AMS Expands Singapore Facility; Launches AS7220 Smart Light Manager

AMS -- info graphic and photo depicting results of AS7220 CCT and Lumen Output Manager

AMS, a supplier of sensor solutions based in Austria, announced the expansion of its business in Singapore with a new manufacturing facility in Ang Mo Kio. The company has scheduled the opening of the new plant for July 2017. In other AMS news, the company launched the AS7220 Smart Light Manager.

According to AMS the new facility in Singapore will help AMS meet the growing demand for advanced sensor solutions that are used in state-of-the-art mobile applications. The company noted in a news release that over time the company intends to invest $100million in differentiating technologies, equipment, and employees for the region.

AMS boasts that its sensor solutions are at the heart of products and technologies that define the world today, including mobile devices and smartphones, smart homes/buildings, industrial automation, and connected vehicles, as well as many of the devices that comprise the Internet of Things (IoT).

Heptagon, a member of the AMS Group, began business operations in Singapore in 2007 at its original site in Defu Lane. Locating some of the company’s manufacturing and R&D operations in Singapore is part of the company’s core R&D and manufacturing strategy going forward. AMS also plans to expand in locations such as NanoSpace @ Tampines, where it intends to operate a fully automated clean room featuring state-of-the-art filter deposition technology for high-precision, optical color sensors.

Mr. Lim Kok Kiang, Assistant Managing Director of EDB said, “We welcome Heptagon, a member of the AMS Group’s, expansion, along with AMS’ planned state-of-the-art sensor manufacturing facility in Tampines. It is a good example of component companies moving up the stack to develop system solutions. The capabilities and ecosystem we have built across different high-value manufacturing sectors, in this case, Precision Engineering and Electronics put Singapore in a favorable position to capitalize on such developments.”

AMS Introduces AS7220 Smart Lighting Manager

AMS says that the AS7220 Smart Lighting Manager employs closed-loop sensing to maintain more accurate lumen output and correlated color temperature (CCT) while also lowering the system bill of materials. The new Smart Light Manager follows the Jan 2017 launch of the AS7221 smart lighting manager that offered full white color tuning and daylighting features.

The AS7220 combines a precise calibrated-for-life color sensor with an intelligent Cognitive Lighting Engine that offers standalone closed-loop maintenance of the output from strings of warmer and cooler white LEDs. The result is a luminaire which automatically adjusts for the color shift and lumen depreciation of LEDs resulting from aging, operating temperature changes and driver variation over its lifetime.

Widens Range of Allowable Flux and CCT

AMS notes that in premium lighting systems for commercial, industrial and high-end residential users, manufacturers must typically rely upon tightly-binned LED combinations to achieve the desired CCT. However, employing sophisticated sensor-driven algorithms of the AMS AS7220 Smart Lighting 
Manager enables the manufacturer to use cool-white and warm-white LEDs that are more loosely binned for CCT- and flux to achieve a high quality and stable light source.

According to AMS the wider range of CCT and flux that its sensors allow gives luminaire makers a substantial competitive advantage. First, luminaire producers can broaden the competitive supply base from which LED production units may be sourced. Secondly, the resulting increase in production flexibility eases the management of LED inventory. The wider range of allowable LED CCTs and outputs eases the requirement for LED drivers and power supplies to provide precisely regulated outputs, thereby opening the supply base of those components

AMS says that the AS7220 is easy to integrate into LED lighting system designs. After the desired CCT and/or full-output lumen values are programmed into it on the production line, it autonomously implements closed-loop color and output control of the LEDs inside a luminaire or lamp.

Control of Power Supplied to LED Strings

The power supplied to the LED strings is controlled through the use of digital switching of multichannel power supplies or a combination of PWM current steering combined with an analog or digital output to standard single-channel 0-10V or PWM-input dimming ballasts or drivers.

“A continuing challenge in the LED lighting industry is to deliver precisely the same color and output not only over changes in operating temperature but over the years of service life that customers expect,” said Tom Griffiths, senior marketing manager at AMS.

The company points out that while LEDs are well characterized for their first years of operation, longer-term predictive models reveal brightness and color variability.

In addition, LEDs are improving so fast that the same parts are unlikely to remain the cost-effective choice for the same model of luminaire even as little as one year after going into production, introducing still more variation from light to light.

“By adding closed-loop sensing to their product’s architecture, luminaire manufacturers free themselves from these technology and supply constraints, lowering bill-of-materials costs and gaining both consistency and a wider basis for component selection, while delivering more precise lighting quality over lifetime,” he said.

The AS7220 comes pre-configured for use with an optional external AMS ambient light sensor for autonomous daylight harvesting with standard 0-10V dimming inputs. The Smart Lighting Manager can directly interface with standard occupancy sensors to enable intelligent dimming control and energy-saving schemes.

Tri-stimulus CIE XYZ Color Sensor Maps Data to CIE 1931

The AS7220 features the company’s tri-stimulus CIE XYZ color sensor that directly maps the sensor channel data to the CIE 1931 color space for accurate and stable CCT control.

Nano-optic interference filters deposited on the die of AS7220 devices offer high stability and are virtually immune to degradation over time and temperature changes. The sensor system’s LGA package measures just 4.7mm x 4.5mm x 2.5mm, and it includes a built-in aperture with a ±20.5° field of view.

The device integrates logic capabilities to deliver factory-calibrated CCT values typically accurate to within .002 du’v’ (approximately 2-3 Macadam steps) across its -40 to +85 degree C operating temperature range.

The AS7220 Smart Lighting Manager is available now in production volumes with unit pricing at $2.81 in order quantities of 10,000 units. An evaluation kit for the AS722x family is available from the AMS ICdirect online store. For sample requests and more information, visit