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Forums › Desktop computing › USB C Power Delivery Issues
MikeAqua

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#290405 9-Nov-2021 15:13
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I have an HP ProBook with USB-C power input.  It accepts power from the monitors, at work (Philips) which incorporate a USB-C hub.  

 

I bought this USB-C hub for home USB-C Dock PLUS with Power Delivery - Ultra Series (alogic.co)

 

My laptop won't take power delivery from this hub.  I have the hub connected properly (everything else is working) and the only thing I can think of is that my power supply into the hub is inadequate (I'm using a Samsung phone charger that came).  Is that likely to be the issue?




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  #2809918 9-Nov-2021 15:20
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USB-C PD (Power Delivery) negotiates voltage up from the defaut 5V that is common with phone and tablet chargers to up to 20v.  The laptop will likely be expecting a 45w or 65w supply, but may be able to cope with a bit less.  Most phone chargers I've come across top out at 15w, and can only deliver 5v not the 20v the laptop will be expecting.

 

I've learned about this only relatively recently.  https://en.wikipedia.org/wiki/USB_hardware#USB_Power_Delivery 




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