the perfect MOSFET

dead rat · 17th December 2008, 07:59 PM

no seriously,
isnt this a near perfect MOSFET?

FDPF3860T

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

Eva · 18th December 2008, 12:08 AM

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.

wakibaki · 18th December 2008, 12:24 AM

This is undoubtedly bad news because as devices get better amplifier design gets less interesting.

w

IVX · 18th December 2008, 04:38 AM

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.

stocktrader200 · 18th December 2008, 05:13 AM

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.

Eva · 18th December 2008, 08:00 AM

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.

Gyula · 18th December 2008, 05:45 PM

I think FDP2532 is also impressive, but I haven't used yet.

IVX · 19th December 2008, 06:11 AM

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.

aandy · 19th December 2008, 06:42 AM

all other igbts are better in the UK to Fairchildsemi

This is because there outlets are incompetent.
Just try and use them

megajocke · 19th December 2008, 01:53 PM

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?

17th December 2008, 07:59 PM	#1
dead rat diyAudio Member Join Date: Sep 2008	the perfect MOSFET no seriously, isnt this a near perfect MOSFET? FDPF3860T http://www.fairchildsemi.com/pf/FD/FDPF3860T.html

18th December 2008, 12:08 AM	#2
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	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 use to feel like the small child in The Emperor's New Clothes tale

18th December 2008, 05:13 AM	#5
stocktrader200 diyAudio Member Join Date: Jan 2008	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.

19th December 2008, 06:11 AM	#8
IVX diyAudio Member Join Date: Jul 2003 Location: Everywhere (Buddhist's context)	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. __________________ Best regards, E1.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

18th December 2008, 12:24 AM	#3
wakibaki Banned Join Date: Jan 2008 Blog Entries: 2	This is undoubtedly bad news because as devices get better amplifier design gets less interesting. w

18th December 2008, 05:45 PM	#7
Gyula diyAudio Member Join Date: Feb 2004 Location: Kunszentmárton, Hungary	I think FDP2532 is also impressive, but I haven't used yet.

19th December 2008, 06:42 AM	#9
aandy diyAudio Member Join Date: Mar 2007 Location: in UK unfortunatly	all other igbts are better in the UK to Fairchildsemi This is because there outlets are incompetent. Just try and use them

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
BiCMOS Bipolar+MOSFET better than MOSFET	lineup	Solid State	5	8th December 2009 11:46 AM
The 'Perfect' Box	wiredmonkey	Multi-Way	6	12th May 2008 11:17 PM
What is bit perfect?	fmak	Digital Source	39	9th May 2005 07:49 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read