Hello, im making an irs2092s based amplifier which im hoping will power my 4 ohm subwoofer with 500w, maybe 750 if I'm lucky.
My amp uses two 12v 30a smps supplies each wired to a "400w" rated 12v to 65v buck boost converter. These two isolated 65v stepups supply the irs2092s with +-65v (120vdc)
I measured the current draw on one of the power supplies whole playing at full volume, measuring a current draw of 2.8A at 12v.
I'm not entirely sure how many watts I'm outputing, based off the current draw mentioned is it likely that I'm getting 500w output?
Is this the right equation:
2.8 A x 60v = 170w (so one step up is putting out 170w?)
Efficiency of stepup is probably around 90%
90% x 170 = 150w
There is two stepups going into the irs2092s so:
150w + 150w = 300w
Am I right? Is the irs2092s only putting out 300w? Not considering losses from the irs2092s
My amp uses two 12v 30a smps supplies each wired to a "400w" rated 12v to 65v buck boost converter. These two isolated 65v stepups supply the irs2092s with +-65v (120vdc)
I measured the current draw on one of the power supplies whole playing at full volume, measuring a current draw of 2.8A at 12v.
I'm not entirely sure how many watts I'm outputing, based off the current draw mentioned is it likely that I'm getting 500w output?
Is this the right equation:
2.8 A x 60v = 170w (so one step up is putting out 170w?)
Efficiency of stepup is probably around 90%
90% x 170 = 150w
There is two stepups going into the irs2092s so:
150w + 150w = 300w
Am I right? Is the irs2092s only putting out 300w? Not considering losses from the irs2092s
Sorry, I realised I made a mistake, the psu has a current draw of 2.8 at 12v, however I was calculating the watts based of the output of the stepup(60v) x 2.8
I must be making a mistake in my measurements, as the 500w rms subwoofer is moving alot and definitely can't be running this loud on just 30w
Also note that it is not two amplifiers.
Two isolated power supplies each outputing 12v are individually wired to their own 12v to 60v stepups
This means there is now two isolated 60v supplies available
The two 60v supplies are wired together at their outputs to give +60v, 0v and -60v which goes to one irs2092s
Two isolated power supplies each outputing 12v are individually wired to their own 12v to 60v stepups
This means there is now two isolated 60v supplies available
The two 60v supplies are wired together at their outputs to give +60v, 0v and -60v which goes to one irs2092s
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