Do you know what it takes to start monitoring the communication between USB Type-C devices, as well as the VBUS and VCONN voltage? With the Total Phase USB Power Delivery Analyzer - download the software, connect the USB Power Delivery to your devices and take measurements. There are five easy steps shown in the video below:
As you also saw in the video, you can view the data as well as graphs for the voltage and current measurements in the Data Center software.
 |
 |
|
|
Figure 1: USB Type-C Data |
Figure 2: USB Type-C Voltage and Current |
Here’s a summary about the voltage and current measurements:
Vbus Voltage. Measured via an INA231 ADC on the Vbus lines of the USB Type C receptacle connector pins A4, A9, B4, and B9 Vbus Current. Measured via an INA231 ADC across a 0.015 Ohm shunt resistor between the Vbus input Type C receptacle and the Vbus Type C plug Vconn Voltage. Measured via INA231 ADC on CC2 signal (pin B5) of the USB Type C receptacle. Vconn Current. Measured via an INA231 ADC across a 0.015 Ohm shunt resistor between the CC2 (pin B5) Type C receptacle and the CC2 (pin B5) Type C plug CC1 Voltage. Measured via STM32's internal ADC - this clips at 3.3V and is useful for "traffic indication". CC2 Voltage. Measured via STM32's internal ADC - this clips at 3.3V and is useful for "traffic indication"Additional resources that you may find helpful include the following:
- USB Power Delivery Analyzer Quick Start Guide
- USB Power Delivery Analyzer User Manual
- Voltage and Current Measurements with the USB PD Analyzer
- Total Phase USB Power Delivery Analyzer - Easy Set Up
- www.chromium.org
If you have any questions about our USB Delivery Device or other Total Phase products, feel free to email us at sales@totalphase.com, or if you already own one of our devices and have a technical question, please submit a request for technical support.