I'm designing this board based on ESP32 which suppose to handle two motor drivers (DRV8874, DRV8840) and a few other modules; a 12V@3A DC adapter seems to suffice powering-up the board according to my calculations. The idea here was to have only one power source to the whole board, even the CP2102A USB_to_UART and ESP32 could both be only powered up via the DC adapter instead of USB port (which a common design in dev-boards is that the 5V on VBUS gate of the MicroUSB goes through a 3.3V voltage-regulator and forms the 3.3V net to eventually supply the VDD on both CP2102A and ESP32 module).
Have I missed anything here? any possible safety issues with the current design? was cutting the power from the MicroUSB's VBUS to the USB_to_UART's VDD and supplying from an external DC source a bad idea? Thanks.