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switch mode adapter with output voltage listed as a range
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rstor22:
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

Audioguru:
It might be a bad translation or some of them have poor voltage regulation.
rdl:
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.
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