I'm working on building a Class D Amplifier (TPA3122), and from what I understand, you want to connect the grounds of the amplifier using a star connection. On this circuit, I plan on using a DC-DC converter to power some other components (Logic IC's, LED, Isolated Bluetooth Module). So I wanted to still use a ground plane for the converter since I would need it to ensure that there isn't a large amount of inductance in my ground path.
So would it be acceptable to design a Class D amplifier, connecting the amplifier's ground using a star connection, while connecting the DC-DC converter's ground using a ground plane? Side note, I plan on using a DC-DC converter IC (haven't selected a part yet) to regulate an output voltage of 5V, and using another converter to isolate the 5V supply (CRE1S0505S3C) to power the Bluetooth module (generic bluetooth module from Amazon).