irf9610 matching and manufactures

dhole · 5th January 2005, 12:51 PM

Hi there People

Ive spent this afternoon matching up some irf9610 chips I picked. Up I was unfortunate enough to pick up a mixed bag although it was cheap . I am in the uk so £.80 each was good. The chips are mainly manufactured by SEC (14) and IR (6) . I havent had a problem matching and have a few sets of 3 . I am curious though about the manufacturer who I havent heard of . I am also curious about the vgs results which seem higher than I expected. They average 3.79v using a 1k resistor and a 15v psu as per Mark Finnis's pdfs on his aleph 4 . I dont have a problem it seems but I would be interested to know if the chips are any good in comparison to IR's ?
regards
dave

dhole · 5th January 2005, 12:54 PM

should i say that the SEC chips average 3.79 vgs and the IR 3.31.

Nelson Pass · 5th January 2005, 06:05 PM

It varies from batch to batch even within a manufacturer.

dhole · 5th January 2005, 07:23 PM

I had guessed . But SEC as a company they are known I presume and make quality components ?

dave

yldouright · 5th January 2005, 07:46 PM

Mr. Pass has indicated in earlier posts that matching the 9610 pair is better done in the circuit than out. Has anything changed since that post reference Mr. Pass? I also would like to know where to place in my standy switch circuit in order to have it draw only 3W like on your XA100 :?)

lgreen · 6th January 2005, 06:10 AM

I believe SEC is Samsung Electronic Components or something like that. Subsequently got sold to Fairchild I think. Should be good quality.

wrenchone · 6th January 2005, 06:35 AM

SEC is definitely Samsung - OK quality, but IR, Siliconix, GE/Harris, Motorola/On are most likely better. However, the components thatyou have are always better than the mythically perfect, unobtainable components that you don't have.... One thing to note, though, is that Nelson Pass documented a kink in the transfer function of N-Channel IR parts that doesn't seem to happen in parts from other manufacturers. If I remember correctly, it doesn't happen with P-Channel parts, so you should be in the clear with the parts you have from either SEC or IR.

5th January 2005, 12:51 PM	#1
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	irf9610 matching and manufactures Hi there People Ive spent this afternoon matching up some irf9610 chips I picked. Up I was unfortunate enough to pick up a mixed bag although it was cheap . I am in the uk so £.80 each was good. The chips are mainly manufactured by SEC (14) and IR (6) . I havent had a problem matching and have a few sets of 3 . I am curious though about the manufacturer who I havent heard of . I am also curious about the vgs results which seem higher than I expected. They average 3.79v using a 1k resistor and a 15v psu as per Mark Finnis's pdfs on his aleph 4 . I dont have a problem it seems but I would be interested to know if the chips are any good in comparison to IR's ? regards dave

6th January 2005, 06:10 AM	#6
lgreen diyAudio Member Join Date: May 2003 Location: San Diego, USA	SEC I believe SEC is Samsung Electronic Components or something like that. Subsequently got sold to Fairchild I think. Should be good quality.

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5th January 2005, 12:54 PM	#2
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	should i say that the SEC chips average 3.79 vgs and the IR 3.31.

5th January 2005, 06:05 PM	#3
Nelson Pass The one and only Join Date: Mar 2001	It varies from batch to batch even within a manufacturer.

5th January 2005, 07:23 PM	#4
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	I had guessed . But SEC as a company they are known I presume and make quality components ? dave

5th January 2005, 07:46 PM	#5
yldouright diyAudio Member Join Date: Aug 2002 Location: New York, NY	Mr. Pass has indicated in earlier posts that matching the 9610 pair is better done in the circuit than out. Has anything changed since that post reference Mr. Pass? I also would like to know where to place in my standy switch circuit in order to have it draw only 3W like on your XA100 :?)

6th January 2005, 06:35 AM	#7
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	SEC is definitely Samsung - OK quality, but IR, Siliconix, GE/Harris, Motorola/On are most likely better. However, the components thatyou have are always better than the mythically perfect, unobtainable components that you don't have.... One thing to note, though, is that Nelson Pass documented a kink in the transfer function of N-Channel IR parts that doesn't seem to happen in parts from other manufacturers. If I remember correctly, it doesn't happen with P-Channel parts, so you should be in the clear with the parts you have from either SEC or IR.

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