> Hi! > > > > > at these extremes... the diodes wont help....and the dioes will simply > > > burn up due to the current it has to pass to get to that "voltage" > > > one side being a diode drop ( 0.7v ) across itself.. > > > - a power mosfet is better suited ... > > hmm, mosfet doesn't make sense to me - IIRC they only work like switches > > I think you should use "Shotkey-diods" the largest one i know could pass > 200 ampere - and they've less than ~0.4V voltage drop
Hi! Mosfets are a kind of transistors with less loss of energy than a bipoar type. I agree that the only thing you could use is a shottky diode, the drop is about 0.1-0.2 Volts, I think; therefore it won't produce so much heat and maybe you won't even need any heatsinks for them. But I think it is generally not a good thing to reduce the supply voltage by 0.2 Volts this way, because computers are very sensitive to voltage changes... If there will be a high load for only a short time, the voltage maybe drops down the specs and your components are down. Regards, Stephan Hachinger
