This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS2546: TPS2546 Wake on USB feature

Part Number: TPS2546

Hi, 

Customer raised the question for why TPS2546 designed only these 2 scenarios support Wake on USB, why not all the mode change support the Wake on USB feature. What is the design concept? 

Best regards,

Randy Chen

  • Hi Randy,

    Wake on USB is supported from these two cases because the transition between these states only involves the change in one CTL pins. This is done for design considerations. If two pins are changed, there is a chance they are not changed simultaneously, which can cause the device to see a state that could cause an out discharge. Thus the device does not support wake on USB for scenarios where two pins have to be changed, and only supports the ones listed above. This is explained in another way in the note section you pasted, shown below:

    Thanks,

    Emma