Tunable-white lighting smart system sensor

Tunable-white lighting smart system sensor

New Products |
By Graham Prophet

Mixed-signal and sensor IC maker ams (Premstaetten, Austria) has added the AS7225 tunable-white lighting smart system sensor, enabling use of the company’s closed-loop CCT tuning and daylight compensation, while retaining the existing host microprocessor architecture in a smart lighting design. The result is higher precision, more flexible LED binning, and lower system costs for tunable white lighting systems.


The AS7225 is equipped with the product family’s embedded tri-stimulus CIE XYZ colour sensor to enable precise colour sensing with direct mapping to the International Commission on Illumination (CIE) 1931 colour space which is recognized as the standard coordinate definition for human colour perception. CCT and daylighting tuning directives are communicated to the host microprocessor via an I²C interface.


“As the lighting industry moves to tunable solutions, the inclusion of closed loop sensor-driven integration not only increases white or daylighting tuning precision, it also loosens the required precision for both LED binning and system components. This results in cost reductions for both the overall bill of materials, as well as in time and cost savings in the materials management and manufacturing processes”, commented Tom Griffiths, Senior Marketing Manager at ams.


AS7225 is available in a 4.5 x 4.7 mm LGA package, for flexible integration into luminaires, light-engines and larger replacement lamps, such as LED linear T-LED products. The device provides precise CCT tuning direction between configured warm and cool white LED strings within a luminaire. In addition to the CCT- tuning functions, the AS7225 can be used looking outward in luminaire designs to provide precise daylight management, or can deliver combined CCT-tuning and daylighting directives by the addition of ams’ TSL4531 ambient light sensor.


Features of the AS7225 include:

• “Calibrated for life” Tri-stimulus XYZ colour sensor for direct mapping into the CIE colour space

• Register-driven command set enabling complete sensor control plus management of precision tuning directives

• Integrated support for tunable white, daylighting or combined functionality


Pricing for the AS7225 spectral tuning IoT smart lighting manager is $2.40 (5,000).





If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :    eeNews on Google News


Linked Articles