DC Power Requirements

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  #1  
Old 01-04-16, 02:42 PM
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DC Power Requirements

Hello,
I have two small pumps and a small circuit board that needs to be powered by dc. The board can run on a variety of dc powers and the pumps are 12v and .7a. I would like to run all of this equipment on one converter. Do I just need one that puts out 12v and is rated to at least 2a? assuming the board will not draw.6a (which it will not). The board is a basic pwm. Thanks
 
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  #2  
Old 01-04-16, 03:04 PM
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As long as the board can be run on 12 volts as well, then yes, a 12v 2amp power supply should be sufficient. I'd probably go a little bigger to have some extra margin and the difference in cost should be minimal.
 
  #3  
Old 01-05-16, 09:57 AM
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For long life, I never load a power supply over 75% of its rated output, and that's with a power supply I know well. For an unknown power supply, I'd use 60%; been "burned" too often.
 
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