General Description
The AS7220 Smart Lighting Manager is part of the ams
Cognitive Lighting™ family of products that enable lights to
autonomously adapt to human lighting and energy
conservation needs. The device is equipped with an advanced
Cognitive Lighting Engine (CLE) to optimize CCT and lumen
maintenance and color maintenance via a combination of PWM
and/or 0-10V controls with dimming ballasts. Daylight
harvesting can also be performed by adding an I²C connected
ams ambient light sensor.
AS7220 XYZ chromatic white/color sensing provides mapping
to x, y (z) of the CIE 1931 2-dimensional color gamut coordinates
and scales the coordinates to the CIE 1976 u’v’ coordinate
system. The AS7220 integrates standard observer filters into
standard silicon via nano-optic deposited interference filters
which deliver high-stability over time and temperature. The
LGA package includes a built-in aperture to control light
entering the sensor array. Integrated intelligence enables
lifetime CCT calibration to within 2-4 Macadam steps.
The AS7220 connects to standard 0-10V dimmer inputs and
drives 0-10V dimming ballasts/drivers to enable a highly
cost-effective white tunable current-steering luminaire design
with a single-channel constant current ballast. Direct PWM
inputs can also interface to standard LED drivers or
multi-channel ballasts for constant voltage LED lighting
architectures.
Applications
Autonomous, solid-state lighting manager for precision fixed
CCT and daylight harvesting:
• Configurable CCT and/or lumen maintenance
applications
• Luminaires intended to meet California Title 24
daylighting requirements