Mini PD Sink
A board to negotiate USB Power Delivery contracts and output them on solder points. Small enough to hide in a cable (11x13mm).
This is designed to allow simple projects to be powered from USB PD bricks and batteries at up to 100W (20V@5A) while being discretely placed in a cable.
USB C all the things! Am I the only one that has a box of cables that I find myself digging through almost daily? Well, no more. With this little gadget you can use a single USB C PD supply to power all your projects!
USB PD can negotiate 5-20V at up to a current of 5A. This means a max power of 100w! By connecting to the solder pads, I only need to keep one cable on my desk. This is a smaller version of the USB PD Sink that outputs to a screw terminal.
By default the device is configured to negotiate 3 preconfigured PDOs: - PDO1: 5V @ 1.5A - PDO2: 15V @ 1.5A - PDO3: 20V @ 1A
However, these can easily be adjusted using an I2C programming interface to set the Non-Volatile Memory (NVM) registers. The device could also be connected to a microcontroller, to allow on the fly negotiation of the PD contract. Libraries for Arduino exist and are quick and easy to use.
This board features: - Controller: STUSB4500 - Output Voltage: 5-20V - Output Current: 0-5A - LED: Built in RGB LED to display which PDO is negotiated - Protection: ESD and Transient Protection on both power and USB-C Pins. Disharge on VBUS path on voltage change or cable detach.
Got my boards in from @oshpark and surprised at how little these Mini_PD boards are. (Canadian Dime for scale) pic.twitter.com/NaMzJOwcMd
— Ketan Desai (@ketszim) November 25, 2020