Скачать или смотреть Powering 3.3V/3A via a USB-C PD source

Without needing to use a USB-C PD controller chip, handling communication over the USB cable, USB-C standard allows to get 5V up to 3A through a hardware availability detection.
Here I show a design developed on KiCad and assembled through JLCPCB.
It is sinking power from a USB-PD connector and provides 5V and 3.3V up to 3A through a step-down converter.

00:00 intro: topics covered
02:20 the USB-C PD standard
05:08 main architecture of the USB-PD powered step-down converter
05:46 KiCad schematics
12:23 using Ti Webench to setup the step-down converter
13:45 selecting components on JLCPCB
18:10 PCB layout
20:05 create the JLCPCB order
28:55 fixing a component footprint
32:39 testing the boards received: USB-C PD charger test
36:25 testing the boards received: laptop USB-C DisplayPort test
37:19 testing the boards received: Surface PRO9 USB-C test
38:34 unexpected results: the blinking red led
41:45 filtering communication over CC1/CC2
44:17 conclusions



Documentation:
the KiCad project files: https://github.com/maudeve-it/3.3V-3A...
the TI Power Designer webpage: https://www.ti.com/webench
KiCad and JLCPCB: let me to not add here their website address