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LED driver targets for smart lighting apps

Posted: 14 Nov 2013     Print Version  Bookmark and Share

Keywords:Dialog Semiconductor  LED driver  smart lighting  wireless connectivity 

Dialog Semiconductor plc has uncloaked its smarteXite platform that the company said enables a generation of highly flexible, programmable LED driver ICs for smart lighting applications. SmarteXite, based on fully configurable logic, is the first LED driver technology to directly and easily support wireless connectivity, light sensor control and allow easy integration into lighting control systems, stated the firm.

The first device from the smarteXite family, the iW6401, supports multiple dimming interfaces, including digital dimming via a simple main on/off switch, the 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, boasted Dialog.

Using a standard I2C digital interface, the iW6401 can serve as a powerful frontend for wireless communication modules such as low-energy Bluetooth, WiFi 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 company also stated that the iW6401 is the world's first programmable AC/DC retrofit LED lamp driver IC, which allows engineers to design and configure the bulb design via software with an optimised BOM versus a time intensive iterative hardware design process. This greatly reduces the time to market and allows a smarteXite-based design to support many different global configurations and lighting requirements.

SmarteXite supports final stage digital calibration on the production line where the bulb manufacturers can reconfigure the illumination calibration settings such as brightness and colour via the A/C mains terminals. This allows lower tolerance LEDs to be used with less binning or waste of LED's. Additionally, using this final stage calibration feature, the adjustment of the LED currents can be done even in the installed state, making the smarteXite platform also ideal for Zhaga compliant power supplies. The iW6401 can be configured to actively manage the lamp temperature using either an on-chip or off-chip temperature sensor together with configurable state temperature control.

LEDs are especially suitable to be dimmed in a wide range. Unlike CFLs and other discharge lamps, LEDs can be set to almost zero current by applying digital control principles. With smarteXite, intelligent control algorithms can be employed and configured to provide a wide dimming range. Additionally, the smarteXite platform offers a range of protection and supervision functions, which can be customised for the different lamp requirements, added Dialog.





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