switch mode adapter with output voltage listed as a range

• switch mode adapter with output voltage listed as a range
  Posted by rstor22 on 21 May, 2018 22:30
• I found the following switch mode adapter (model 3A-061WP12) which indicates the output is 9-12V 6W it also says @12V 0.5A.
  
  What does this range of 9-12V refer to?
  
  https://images-na.ssl-images-amazon.com/images/I/91-sceQP4TL._SL1500_.jpg
  
  http://p.globalsources.com/IMAGES/PDT/SPEC/098/K1009205098.pdf
  
  
• #1 Reply
  Posted by Audioguru on 22 May, 2018 00:29
• It might be a bad translation or some of them have poor voltage regulation.
• #2 Reply
  Posted by rdl on 22 May, 2018 03:01
• A few years ago, I tested a 9 volt regulated switch-mode adapter from a well regarded supplier in NYC. At less than 80% of its 1 amp rated output current the voltage had dropped to nearly 7.5 volts.