I know that USB-C splitters don't follow the USB spec, but I have an use case where I actually need to run one cable, but get two USB-C cables out. Neither will have data, but they will have power, however, not Power Delivery.
I have a 15.6" touch screen that has a female USB-C port named "PD". There is no spec on the port (because cheap and no-name), but the screen only takes 5v (confirmed). The other USB-C port on the monitor takes data + video. If I connect my phone, it will:
- Power the screen @ 5v
- Power phone @ 9v
- Receive video from phone
- Send touch input to phone
I want to run 1 cable into an Y-splitter, however, it should only output 5v. The screen takes 5v and all my other USB-C gadgets (Raspberry Pi) take 5v minimum as well. I could make an Y-splitter (I actually did), however, the screen will not power on, unless it negotiates with the charger.. even though it runs at 5v.
What options do I have? I want to run 1 cable, power the screen (at 5v but via PD), and power a device with 5v (PD or no PD - does not matter). The plugs I use to make USB-C things are these:
