Posted on July 13, 2015 at 04:50 Hi Carlos ,
yes , you need to consider music output power ,since it will be quite important for your heatsink design , if the supply voltage was higher , the dissipation power will be higher, then you need a much bigger heatsink .
for your application, you need to drive 8 pcs of amplifier from standby/mute votlage divider , maybe the resistor voltagae divider could not to provide enough current with current value (as fig 12) , you may need to reduce the resistor value , but maintain the voltage dividing ratio . and the acutally value should be verified in your prototype.
or you can use LDO (TO92 package is enough )to proivde standby/mute voltage refer to +VCC.
Thanks to consider ST device
YT
