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AS7220 CCT and Lumen Maintenance Manager

Selectable CCT and lumen output maintained for the life of the luminaire


  • Intelligent controller with integrated XYZ tristimulus sensor and selectable CCT presets
  • Industry standard CCT presets via mode resistor, or single CCT target value in Flash
  • Selectable drive modes, including PWM-switched current steering or PWM-based duty cycle management
  • Remaps dimming response from percent of power to percent of rated lumen output
  • 20-pin LGA 4.5mm x 4.7mm x 2.5mm, -40°C to 85°C
  • Compact lighting-capable package with no added optics required


  • Flexible manufacturing and stocking inventories… One BOM can support multiple CCT SKUs
  • Eliminates lumen/color binning penalty, significantly reducing cost of quality lighting
  • Enables cost-optimized single channel drivers to deliver a precise CCT result
  • 100% lumen maintenance factor over the life of the luminaire

Product parameters

Sensor Type CIE tristimulus XYZ
Applications Closed loop CCT 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

Simplify single or selectable CCT luminaire and replacement lamp designs with the AS7220 calibrated CCT and lumen maintenance smart lighting manager. Closed loop calibrated tri-stimulus color sensing for direct CIE color point mapping and control enables lower precision components to produce a higher-quality single or selectable-CCT luminaire or replacement lamp.

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. In addition, a selection of industry standard CCT targets can be selected via resistor configuration to enable a single BOM to satisfy multiple CCT SKUs while increasing lifetime color precision. 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.

Legacy controls are fully supported with direct connection to 0-10V control,. Control outputs include direct PWM management of digital LED drivers or analog 0-10V for standard dimmable drivers.

This product suits for the following applications:

  • Accurate lamp to lamp CCT and lumen output
  • Flexible finished goods luminaire and replacement lamp inventory approaches
  • Selectable CCT, in the factory or at the customer
  • Standalone color and lumen maintenance lumaires and lamps


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


Type Description Language
Evaluation Software AS72xx Firmware Update using GUI EN
App Configuration Tool for AS72xx EN

Technical documents

Type Description Language
Datasheet Document version 1-00 English
Application Note AS72xx External Flash program and update 10V1 English
Application Note AS72xx How to Flash AS72xx Firmware using English
Application Note True Color Luminaire Design Bluetooth Connected English
Application Note AS72xx How to Program AS72xx Firmware with FlashCatUSB 1V24 English
Other Product Document AS7220 2-slide brief English
Other Product Document ams Smart Lighting Short Intro-Jun 2018 English


Type Description Language
Product Change Notification CN25-2019 (Customer Information AS72xx) English

Other information

Type Description Language
Block Diagram AS7220 Block Diagram English
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