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Old 22nd September 2003, 07:08 PM   #1
sam9 is offline sam9  United States
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Default MOSFET Output Pair Suggestions ??

I've made a couple of small BJT amps in the low power range (15V-30V) and I thinking about doing something similar using MOSFETs in a SF configuration. Physical size is a factor so I'm looking for a TO-220 package. Scanning the usual catalogs (DMgikey, Mouser, etc) it is hard to figure out what would constitute a complimentary pair.

Any suggestions in this regard? Naturally it would be nice if they were readily available.
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Old 22nd September 2003, 07:17 PM   #2
PMA is offline PMA  Europe
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IRF540/9540
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Old 22nd September 2003, 07:53 PM   #3
DrG is offline DrG  South Africa
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In your specified voltage range IRF510 / IRF9510 would probably suffice.
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Old 22nd September 2003, 09:08 PM   #4
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I would 2nd PMA's suggestion.

My experience with those mosfets tho. is that they are not very stable in anything other than an EF-equivalent set-up.

Other than that, those are great output devices, impossible to blow-up, .

BTW, those aren't complimentory pairs. The Hitachi pair is but they are expensive.
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Old 23rd September 2003, 12:17 AM   #5
blmn is offline blmn  Brazil
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As millwood said, they are not complimentary. For example, different gate capacitances must be considered during the design.

regards
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Old 23rd September 2003, 01:07 AM   #6
sam9 is offline sam9  United States
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Thanks for the input. I found SPICE models at the DuncanAmp website, so I will be working with those for a while. At least then I will have some idea what the likelyhood of getting ssomething satisfactory will be.
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