• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 108 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TUSB1310A: Reset happening from VBUS pin voltage drop

Ryotaro Fukui
Intellectual 2345 points
Part Number: TUSB1310A

Hello team,

I received a inquiry about reset happening on TUSB1310A.

[Question]

What is the threshold for detecting the on/off of the VBUS pins?

[Background]

I heard that VBUS pin is used to determine whether VBUS is connected or not.

The customer circuit seems to be causing reset due to the voltage drop to the VBUS pin.

I want to know how much the VBUS pin should be maintained to prevent it from causing an device stop.

Please contact us if there are other information needed, or if I was misunderstanding about the device.

Best Regards,

Ryotaro Fukui

  • 0
    TI__Guru 60865 points

    Hello,

    VBUS will be sensed high when the voltage at the pin is above 400 mV (Vihmin = 396 mV).  With the noise on VBUS lines and droop / inrush current, it is better to plan for voltage at VBUS to be around 500 mV or higher when VBUS is on.  

    Regards,

    JMMN