• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 931 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.

DRV2700 output Triangle wave question.

Chen Bogey8
Mastermind 9990 points
Other Parts Discussed in Thread: DRV2700

Hi Sir 

we input 5V Square wave 23KHz in input side. but we got 25V Triangle wave in output side.

when we reduce frequency to 15KHz, the output wave form is normal.

 May we check the condition is normal?

                                                             Bogey

  • 0
    TI__Guru** 114905 points
    Hi Bogey,

    Your post is being moved to the Haptics forum for better support.
  • 0
    TI__Genius 10512 points
    Hi Bogey,

    Refer to section 9.2.1.2.10 of the datasheet, particularly figure 26. Depending on your capacitance, there is a limit on how high the frequency can be increased before the DRV2700 is not able to supply enough current to charge the load. Once this slew rate limit is hit, the device will change a sine or square wave into a triangle wave because the DRV2700 is charging and discharging the load slower than the switching frequency. So this waveform is normal.
    Let me know if you need more assistance.