The power limitations basically have nothing to do with the power supply of the Aquaero (which is the PSU of your computer), but more to do with the transistors used, and the amount of current the traces on the PCB can handle.Originally Posted by liguhy
The stock, unboosted transister on the Aquaro uses the PCB as the heatsink. The main tab of the DPAK package, which happens to be the collector of the transistor, is soldered down to the PCB. So any heat generated, is dissipated by the body of the DPAK, and the back tab, which is soldered to the PCB. If it draws too much current, a lot of heat is gonna be going into the PCB.
There was a thread a couple of days ago, about a guy who had a powerboosted Aquearo, and he saw or smelled smoke coming from it after using it to power his DDC. If you look at the pics in his post, you can look at the solder connection of the tab of the DPAK, and see that some extreme heat went through that thing... almost looking like it reflowed the solder some lol.. Either his pump drew too much current, or that transistor was bad, or had a bad solder connection to the PCB.
if you look at the graphs I referred to in my last post, you'll see lines on the graph for DC, and various pulse widths. DC is the most demanding. A surge would be a pulse, not sure how long it would be, but my guess would be the transistor can easily handle any surge the pump throws at it. But I guess I will hopefully find out tomorrow.... that is if I ask the lady who does rework stuff.. I'm scared of herWhat about startup power requirements from 2 DDC 3.25 or 2 D5s? My current understanding from that linked thread above, while the Aquaero w/ Powerboost can handle them @ load, it can't handle the startup power requirements. What will your mod do to that limitation? What would the maximum watts and amps (per channel 1, 2-4, and overall) with your transistor and heatsink mod?
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