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Old 21st September 2012, 04:48 PM   #2551
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Hi andrewlebon which is better to used?totem pole BD139 & BD140 OR TC4420 for 3 pair's of IRFP260 with 47R gate resistor cause i dont have distortion meter for measurement,thank's bhai.
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Old 21st September 2012, 07:16 PM   #2552
exflaco is offline exflaco  Armenia
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Tanks Nano and Andrew
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Old 21st September 2012, 11:39 PM   #2553
CPX is offline CPX  Romania
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sandeep kayarkar: What core is that(dimensions).
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Old 22nd September 2012, 12:06 AM   #2554
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Hi Don2007ksa
greetings TC4420 didnt work try bd139 140
warm regards
andrew lebon
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Old 22nd September 2012, 12:12 AM   #2555
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Quote:
Originally Posted by andrewlebon View Post
Hi Don2007ksa
greetings TC4420 didnt work try bd139 140
warm regards
andrew lebon
Why didnt it work ?

I use tc4420 with irfb4227's and have no problems.
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Old 22nd September 2012, 12:22 AM   #2556
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Default tc4420

Hi Nigel
greetings TC4420 assembled faint hissing sound is there in output
havent tried it out on full power maybe this weekend i try it out
warm regards
andrew lebon
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Old 22nd September 2012, 12:30 AM   #2557
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Default CORE SELECTION

Hello
greetings which is best suitable core for d class for power output 2kw to 3kw got some sendust cores from china sound has become clearer no heating
of core and fets lukewarm but after some time fets and ir2110 blow up
any reason for this happening for tests i used irfp250 2 pairs supply 70 volts dc+/- any clue why this is happening
warm regards
andrew lebon
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Old 22nd September 2012, 12:41 AM   #2558
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Quote:
Originally Posted by nigelwright7557 View Post
Why didnt it work ?

I use tc4420 with irfb4227's and have no problems.
TC4420 worked with how many pairs?
how do you explain that not work with pci TC4420 and worked with bds.
TC4420 in my test only worked well with a pair. use 2 pairs of IRFP260N as is?


Nano.
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Old 22nd September 2012, 12:45 AM   #2559
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Hi Nano
greetings i used 3 pairs irfp260n with tc4420 but i try your bd139 bd140 totem today easier to get and cheaper hope it works out
warm regards
andrew lebon
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Old 22nd September 2012, 12:55 AM   #2560
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Hi andrewlebon beauty. Now next step is to test IR2110 totem with BD139, 140
03 pairs IRFP260N.
Nano.
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