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Old 17th December 2008, 07:59 PM   #1
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Exclamation the perfect MOSFET

no seriously,
isnt this a near perfect MOSFET?

FDPF3860T

http://www.fairchildsemi.com/pf/FD/FDPF3860T.html

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Old 18th December 2008, 12:08 AM   #2
Eva is offline Eva  Spain
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This is a similar one

http://www.irf.com/product-info/data...ta/irf540z.pdf

Hard to beat parameters for a 100V device. I have already made amplifiers with them, I got 150W @ 4 ohm full music output without heatsink.
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Old 18th December 2008, 12:24 AM   #3
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This is undoubtedly bad news because as devices get better amplifier design gets less interesting.

w
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Old 18th December 2008, 04:38 AM   #4
IVX is offline IVX  Russian Federation
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Quote:
Originally posted by Eva
This is a similar one

http://www.irf.com/product-info/data...ta/irf540z.pdf

Hard to beat parameters for a 100V device. I have already made amplifiers with them, I got 150W @ 4 ohm full music output without heatsink.

I guess you mean irfs540z D2PAK, hence PCB is a heatsink, to220 150W@4Ohm(resistive) sine 50Hz maybe just 20sec ok and the end. BTW, nice 100V mosfet from Infineon, about 20nC and almost the same Rds_on.
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Old 18th December 2008, 05:13 AM   #5
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Default Mosfet

IRFB4212

I got 135W RMS 4 ohm load no heat sink.
They do get hot to the touch. I also have them switching at
1.35 Mhz.

For more current, The 41 Amp FDP3672 is a real dandy.
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Old 18th December 2008, 08:00 AM   #6
Eva is offline Eva  Spain
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Quote:
Originally posted by IVX



I guess you mean irfs540z D2PAK, hence PCB is a heatsink, to220 150W@4Ohm(resistive) sine 50Hz maybe just 20sec ok and the end. BTW, nice 100V mosfet from Infineon, about 20nC and almost the same Rds_on.
Read my post again. I mean rail to rail continuous music output on a circuit capable of 150W @ 4 ohms.
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Old 18th December 2008, 05:45 PM   #7
Gyula is offline Gyula  Hungary
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I think FDP2532 is also impressive, but I haven't used yet.
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Old 19th December 2008, 06:11 AM   #8
IVX is offline IVX  Russian Federation
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oh sorry, I had mistake, Infineon mosfet IPB26CN10N have even lower Rds_on(19mOhm) than IRF540Z, and 1/2 of Qg(23nC), I've tried it last summer instead of IRF540Z, that's really cool, but 540z much cheaper yet, 2.5 times if I remember correctly. Also I had experience with IXTP42N15 and IXTP56N15 from IXYS, data sheets looks great, but this stuff is unexpectedly weak, I have no idea why, but irf540z and IPB26CN10N( .2mm silpad used) no problem with 2 Ohm load +/-45VDC rails, but only not IXYS.. I've checked Rds_on it's ok, it seems Rth_die_case too high, actually IXYS Trench Gate mosfets use really small die.
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Old 19th December 2008, 06:42 AM   #9
aandy is offline aandy  United Kingdom
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all other igbts are better in the UK to Fairchildsemi
This is because there outlets are incompetent.
Just try and use them
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Old 19th December 2008, 01:53 PM   #10
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Quote:
Originally posted by aandy
all other igbts are better in the UK to Fairchildsemi
This is because there outlets are incompetent.
Just try and use them
What IGBTs do you use in your power supplies?
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