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Class D Switching Power Amplifiers and Power D/A conversion

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Old 16th November 2012, 12:50 PM   #2881
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Hi Manoj
greetings this is only a clipping indicator for 78 volt operation maybe some mods needed havent tried it are you using limiter for your d class
warm regards
andrew lebon
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Old 16th November 2012, 02:02 PM   #2882
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Quote:
Originally Posted by manojtm View Post
Hi andrew,

thanks for replay

can i use +75v supply for +HV line

Regards
MANOJ
Clip circuit will work without any adjust from +35v to +115v rail voltage.
Regards
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Old 17th November 2012, 09:33 AM   #2883
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Hi guys
can i use axial capasitors for class D ?
i want use this type of capasitor for sir Manoj amp (AUD600).
range is :
1uF / 250V
470nF / 250V
1nF / 250V

thanks
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Old 17th November 2012, 12:22 PM   #2884
manojtm is offline manojtm  India
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Quote:
Clip circuit will work without any adjust from +35v to +115v rail voltage.
Regards
Hi apex

thanks for your replay. i need only a simple clip indication circuit.thanks for your good and simple indicator circuit.

Hi,Hadi
you can use axial type but pad length will not match.you have to edit size

regards
MANOJ
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Old 17th November 2012, 01:52 PM   #2885
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Default thanks to sir manoj

Quote:
Originally Posted by manojtm View Post
Hi apex

Hi,Hadi
you can use axial type but pad length will not match.you have to edit size

regards
MANOJ
Hi sir manoj
i need you dsigne file beacuse i want to do match my component with your PCB board.
i can use polyster too.
wich one is beter?
polyster or axial ?
can i use polyster capasitor without reduce sound quality?
thanks
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Old 17th November 2012, 08:34 PM   #2886
stewin is offline stewin  Kenya
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hi manoj i want to use irfp260 as outputs . will it work?
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Old 17th November 2012, 09:59 PM   #2887
stewin is offline stewin  Kenya
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hi manoj your amp layout is amazing . will the protection go on if i use low impedance like a 1ohm load from +/-27 to +/-88vlts . or simply will the protection work with high and low voltage without adjusting any components?
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Old 18th November 2012, 08:21 PM   #2888
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T106-2

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Old 18th November 2012, 08:30 PM   #2889
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Default original T106-2

original T106-2

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Old 19th November 2012, 05:41 AM   #2890
manojtm is offline manojtm  India
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Quote:
will the protection go on if i use low impedance like a 1ohm load from +/-27 to +/-88vlts . or simply will the protection work with high and low voltage without adjusting any components?
Hi, stewin,

using 27V supply 6A for 2 ohms 75V supply 16.6A for 2 ohms and 88V supply 19.5A for 2 ohms so you should adj. the sensing components
Over current (I) = 550mv/0.04 Ohm x 1k5+1k/1k = 34A (not for IRFP250 its for IRFB4227)
so you need to adjust resistor value to get 23A for peak current(75V supply) and 27A for 88V supply.
I = 13.75 x 1.5K+2.2K/2.2K = 23A change resistor value 1K to 2.2K to set 23A and 1K to 1.5K to set 27A
and for low supply like 27v only connect resistor 1.5K OC will be @13A

Regards
Manoj

Last edited by manojtm; 19th November 2012 at 05:50 AM.
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