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Switching Power Supplies A - Z, Second Edition
Switching Power Supplies A - Z, Second Edition, by Sanjaya Maniktala (Newnes), starting at $42.69
Home » Test Your Skills » Power
PC Power Supplies – Part 2
Author: Gabriel Torres Last Updated: August 10, 2009

1. Switching power supplies are also known as DC-DC converters because:

The +5 V and +3.3 V outputs are generated from the +12 V output.
The power supply converts the input alternating voltage into DC, oscilates this voltage and then converts this oscilating voltage into DC.
They convert the wall AC voltage into DC.
This isn’t true, only some switching power supplies are DC-DC converters.
None of the above.
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