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AS7220 Color and Lumen Maintenance Manager

Calibrated CCT and lumen output for the life of the luminaire


  • XYZ tristimulus chromatic sensing
  • Delivers algorithmic closed loop target point white CCT and lumen output tuning (single CCT)
  • Presets configurable into flash memory, or via hardware
  • Calibrated nano-optic silicon interference filters
  • 20-pin LGA 4.5mm x 4.7mm x 2.5mm, 0°C to +85°C


  • Accurate supervision to a single CCT target to maintain color temperature over lifetime
  • Delivers lifetime lumen maintenance via internal lux-to-PWM remapping
  • Rapid luminaire integration
  • Lifetime calibrated sensing
  • Compact package with no added optics required

Product parameters

Sensor Type CIE tristimulus XYZ
Application Closed loop color point and lumen compensation
Reference Networking n/a
Smart Ltg Command Set n/a
Lux/CCT Control Flash and hardware configurable
I²C Master for added ambient light sensing
Package 20-pin LGA with aperture

General Description

The AS7220 calibrated CCT and lumen maintenance smart lighting manager optimizes CCT and lumen and color output via a combination of PWM and/or 0-10V controls with dimming ballasts. Configurable single CCT lifetime target values are stored at the time of manufacture, allowing the AS7220 to manage independent LED strings to assure consistent CCT over time, temperature, and the full range of dimming. Target lumen output lux-criteria are similarly configurable and are used by the AS7220 to map internal lux to manage LED strings to replace "percent of drive current" with "percent of rated lumen output", for all dimming operations. CIE tristimulus XYZ chromatic white/color sensing provides accurate CCT measurement to allow closed loop compensation to the preset target. The AS7220 is delivered fully calibrated, while the integrated intelligence enables lifetime CCT calibration to within 2-4 macadam steps.

This product suits for the following applications:

  • Enables luminaire manufacturers to maintain rigid color point and/or lumen maintenance standards requirements
  • Luminaires intended to meet California Title 24 daylighting requirements
  • Commercial, retail, and residential white/color LED lighting systems
  • Autonomous, solid-state lighting manager for long term color point and lumen maintenance


Title Category Headline Buy
AS7221/20/11/10 Smart Lighting IntegrationKit Application Board Smart Lighting Integration Kit for AS722x/1x

Technical Documents

Name Type Description Version Language
AS72xx_AN000488_3-00.pdf Application Note AS72xx How to Program AS72xx Firmware with FlashCatUSB 1V24 3-00 English
AS7220_BD000345_1-00.png Block Diagram AS7220 Block Diagram 1-00 English
AS7220_DS000509_1-00.pdf Datasheet Document version 1-00 1-00 English

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