[PDF] Fan Speed Control is Cool! - AN1784   [Open results in new window]
... The one exception, however, is that DC-DCs are ideally 100% efficient and don't
generate any heat (real-world efficiencies tend to be around 75% to 95%). ...
pdfserv.maxim-ic.com/en/an/AN1784.pdf

Fan Speed Control is Cool! - Maxim   [Open results in new window]
... The one exception, however, is that DC-DCs are ideally 100% efficient and don't
generate any heat (real-world efficiencies tend to be around 75% to 95%). ...
www.maxim-ic.com/appnotes.cfm/an_pk/1784/ - 51k