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Old 13th April 2012, 11:23 AM   #1901
manojtm is offline manojtm  India
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manojtm as this temperature for high power? NO IT IS COOL
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Old 13th April 2012, 08:01 PM   #1902
stewin is offline stewin  Kenya
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Originally Posted by manojtm View Post
Hi all

attaching my old design again

RGDS
manoj
can irf640 also supply 2a current for driving the ir2110 like the irfp240

Last edited by stewin; 13th April 2012 at 08:04 PM.
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Old 15th April 2012, 11:52 AM   #1903
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hi
greetings which is better gate driver ic FAN7392 OR IR2110
warm regards
andrew lebon
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Old 15th April 2012, 01:16 PM   #1904
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Default HELLO

Hi
greetings can anyone be kind enough to explain how ic IR2110 is driving 2pairs of irf250n i am posting a pic of a bridged mode amp sir irvynejay and
gerry morales have assembled this amp one pair each channel i am posting
pic of same amp but with 2 pairs each channel gateiver ic is ir2110 in both pcbs
warm regards
andrew lebon
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Old 15th April 2012, 02:20 PM   #1905
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2 pairs again single ir2110 mono channel
maybe its possible
warm regards
andrew lebon
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Old 16th April 2012, 06:16 AM   #1906
manojtm is offline manojtm  India
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Hi andrewlebon,

I think ,iam using gate driver resistor 100E(>68E) i already explain this very well, 100nC limit depends on freq. so you set your freq. 100-150KHz and add more MOSFET(x3);200-250KHz (X2) 300-450KHz (X1)
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Old 16th April 2012, 10:05 AM   #1907
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Hi Manojtm
greetings thanks for reply so many variations in d class just reading pcb of d class 6 pairs irf4227 only 1 ic for gain 8 pin rest all discrete no other ic 4200 watts each designer has his own method
warm regards
andrew lebon
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Old 19th April 2012, 09:14 AM   #1908
manojtm is offline manojtm  India
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Hi andrewlebon,

Simple sigma-delta method class D 93% Eff. for 400W 8R load (fsw=450KHz) +75V -75V Supply.
RGDS
Manoj
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Old 20th April 2012, 09:02 AM   #1909
luka is offline luka  Slovenia
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god, when people will find out, there are other fets then irfp250's... they will **** bricks
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Old 20th April 2012, 03:19 PM   #1910
stewin is offline stewin  Kenya
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god, when people will find out, there are other fets then irfp250's... they will **** bricks
hi luka . lucky for me there are irfb4229 ,irfp4229 irfb4227 and irfp4227 now available locally, if it was not for GOD's blessings and favour maybe i'll be numbered among the bricks ****** . will buy them and try them out.

Last edited by stewin; 20th April 2012 at 03:22 PM.
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