USB Charge Ports: Difference between revisions

USB Charge Ports (view source)

1,090 bytes removed , 29 November 2023

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Replaced content with "=== Vendors Providing USB Charge Ports === * USB Charge Ports Part 2 Category:Optional"

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-Supported Charging Protocols
-* The standards are evolving all the time as devices need more power. When USB started, only 100 mA were provided, then 250, 500, etc and now up to 3A. All this at 5V. At some point, higher voltages were introduced to transfer more power as cables really only care about current, not the voltage. Negotiating higher voltages started as proprietary solutions on USB-A ("Quick Charge" etc), but USB-PD on USB-C ports is now a widely adopted standard to do the same [[wikipedia:USB_PD|(more here)]]. For example 2 A at 5V gives you 10 Watts but at 9V 18 Watts. Not all USB-C ports support the USB-PD higher voltage modes, rather just 5V.
-* It pays off to buy a USB in-line measurement dongle. With those, you can see the negotiated voltage, the drawn current and therefore the power transferred. There are quite some surprises with the various chargers. Some quick chargers might not be so quick with your actual device.
-Temperature Range
-* It can get hot under the panel or in arm-rests. Worth checking the supported operating range and venting requirements.
 === Vendors Providing USB Charge Ports ===
 * [[USB_Charge_Ports2|USB Charge Ports Part 2]]
 [[Category:Optional]]