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ams has introduced the AS7225 tunable-white lighting smart system sensor, further broadening the solution set for sensor-integrated tunable-white lighting solutions. With the addition of the AS7225, OEM lighting manufacturers can access ams’ closed-loop CCT tuning and daylight compensation, while retaining the existing host microprocessor architecture in their 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 color sensor to enable precise color sensing with direct mapping to the International Commission on Illumination (CIE) 1931 color space which is recognized as the standard coordinate definition for human color perception. CCT and daylighting tuning directives are communicated to the host microprocessor via an industry-standard I2C interface, allowing IoT smart lighting manufacturers to avoid costly calibration and tuning algorithm development and reduce time to deployment.

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.

The AS7225 is an extension of ams’ Cognitive Lighting smart lighting manager family. It comes in a 4.5 x 4.7mm 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, it can additionally be used looking outward in luminaire designs to provide precise daylight management, or delivering combined CCT-tuning and daylighting directives by the addition of ams’ TSL4531 ambient light sensor.

Key features of the AS7225 include:

• 'Calibrated for life' Tri-stimulus XYZ color sensor for direct mapping into the CIE color space
• Comprehensive register-driven command set enabling complete sensor control plus management of precision tuning directives
• Integrated support for tunable white, daylighting or combined functionality

The AS7225 spectral tuning IoT smart lighting manager is available in production volumes now. For further information, click here.