Hello guys,
I'm working on a new version of Taurus, that will have a few more components and will use the LM3886 instead of the LM3875. The datasheet suggests using a 0.7uH coil in parallel with a 10Ohm resistor, all in series with the load, so it will prevent HF oscillations due to the inherent capacitance of very long cables. I figured that a air core coil having 7 loops 8mm diameter of 23AWG wire would do. But what wattage the resistor should have? Is 1/8W ok? Or should be 1/4W or even 1/2W, on the safe side?
Also, the datasheet suggests a capacitor Cc of 220pF to eliminate HF induced radiation. Is it OK to use ceramic for this?
Also, I'm planning to add a crowbar to protect the speakers against DC current case the LM3886 fails, but I want it to be simple since I don't have much board space. Is it a good idea to use DIAC-TRIAC crowbars for this?
I'm working on a new version of Taurus, that will have a few more components and will use the LM3886 instead of the LM3875. The datasheet suggests using a 0.7uH coil in parallel with a 10Ohm resistor, all in series with the load, so it will prevent HF oscillations due to the inherent capacitance of very long cables. I figured that a air core coil having 7 loops 8mm diameter of 23AWG wire would do. But what wattage the resistor should have? Is 1/8W ok? Or should be 1/4W or even 1/2W, on the safe side?
Also, the datasheet suggests a capacitor Cc of 220pF to eliminate HF induced radiation. Is it OK to use ceramic for this?
Also, I'm planning to add a crowbar to protect the speakers against DC current case the LM3886 fails, but I want it to be simple since I don't have much board space. Is it a good idea to use DIAC-TRIAC crowbars for this?