I have to say I am unimpressed with ST's tech support (there is none: they just referred me to the forums). And when I selected the 'Analog and audio' group, I couldn't post there as it was 'read-only'!! If there's a more appropriate product forum I *can* post to, please advise.
Anyway, here goes with my request for help...
Re: TDA7498E (Class-D audio amplifier)
This device appears to be an old product, though apparently still in production. Is there a more recent similar device available? Is there likely to be a GaN version released anytime soon?
The datasheet for this device shows that there are two 3.3V output pins (VDDPW, VDDS), and these supplies are maybe used internally. But nowhere in the datasheet is a specification for the maximum current available to be drawn externally from either of these 3.3V outputs!
This also raises the question of why the AN4015 application note includes an *external* 3.3V low-current supply. Why, if this voltage is available from the device pins?
Also, regarding the DIAG pin, when/what does it output?
