This board has the goal to replace random power adapters with a standardized way to use a USB-C power delivery (USB PD) adapter instead. For regular operation, no programming or software configuration is involved with this design. All options are set through resistor values.
If needed an I2C interface to a microcontroller is available, to access status and control registers. This part of the board is separated through a break-off tab (mouse bits) and can be snapped off.
I made the conscious design decision to not add a USB-A connector option at the output end. I did not want to build a device, that is capable of putting more than 5V on the VBUS pin of a regular USB cable and potentially destroy the device that is plugged in.
- USB-C PD Power Delivery Sink
- Selector switch for 5V, 9V, 12V, 15V or 20V
- Max current 5A, settable in 250mA steps through resistor options
- Red LED to indicate failed power request
- I2C telemetry interface to controller chip
- Snap off option for telemetry interface
- For fixed voltage, the switch can be replace by wire jumper
- small form factor to be heat shrinked as part of the power cable
- Size 48mm x 15mm (without telemetry interface)
- Height 12mm with screw terminal and switch, 6mm without.
- 2oz copper to safely handle 5A
- Lead free RoHS compliant