Other Parts Discussed in Thread: TPA3255, , TPA3255-Q1
I have two more questions regarding the TPA3255 and TPA3255EVM.
1. The TPA3255EVM has a 12V regulator for VDD, but the datasheet shows an absolute max rating of 11.4V and typical of 10.6. My circuit will have a 12V (out) DC-DC converter and to get a clean VDD, I was going to use a low-dropout linear regulator and regulate to 10.6V. Can you explain why the EVM uses 12V and would it be better to regulate to 10.6V as I planned to do?
2. I'm not sure I fully understand the input side of the RESET control (U7 of the TPA3255EVM). It looks like because of the low current draw they use a resistive divider to set the Vin to around 4V (slowed down by caps C84 and C67), but what exactly is the intention of the PVDD, R6, C83, C84, intended to do?