achieved using our latest commercially available LED technology and Intematix’s remote phosphor,” said Jy Bhardwaj, Senior Vice President of R&D at Philips Lumileds. “This marquee performance simplifies a wide variety of thermally constrained applications such as 100 W A19 bulbs and high lumen candle lamps, and enables downlights with the highest efficacy in the industry.” Remote phosphor solutions are notable for delivering high quality, uniform light and omni-directional light distribution to applications like replacement lamps, high bay industrial illumination and linear applications like commercial lighting. By increasing efficacy, remote phosphor reduces material and operating costs. Intematix www.intematix.com 28 Electronic Engineering Times Europe December 2013 www.electronics-eetimes.com


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