Tool/software:
Hello,
I am hoping that you will be able to help me with an issue that we have on the VBUS.
We have a device that uses the USB as a dual role and can use up to 15W of power.
The requirement is also that we support a host mode of operation when an USB flash drive is inserted into the device to transfer the files. In this case the device is powered through two different methods (both capable of at least 25W).
There are no issues when powering the device through USB but when we insert the USB flash drive some, by the looks of it, random spikes happen on the VBUS (picture attached below).
We also looked at the input PP5V line and it looks good. There are some ripples on it but not something I say that would trigger these spikes.
