Gentlemen,
Curious to know if someone has tried LM3886 in an amplifier with output in Class-G topology??
If so, can someone share the schematic ?
Regards,
Curious to know if someone has tried LM3886 in an amplifier with output in Class-G topology??
If so, can someone share the schematic ?
Regards,
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In this thread, someone discussed the same:
G-class with LM3886
It seems like this is the wrong chip to use for Class H/G (whatever the difference is.) The chip is made for Class AB designs and is most efficient in that config. You cannot actually make it a class G (H?) amp because this is an integrated amplifier chip.
G-class with LM3886
It seems like this is the wrong chip to use for Class H/G (whatever the difference is.) The chip is made for Class AB designs and is most efficient in that config. You cannot actually make it a class G (H?) amp because this is an integrated amplifier chip.
Its not about making Class G only with LM3886 chips but utilizing LM3886 as Inner Power device and additional Output/Mosfet as outer power device.
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Output Current Limit 7A (tipical 11,5A ) LM3886 datasheet(3/20 Pages) NSC | Overture TM Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute
Cannot be exceeded by the top stage. You will have to use a high load resistance of 16 ohms or more. There will be no gain in power output.
It will take a parallel connection of several IMS to obtain the required current.
Cannot be exceeded by the top stage. You will have to use a high load resistance of 16 ohms or more. There will be no gain in power output.
It will take a parallel connection of several IMS to obtain the required current.
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Correct. 3886 cannot be used, but TDA7294 can. Because the output stage is NOT directly connected internally on the ST part and can be separately powered by the class G switching circuit. If TI were to *make* a 3886 with the collectors of the output stage separately pinned out, you could do something like this. As fas as I know, no such animal exists yet.
I can only imagine variable voltage supply to the entire 3886 will just cause immense crossover distortion as the auto adjustment circuitry tries its damn hardest to keep up.