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Old 21st January 2011, 02:38 AM   #1
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Default irf510/9510 or irf530/9530

I want an amplifier, and now candidates are irf510/9510, irf530/9530, one is the capacitor current is also small, but small, one large capacitor current is also large, with tl072q driver, who can give me advice?
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Old 22nd January 2011, 08:21 AM   #2
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Sadly,no one answer to me?
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Old 22nd January 2011, 08:45 AM   #3
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You are lacking many basic concepts, So Sad, that you haven't done your home work yet and came around asking improper questions.
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Old 23rd January 2011, 02:40 AM   #4
CBS240 is offline CBS240  United States
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What pwr into what load Z? would be a good start.
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Old 23rd January 2011, 02:17 PM   #5
ontoaba is offline ontoaba  Indonesia
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Do you need it with large capacitor and small capacitor, the small capacitor will be around the driver.
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Old 23rd January 2011, 06:48 PM   #6
AndrewT is offline AndrewT  Scotland
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this might be for a headphone amplifier, or possibly for a line driver.
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Old 23rd January 2011, 07:15 PM   #7
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To my mind a common big issue for using mosfets in linear amplifiers is heat conduction, and large-die parts have lower thermal resistance to the heat sink. That would speak for the '530 rather '510 parts. Compare the capacitance, Ciss = 180 or 670pF, that's proportional to area and hence heat conduction. Yep, we see 3.5 vs 1.7 deg-C/watt junction-to-case thermal resistance for the original IR510 vs IR530.
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Old 23rd January 2011, 09:00 PM   #8
CBS240 is offline CBS240  United States
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Well, in addition to heat another issue is transconductance. 2 Semens is not much for an output device unless they employ higher voltage so as many can be paralelled. A look at the SOA graphs shows you Rds becomes an issue Vds<5V. I supose the 510s could be used for a power amp, but so could a thousand TO-92 J-fets. Without knowing the indended goals of the circuit we are all just generalizing and guessing.
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