AS7225 tunable-white lighting smart system sensor expands ams portfolio

This sensor-driven system on a chip (SoC) lighting family reduces time-to-market for original equipment manufacturers (OEMs) and market adoption of variable-correlated colour temperature (CCT) and daylight-responsive light emitting diode (LED) lighting.

The AS7225 tunable-white lighting smart system sensor from ams enables ening 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 a smart lighting design. The result, says ams, is higher precision, more flexible LED binning, and lower system costs for tunable white lighting systems.

The AS7225 has what ams claims is an industry-first, an embedded tri-stimulus International Commission on Illumination (CIE) XYZ colour sensor to enable precise colour sensing with direct mapping to the CIE 1931 colour space which is recognised as the standard co-ordinate definition for human colour perception. CCT and daylighting tuning directives are communicated to the host microprocessor via an industry-standard I²C interface, allowing internet of things (IoT) smart lighting manufacturers to avoid costly calibration and tuning algorithm development and reduce time to deployment.

The AS7225 is an extension of ams’ Cognitive Lighting smart lighting manager family. It is available in a 4.5 x 4.7mm land grid array (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. Alternatively it can deliver combined CCT-tuning and daylighting directives by the addition of ams’ TSL4531 ambient light sensor.

The AS7225 spectral tuning IoT smart lighting manager has a comprehensive register-driven command set enabling complete sensor control plus management of precision tuning directives. There is also integrated support for tunable white, daylighting or combined functionality lighting options.


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