Lighting manager enables cost-effective variable-CCT LED lighting

Claimed to be the first integrated, white-tuable smart lighting manager, the AS7221 Spectral Tuning IoT Smart Lighting Manager is available from ams.

As a result, precision CCT or Kelvin tuning capabilities can be integrated in IoT, smart lighting, says the company. The architecture includes an I²C extension interface to deliver Internet of Awareness IoT sensor hub capabilities to detect air quality, temperature, occupancy, and presence.

The AS7221 is equipped with an embedded tri-stimulus CIE XYZ colour sensor for precise colour sensing with direct mapping to the CIE 1931 colour space.

The device provides precise colour point tuning, smoothly controlling CCT transitions between configured warm and cool white LED strings within a luminaire.  In addition to the colour- and CCT-tuning functions, the AS7221 includes automatic configuration support for the company’s TSL4531 ambient light sensor for turnkey daylighting capabilities.

The resulting smart lighting manager is an integrated luminaire control system, compatible with standard 0 to 10V inputs and enabled for IoT connectivity and network control via Bluetooth Smart, ZigBee or WiFi, through a complete Smart Lighting Command Set. LED control for spectral tuning is implemented via direct PWM channel outputs. According to the company this reduces development and integration time, compared with using bulky, discrete components.

The AS7221 has been added to the company’s Cognitive Lighting smart lighting manager family. It is available in a 5.0 x 5.0mm LGA package, for integration into luminaires and larger replacement lamps.


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