USB-C Power Delivery
By Parker Bondi
August 23, 2025
In this article I highlight just how easy it is to use the USB-C 3.0 Power Delivery Specification.
The Specification
The USBC3.0 power delivery specification continues to expand the possibilities of USB powered devices with the ability for peripheral devices to negotiate the voltage and current supplied by the host. The USB Power Delivery specification can be found here:
https://usb.org/document-library/usb-power-delivery
The USB-C Interface for Power Delivery
Any Downward Facing USB interface will initially provide up to 5V and 1.5A (7.5W) of power. But both of these values can now be negotiated across the USB-C interface using the CC1 and CC2 pins.
No Firmware and A Robust Hardware Setup
The TPS25730D from Texas Instruments (https://www.ti.com/product/TPS25730?utm_source=google&utm_medium=cpc&utm_campaign=asc-int-null-44700045336317239_prodfolderdynamic-cpc-pf-google-ww_en_int&utm_content=prodfolddynamic&ds_k=DYNAMIC+SEARCH+ADS&DCM=yes&gclsrc=aw.ds&gad_source=1&gad_campaignid=6467517989&gbraid=0AAAAAC068F3Y6jN2sj1LF7LDzDqfAadCf&gclid=Cj0KCQjwzaXFBhDlARIsAFPv-u_osfIKGSq0h-BGMODWqzyLyP-ceUE6LymPwqSR9njQ-932Mvk8qfUaAkjYEALw_wcB) takes care of this interface and negotiations on your behalf on startup based on the strapping values you provide it.
If you’re looking for more information on how to properly interface with the USB-C Power Delivery Ecosystem I would recommend reading:
https://www.ti.com/document-viewer/lit/html/SSZTB41
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