Products, Materials + Tools | Nov 30, 2011

New 20Watt AC/DC-LED-Driver with PFC Is Dimmable Down to Zero and Flicker-Free

TRIAC-dimmers were originally designed to dim incandescent filament lamps. Already the use of CFL lamps causes many problems and the story is continued with LED lamps. LED lamps are the future to illuminate our houses and also public/commercial rooms. Therefore reliable solutions are a must to get the acceptance for these innovative light sources. The elimination of traditional lamp types increases the need for alternative dimming methods.

The use of TRIAC-dimmers in LED-systems causes unwanted flicker, visible to the eye, due to phase modulation. This prevents linear dimming of LEDs down to zero. If existing TRIAC-Dimmers are to be used with LED-systems, a new type of LED-Driver is required.

RECOM releases the RACT20-family, a new generation of AC/DC-drivers, that can be dimmed linearly and without flicker from 100% down to zero. The RACT20-family is equipped with a specially developed TRIAC input, which is not affected by the PFC-circuit of the driver. An ideal solution for many LED-systems, where dimming is easy.    

These new AC/DC-drivers are available with either 230VAC or 115VAC input. They offer 20 Watt and can support 5 to15 power LEDs or LED-chains, with constant currents of 350, 500, 700 or 1050mA. The power factor (PFC) is >95% and therefore better than required by EN 61000-3-2 and meet the class C requirement.

RACT20-drivers are designed for indoor applications, class IP20 and measure only 32.6 x 16.5 x 11.1mm (L x W x H). They are EN/UL 60950-1 certified with a “Design Lifetime” >70.000 hours. Warranty is 5 years.  

For more information or samples please visit RECOMs website ( or sent an email to

RECOM Power has become an innovative leader over the past 35 years in the manufacture and distribution of DC/DC and AC/DC converters, switching regulators and LED drivers, offering vast distribution and customer support networks that reach around the globe. Customers recognize RECOM's ability to deliver top-notch products at competitive prices as well as their worldwide positioning through the establishment of proprietary production facilities that meet the highest international standards and global product availability. RECOM's commitment doesn't end with the purchase of the product, but rather, customers can enjoy exceptional after-sale service and support. For the past 10 years, RECOM has invested heavily in product development, quality assurance lab, and expanding their global presence to accomplish the mission of meeting customer need wherever it may arise.