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STUSB4500 - Autonomous USB-C PD controller for Power Sinks / UFP

The STUSB4500 is an autonomous USB-C PD controller for Power Sinks which enables you to configure the required/available power for your device from a USB-C PD Power Source. The STUSB4500 is configurable via I2C interface.

Documentation

Usage

I2cConnectionSettings settings = new I2cConnectionSettings(1, StUsb4500.DefaultI2cAddress);
I2cDevice device = I2cDevice.Create(settings);

using(StUsb4500 stUsb = new StUsb4500(device))
{
    CableConnection connection = stUsb.CableConnection;
    
    if (connection != CableConnection.Disconnected)
    {
        double voltage = stUsb.RequestedVoltage;
        RequestDataObject rdo = stUsb.RequestDataObject;
        double availablePower = voltage * rdo.MaximalCurrent;
    }
}

Short introduction to the STUSB4500

By default a USB Type-C port on your hardware can get only 5V from a USB-PD Power Source (Host / DFP) This product enables to automatically negociate with the Source a higher Voltage (>5V) up to 100W (20V@5A). For instance, if the Power brick can provide 4 power profiles (5V, 9V, 15V and 20V), then the STUSB4500 will request the highest voltage available (20V). Another example, if the Power brick can provide 4 power profiles (5V, 9V, 15V and 20V) but the Application needs 9V to boot, then the STUSB4500 can be programmed to always request 9V. This part can be easily implemented in a battery charger with USB-C input in the application.

The device doesn't need any software to run (it is automous). But it is possible to connect to this device by I2C to take control over the default device behavior, or to get the power information (Voltage/Current) of the attached power source at the other side of the cable.