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Class D Switching Power Amplifiers and Power D/A conversion

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Old 7th January 2005, 10:43 PM   #11
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It is, but its the newer version, there is no S64AMI in it,

My next step will be to duplicate this,
Electronic engineer for automotive market.
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Old 8th January 2005, 12:30 AM   #12
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Not sure I'd bother, don't forget, this version was discontinued as well!

I dont' think it is self oscillating either, they seem to be using a relaxation oscillator to generate the clock signal, and so I'd consider it inferior, for alot of reasons.

They're using higher drive voltages this time, yay.

I see little point to the transistors placed on the outputs of the IC driver as well, it would seem to negate the benefits of using the driver to begin with. All you need after it is a resistor with reverse diode to speed turn off.
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Old 8th January 2005, 02:03 AM   #13
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Hi, what do you think of using half the S64AMI (op amp inputs and comparator right thru the first Schmitt trigger) with the half bridge driver of the previous schematic?
I cant hang off of this, i would like to build the simplest D amp ever with some decent power output, but with a narrow bandwidth to drive a subwoofer.

The S64AMI that i have reversed wont work until i get all the values of the components right. I have re-assembled the circuit with new components as it was, it wont fire at all.

What do you think of my idea to use the pre driving/oscillator with the IR2111 ?
I do think they have put some transistor on the outputs to enhance the curent drive and/or to isolate the IR from the mosfets?

Sorry if it looks like i have hacked this thread...
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