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About VREFIN and VSNS relation of TPS51367

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: TPS51367

Please let me know about relation of VREFIN and VSNS.

Is TPS51367 necessary to make "VREFIN=VSNS"?

If necessary, how is a permission offset?

(VREFIN=VSNS+7mV, Is it no ploblem?)

 

Best regards,

Satoshi

  • 0
    Guru 19645 points
    Sorry, customer have no time.
    Please give me the update.
  • 0 in reply to Satoshi
    TI__Guru**** 191445 points

    I'm not sure I understand your question.  VREFIN sets the target output voltage.  You can derive it from a resistor divider from the internal 2V reference or use a internal fixed option using Table 1.  VSNS should be tied directly to the output voltage.  In a well regulated system with external resistor divider, VSNS should be forced equal to VREFIN by the closed loop control circuit.  The may be some offset, but it is not specified.  7mV seems like a lot to me.