Other Parts Discussed in Thread: TPS2546, TPS2547, TPS2514A, TPS65987DDK
I'm working on a new USB charging product to be installed on airplanes. I understand the power requirements well enough: it has to take 12V-32V input and be able to provide up to 45W of power per output with >95% efficiency. I'm looking into a GaN FET buck converter for that part.
What I really need help with is understanding which USB controller IC to use. We want to be able to have a USB-C only option, and an option with USB-C and USB-A. Maybe a dual USB-C output option as well.
While researching this, I found the reference design PMP40543, which uses the same nominally USB-C controller chip for both the USB-C and the USB-A output.
The idea of using a USB-C controller for the USB-A output appeals to me because it would allow me to use a dual-port USB-C controller, like the TPS65988DK, for both the USB-C and USB-A outputs simultaneously.
What are the requirements and restrictions when configuring a USB-C controller IC for a USB-A output? Could the TPS65988DK be configured for one USB-C output and one USB-A output? I need to understand what we can and can't do to make an informed decision for the direction of this project.
If anyone can provide insight into this aspect of USB charger design, I would greatly appreciate it. Thank you.