1 Reply Latest reply on Mar 19, 2018 8:51 PM by lisz

    CCG3PA PD Negotiation issue

    jake.tesler_3187181

      Hello,
      I'm having an issue using the CCG3PA Eval kit (CY4532) to charge certain devices. Under normal operating conditions, and using the latest stock Power Adapter firmware, I am unable to charge Apple Mac laptops. The issue appears to stem from a USB-C negotiation error, although I can't be certain.

       

      I am monitoring the voltage of the Type-C VBUS line, and (when the USB Type-C connector is plugged in) the voltage seems to endlessly cycle between 0V and 5V. While the Apple computer recognizes there IS a charger plugged in, it will not draw any power from the device (0 watts). However, if I use a USB-A to USB-C adapter connected to the USB-A port, I can charge the laptop with about 5W. It's only when using the Type-C port on the CCG3PA EVK Main Board that I cannot charge the computer.

       

      The CCG3PA will charge a Google Pixel 2 XL phone with no issue; monitoring the same Voltage test point, it cycles between 0V and 5V once, and then remains at a steady-state voltage of 9V.

       

      I am running the latest firmware (3.1.2), with the CYPD3171-24LQXQ_cla_3_1_2_1511_0_0_0_pa.cyacd firmware file.

      Does anyone have any suggestions or have seen this issue before?

      -Jake