iPhone charging hardware

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Good morning all,
I am currently working on a project to mount some Amateur Radio components into a motorcycle tank bag. I would like to add charging capability for my iPhone.

Space is at a premium, and I don't have room for a 12 volt car outlet and charging adapter. Part of the project is a custom PCB board, and I have room there for a USB-A port and a DC-DC converter on the board. DC-DC converter shown here: 5W DC-DC Converter

Is it OK to merely provide 5 volts to a USB-A port, or is there circuitry within phone chargers that is necessary to safely charge an iPhone battery?

Thanks,
Jeff
 
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Sounds like a fun project. I don't think there is any reason why that should not work. The charging is controlled in the iPhone, AFAIK, as you can use a simple cable to the 12 volt car outlet, any brand, to charge the iPhone. You didn't say what iPhone, or whether it has a USB-c or Lightning port, but that shouldn't make too much difference. You have the specs for USB-A, right?

BTW, I am W1HRE. Not very active these days, but I keep the license.
 

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