3xOPA548 on 35vDC+/-?

kinser · 11th December 2005, 11:33 AM

Hi all,

So i have finished my 2 channle OPA541 amp for my main speakers!

Now i want to make a 3 channle amp for my rear and center speakers.
So i figured OPA548 becuase i dont have any 541's left and all i have is a 250va 25-0-25 trafo. ive searched the forum a couple of times but ddnt find out what voltage these little chips should run at or whats the max they can take.
So if someone knows, can i run 3 of them at 35vDC +\-? and if not then what is the recomended voltage?

Thanks,
Kinser

abid_rehan · 11th December 2005, 11:49 AM

It is always better to have a look at datasheet of any chip under considertion.
OPA548 Data sheet suggests an operating voltage of 8 to 60, which in dual supply mode would be +/- 4 to +/- 30 volt, so i think u better give thse chips recomended supply +/-35 i think that may blow the chips.

kinser · 11th December 2005, 12:04 PM

Thanks,
I just ddnt know what source to belive
do you think i could use a couple of regulators to bring the voltage down?
Thanks,
Kinser

11th December 2005, 11:33 AM	#1
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	3xOPA548 on 35vDC+/-? Hi all, So i have finished my 2 channle OPA541 amp for my main speakers! Now i want to make a 3 channle amp for my rear and center speakers. So i figured OPA548 becuase i dont have any 541's left and all i have is a 250va 25-0-25 trafo. ive searched the forum a couple of times but ddnt find out what voltage these little chips should run at or whats the max they can take. So if someone knows, can i run 3 of them at 35vDC +\-? and if not then what is the recomended voltage? Thanks, Kinser

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11th December 2005, 11:49 AM	#2
abid_rehan diyAudio Member Join Date: Mar 2007	It is always better to have a look at datasheet of any chip under considertion. OPA548 Data sheet suggests an operating voltage of 8 to 60, which in dual supply mode would be +/- 4 to +/- 30 volt, so i think u better give thse chips recomended supply +/-35 i think that may blow the chips.

11th December 2005, 12:04 PM	#3
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	Thanks, I just ddnt know what source to belive do you think i could use a couple of regulators to bring the voltage down? Thanks, Kinser

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