• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 1066 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.

TPS386000 / bottom sense Resister value

Ryuji
Guru 20090 points
Other Parts Discussed in Thread: TPS386000-Q1

Hello,

In the datasheet P.23 of TPS386000-Q1, there is the following description.

"Select RSnL = 10 kΩ for all channels to ensure DC accuracy."

However, the TPS386000EVM is not use 10kohm for RSnL. and use 100kohm for RSnH.
Could you please let me know this reason?
Should we use same resistors for RSnL or RSnH for DC accuracy?

Best Regards,
Ryuji Asaka


  • 0
    TI__Guru 55940 points
    Hi Ryuji,

    This phrase was written a bit more strongly than intended. This is meant to be a design example rather than a requirement for all applications.

    In general for SVS devices, you want the divider current to be 100x the sense pin current for best DC accuracy. For TPS386000-Q1, Isense is a maximum of 25nA. As a result, the bottom resistor should be no larger than 160k. Please note that while a smaller resistor will allow for more current to flow through the resistor divider.

    Very Respectfully,
    Ryan