• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 64 subscribers
  • Views 645 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS92515-Q1 Phase margin mesurment

Tomohiro Nagasawa
Expert 1710 points
Other Parts Discussed in Thread: TPS92515-Q1

Dear support team

Is it possible to measure phase and gain margin of TPS92515-Q1?

If possible, please teach injection circuit.  

Regards

Tomohiro Nagasawa

  • 0
    TI__Mastermind 27950 points
    We have moved your post to the appropriate forum.
  • 0
    TI__Mastermind 25500 points

    We have not really found an effective way of measuring phase and gain margin for these types of devices. This is partly due to the high side current sense and partly due to the control topology. Fortunately this control topology is inherently high bandwidth and inherently stable. It does not use an error amplifier like current/voltage mode converters, it is hysteretic so it uses a very fast comparator. The switch will simply turn on as long as it needs to until the peak current (set by the VIN/CSN resistor and the IADJ pin voltage) is reached. Then it will turn off for a set off time determined by the output voltage and the COFF pin. So it will really never be unstable, it will do what it is supposed to do. Does that help?

    Thanks and best regards,

    Clint

  • 0 in reply to Clinton Jensen
    Expert 1710 points
    Hello Clint-san

    Thank you for quick response.
    We try to approach another way to confirm stability.

    Thanks
    Best Regards
    Tomohiro Nagasawa