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Old 10th April 2009, 05:40 PM   #1
mix is offline mix  Romania
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Talking how many MOSFET can I connect to IRS20124

hi. I decided to build an auto amplifier.From datasheet result max load on LO and HO is 1A. I want to use 6 x IRFB4227PBF (3/rail). Somebody can tell me if IRS20124 can drive this transistors.

sorry for my bad english.
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Old 10th April 2009, 06:39 PM   #2
Eva is offline Eva  Spain
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At which frequency?

At 300Khz certainly not without buffers...
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Old 10th April 2009, 07:10 PM   #3
mix is offline mix  Romania
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at 250 Khz what buffer can I use?and how
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Old 11th April 2009, 09:50 AM   #4
mix is offline mix  Romania
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I'm not sure that this kind of buffer it work. I need a separated power suply for the buffer transistors. Now correct my mistakes
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Old 13th April 2009, 07:45 PM   #5
Eva is offline Eva  Spain
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Yes, this buffer style works. Zetex produces suitable bipolar transistors.

Using one buffer for each IRFB4227 will allow high switching frequencies.

Why do you think that you need IRFB4227 triplets instead of pairs or singles?
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Old 14th April 2009, 09:03 PM   #6
mix is offline mix  Romania
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well.. I want to use it into 1ohm load and I'm not sure that the 20124 can support the current necesary for the mosfets
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Old 15th April 2009, 02:56 AM   #7
Eva is offline Eva  Spain
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Have you designed more class D amplifiers? Yours is a quite ambitious project.
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Old 17th April 2009, 10:17 AM   #8
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Hi, mix!

it was mine 1st d class project, it would be better to replace 20124 for something new, shematic also far from state of art .
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