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Class D Switching Power Amplifiers and Power D/A conversion

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Old 12th September 2010, 09:33 AM   #11
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So Pafi,

What power supply do you suggest?
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Old 12th September 2010, 09:46 AM   #12
Pafi is offline Pafi  Hungary
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As I said, if somebody can't answer to this trivial question, I don't recommend him to build anything. I think Mathematics of elementary school is a neccessary knowledge. Or at least a minimal common sense.

In your schematic the LM319 limits the power supply to +/-18 V, you can't use more.

Last edited by Pafi; 12th September 2010 at 09:50 AM.
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Old 12th September 2010, 09:48 AM   #13
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TAS5162 doesnt seem to be available in around here. So i prefer to go discrete.
IR2110 and other controllers are supposed to be inverter spare parts and are easily available.

Can somebody suggest a transformer power supply capable of providing 100W and 250W into 4E?
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Old 12th September 2010, 09:51 AM   #14
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See, first of all, i am taking suggestions and opinions.
And according to me, 20V rms (28V peak) into 4 ohms is 100W power.
But still i would like to hear suggestions about changing the power supply.
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Old 12th September 2010, 10:17 AM   #15
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I am posting it here because i am ready to take suggestions from experienced people and modify the schematic accordingly. I understand that I need a level-shift from -18V of the LM319 to use higher power supplies.

Somebody help me.....
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Old 12th September 2010, 11:14 AM   #16
AP2 is offline AP2  Italy
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Quote:
Originally Posted by newvirus2008 View Post
I am posting it here because i am ready to take suggestions from experienced people and modify the schematic accordingly. I understand that I need a level-shift from -18V of the LM319 to use higher power supplies.

Somebody help me.....
Hi, I think this can help you.

Regards
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Old 12th September 2010, 11:19 AM   #17
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Thanks. I m through it. But i dont recognize the BJTs. Any substitutes?
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Old 12th September 2010, 11:22 AM   #18
AP2 is offline AP2  Italy
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Quote:
Originally Posted by newvirus2008 View Post
Thanks. I m through it. But i dont recognize the BJTs. Any substitutes?
Hi,
yes, I tested 2N5401 and complementary, it is good.
level shifter is very good.
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Old 12th September 2010, 11:43 AM   #19
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thanks AP2. i think i can get 2N5401 around. caught hold of a spice model for now.
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Old 12th September 2010, 05:50 PM   #20
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Quote:
Originally Posted by newvirus2008 View Post
See, first of all, i am taking suggestions and opinions.
And according to me, 20V rms (28V peak) into 4 ohms is 100W power.
But still i would like to hear suggestions about changing the power supply.
indeed i did make a stupid mistake there 28v peak into 4 ohms is 100W.
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