USB Charger Port Design

Apr 07, 2019 3 Replies

I need to add a dedicated USB charger port to a product (no data).



After looking into USB charging standards I realize what a mess awaits me.



There are dedicated USB charger controllers out there like TIs TPS2511.



Has anyone experience with this? I am doubting that I can create a charger that is all things to all devices. For example Apple will charge at 2.4A with certain voltages on the data lines but I don't see a controller that do it.



Rich


That lets you provide 10W charging, which is not a slouch.

Thanks, - Win

I'm assuming you're making a charger.

There's that new standard "USB Power delivery" championed by Qualcomm and some others, my laptop and my phone both use it.

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Are you prepared to provide 100W on that port?

Those with legacy devices can use adapter cables, which should be available from OEMs or 3rd parties if there is a demand...

When I tried casting out nines I made a hash of it.

Especially for an iPhone, since Apple only provided 5W chargers with them until recently. Best I've seen is Qualcomm Quickcharge compatible which charge a phone really fast and many phones have it. But even that's a mess, other manufacturers follow similar methods, but it's their own standard and chargers, not an open standard. IDK what it costs for a QC compatible IC or where to get them, but Qualcom would.

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