• Locked Locked
  • Replies 4 replies
  • Subscribers 63 subscribers
  • Views 1131 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.

what is full form of OTG in CHARGER IC? Why we need VSYS on Charger IC?

jana
Prodigy 70 points

I am asking to know the reason behind it

  • TI__Guru*** 143970 points
    OTG stands for On the Go. It means the device can provide 5V at its USB connector that is powered from the devices battery. The charger works in reverse as a boost converter instead of a buck converter. The SYS rail allows a portable device to start up immediately when power is applied instead of having to wait for a discharged battery to charge high enough for the electronics to startup.
  • in reply to Jeff F
    Prodigy 70 points

    Tq jeff.

    Another doubt,

    USB connector will source power to downstream device right then why the battery need to power USB 5V.And in which situation buck converter is used.

    P

  • in reply to jana
    TI__Guru*** 143970 points
    If power source is connected to USB adapter then the charger uses buck converter to charge the battery. If a peripheral USB device is connected to USB adapter then the charger is changed into a boost converter, powered from the battery, in order to power the peripheral.
  • in reply to Jeff F
    Prodigy 70 points

    thank you very much for your immediate response Jeff