softstart on bpa?

[Arx]

what would be the effect of putting a softstart on each chip on a bpa circuit (using the mute pin)? It does input muting, correct? If so, I guess the outputs would fight until all the amps came up.

would sharing a capacitor make them close enough, or is it best just to leave them out?

-Nick

[Leolabs]

Sharing the same muting circuit would be nice.

[AndrewT]

Hi,
soft start is the term usually applied to reducing the start-up current in a mains transformer.

Do you mean applying a delay to the mute/unmute pin?
So that the amp and surrounding circuits have time to stabilise before sending a signal to the speakers?

I would couple a resistor to each mute pin and then connect the other end of all the resistors together. Applying voltage or ground to the resistor junction will mute/unmute all the chipamps simultaneously.

[Arx]

Originally posted by AndrewT
Hi,
soft start is the term usually applied to reducing the start-up current in a mains transformer.

Do you mean applying a delay to the mute/unmute pin?
So that the amp and surrounding circuits have time to stabilise before sending a signal to the speakers?

I would couple a resistor to each mute pin and then connect the other end of all the resistors together. Applying voltage or ground to the resistor junction will mute/unmute all the chipamps simultaneously.

Well, it's a little more than just a delay, since as I understand it, it will unmute gradually as a capacitor voltage climbs and the current starts to flow out of the mute pin.

I'll probably just tie them all to V- with a resistor, since that seems like the safest option.

-Nick