• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 153 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.

LM5143-Q1: Rise time/ Fall time of SW pins

Cedrick
Expert 8270 points
Part Number: LM5143-Q1

Hi,

Good day. I hope you are well.

Our customer want to know what is the acceptance criteria for the rise time and fall time for SW pins of LM5143QRWGRQ1. I'll copy below their exact inquiry so no words would be lost. I would appreciate your help on this matter.

"we need the Acceptance criteria for Rise time and Fall time at SW1 and SW2 pin for Testing purpose

I am doing functionality testing at SW pin , we will measure Rise,Fall, Switching frequency , Duty cycle amplitude
for Switching frequency  data is found in datasheet , for Duty cycle and amplitude we can calculate
but rise time, fall time i don't know how to list the acceptance criteria."

I hope you could help us on providing this information. Thank you.


Regards,

Cedrick



  • 0
    TI__Mastermind 49597 points

    Hi Cedrick,

    Rise and fall time are generally 5-10ns. However, when the regulator is unloaded, the fall time is slower as the inductor current that discharges the SW node capacitance is quite low.

    My recommendation is to use efficiency as a benchmark to verify correct power supply operation.

    Regards,

    Tim