I have a general question regarding power factor limits relating to the design of off-line switchmode power supplies.
We will be starting the design of a relatively simple, off-line switchmode power supply that will be used to power an LED Luminaire (for lighting up the outside of buildings). A power supply will be used to drive each of the 3 colours independently (for dynamic colour changing). It will be designed for universal 120/230 Volt input, with an adjustable 20 to 28 Volt DC output. Power output will be 40 Watts maximum. As mentioned, 3 of these power supplies will be used in each Luminaire. My question is: what (if any) power factor requirements are we required to meet, both for North America and for the EU. My first thought was that there are no specific power factor requirements since ordinary computer power supplies have no PFC correction whatsoever (at least not the ones normally available here in North America). But I recall a year or two ago, a conversation with Jim Eichner (one of the inhabitants of this group) where he mentioned there were impending EU power factor requirements. Can anyone shed any light on what PF requirements exist at this power level? Bob Wilson TIR Systems Ltd. Vancouver. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
