Sure. ?In theory you could crack open the IRF510 package and cool the die with liquid nitrogen. ?In practice, much easier to go with multiple devices. ? I suggest you copy the push-pull IRF510 amp plus the 3 driver stages that Ashhar has on the uBitx, and run that at 24v: ?
Primary issue is heat dissipation. ?The IRF510 is spec'd at 3.5 degrees C from die to the TO220 tab. ?Assuming 50% efficiency, ,at 36 watts the die is dissipating 36 watts as heat. ?So the die is 36*3.5 = 126 degrees C ?or 227 degrees F hotter than the tab. ?And the tab is going to be hotter than your heatsink. ?And the heatsink is hotter than the ambient air. ?From that, it's clear that asking 25 watts per IRF510 is already asking a lot. ?If your IRF510 heatsink is anything more than lukewarm, then the die is close to molten.
Jerry, KE7ER?
On Sat, Apr 1, 2017 at 10:50 am, Chris Coel wrote:
Could in theory we go higher than 25 watts or would that blow a circuit? Say 36 watts with enough cooling to get maybe 40w or more out?
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