Tool/software:
I am looking to design two similar boards using the TPS25751, shown below.
I have read through the datasheet of the IC, and I think I understand how the wiring works for the power etc, but I am still a bit unsure as to how setting up the USB data communications would work.
The first board is the simpler of the two. It needs to take in 5V 3A from a wall power supply to charge an iPad, and have a headset connection for the iPad.
1. Am I able to just connect the USB audio device's D+/D- lines to the port going to the iPad (USB-C Female #2)?
2: In this scenario I am not using USB-C PD, just 5V 3A, is there a more basic IC that can accomplish what I am trying to do here (Power: Source, Data: UFP)?
Looking on the TI website, it seemed like there were only PD chips that could act as a Source while being a UFP.
The second board is similar to the first, but the iPad is powered from a 12V barrel jack, and it also needs the option to connect the iPad to a PC for file transfer etc.
I figured this might be possible by using a USB 2.0 Multiplexer, where the iPad could swap between connecting to the PC and the USB Audio IC via a physical switch on the board, or an MCU GPIO.
3: Is it feasible to swap what the iPad is connected to, changing USB-C Female #2 between being a UFP for the USB Audio IC and a DFP for the Computer? If so, how? Would the MCU send data to the PD controller, or control its GPIO to accomplish this?
Let me know if there is any other info I can provide for clarification.
Thanks,
Matt