Originally Posted by seross69
kpoeticg I would not reply or argue with anything DaveLT says because either he dose not know what he is talking about or he does not know how to explain his self..
Also To me with the manual fan controllers I dont know why they dont just use resistors it is more dependable and more robust..
It would need to be the size of mars then.
Originally Posted by kpoeticg
Thank you seross. I have no background in electronics so it can be hard for me to explain things. I get confused between amps/watts/volts. Only thing i use it for is Ohm's law for calculating resistors needed. I wasn't in any way saying it was bad for the fans. I was talking about the heat that gets dissipated through the fan controller +rep
DaveLT, The Aquaero 5 does have VRM's on it. I believe channels 1+2 share one and 3+4 share one. I have spent countless hours researching this particular topic. I just grabbed that quote by doing a 2 second search on this forum when you said no fan controllers have vrm's.
Great to see them filtering the output but my fan controller has 6 independent high side + low side low On Resistance mosfets
Fan controllers only dissipate heat due to switching inefficiency and mosfet losses, they can't possibly use transistors because they would need to heatsink every single part for a mere 0.5amp fan
Transistor voltage loss due to diode drop : 0.7V*0.5 is 350mW but most single bay fan controllers are so packed the only things i know that would handle 350mW dissipation at 35C delta are TO220 transistors
Putting that aside they DO NOT DISSIPATE any other heat than switching inefficiency and mosfet losses. Same way a motherboard VRMs AND PSUs reason why they dissipate heat(they are pretty much the same thing but VRMs are intended FOR CPUs. The alternate word is "PPM" unless they decided otherwise.)
Other than that i shall reiterate that fan controllers "chop up the voltage" but they DO NOT regulate voltage, they certainly don't. The real definition of a VRM is V
odule and voltage regulators are different since voltage regulators are all-in-one devices that take in DC and produce regulated DC that is not filtered. VRMs are power sections on PC motherboards that take in 12VDC that gets chopped up by a controller AND THEN FILTERED FOR CPUs.
So the Aquaero for a lack of better definition have VRMs but they really are just mosfets not controlled by a "power management chip" AFAIK but still VRMs if you google them are for processors
Like i said again, i am instrument engineer, there is no way i don't know what i'm talking about. I research and develop lab power supplies and bench multimeters so yeah ...