Nice MOSFETs for class D from IR (or how they try to impose us the DirectFet thrash) - diyAudio
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Old 17th November 2007, 11:45 AM   #1
Eva is offline Eva  Spain
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Default Nice MOSFETs for class D from IR (or how they try to impose us the DirectFet thrash)

This is is a list of recent IR parts rated at 150V or more (also one 100V) and suitable for high-power high-performance class D.

Format of the list:
-----------------------
name - Vds - Id@25C - Rds-on(typ.) - Qg(typ) - Qrr(typ)


DirectFet parts:
-----------------------
IRF6775 150V 28A .047ohm 25nC/164nC
IRF6643 150V 35A .030ohm 39nC/190nC
IRF6785 200V 19A .085ohm 26nC/190nC
IRF6641 200V 26A .051ohm 34nC/320nC


TO-220 parts:
-----------------------
IRFZ48V 100V 36A .021ohm 42nC/41nC
IRFB4019 150V 17A .080ohm 13nC/160nC
IRFB4321 150V 83A .012ohm 71nC/300nC
IRFB4020 200V 18A .080ohm 18nC/280nC
IRFB4227 200V 65A .020ohm 70nC/430nC
IRFB4233 230V 56A .031ohm 120nC/760nC
IRFB4229 250V 46A .038ohm 72nC/840nC
IRFB4332 250V 60A .029ohm 99nC/820nC


Note how those damn $%&$%&$&/$"%"$ are trying to impose us their DirectFet thrash by releasing the most suitable parts for class D only in this non-standard and unreliable format. The TO-220 parts are either too weak or too heavy. This is a big leap backwards in reliability and power handling.

Does anybody know of any 150V and 200V "medium sized" TO-220 parts from IR competitors with low gate and reverse recovery charges?

I only know these from Fairchild:

TO-220
--------------------
FDP2572 150V 29A .054ohm 26nC/169nC
FDP2552 150V 37A .036ohm 39nC/242nC
FDP2532 150V 79A .016ohm 82nC/327nC

Power-56 (oh no!! more custom package trash??)
---------------------
FDMS2672 200V 20A .077ohm 30nC/238nC

Those 150V parts from Fairchild are really nice, and they also have nice 100V parts:

TO-220
---------------------
FDP3682 100V 32A .032ohm 19nC/90nC
FDP3652 100V 61A .014ohm 41nC/45nC
FDP3632 100V 80A .008ohm 84nC/120nC


I hope this information to be useful, since I see too much class D made with stone age MOSFETs and ultra slow body diodes.
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Old 17th November 2007, 11:59 AM   #2
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How about IRF3415 ?
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Old 17th November 2007, 12:01 PM   #3
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Evita you seems to be very fascinated from the specs offered by DirectFets but at the sametime you are equally frustated that these specs are not available in your favourite TO-220 packages....
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Old 17th November 2007, 12:07 PM   #4
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Quote:
Originally posted by darkfenriz
How about IRF3415 ?

I think this also the same Stone-Age Mosfet
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Old 17th November 2007, 12:21 PM   #5
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I have to agree with eva, but thats because i hate smd.
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Old 17th November 2007, 12:21 PM   #6
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Quote:
Originally posted by Workhorse
Evita you seems to be very fascinated from the specs offered by DirectFets but at the sametime you are equally frustated that these specs are not available in your favourite TO-220 packages....
This is unfair marketing policy. They make the best dies available in a custon package to force you to migrate to a platform that can't be later replaced by anything else from competitors. Fortunately we have the 150V Fairchilds in TO-220 and these are very good too.


Quote:
Originally posted by Workhorse

I think this also the same Stone-Age Mosfet
Indeed!!
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Old 17th November 2007, 12:25 PM   #7
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Quote:
Originally posted by Tekko
I have to agree with eva, but thats because i hate smd.
SMD is cool when you don't have to deal with high voltages, high currents, high powers, PCB bending, thermal cycling, etc... SMD is great for signal processing and logic stuff.
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Old 17th November 2007, 12:32 PM   #8
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And its a PITA to solder without expensive pick and place machines and soldering equipment.
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Old 17th November 2007, 12:51 PM   #9
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Quote:
Originally posted by Tekko
And its a PITA to solder without expensive pick and place machines and soldering equipment.
There are SMD packages like 0805, 1206, SOD-80, SOT-323, SO-x and similar that are quite easy to solder and unsolder with traditional methods, provided that you aren't too jerky, of course
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Old 17th November 2007, 01:48 PM   #10
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ive tried to solder smd, totally impossible either too much solder, too little solder or component not properly placed.


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