• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 3 answers
  • Subscribers 29 subscribers
  • Views 764 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.

Original question:

DRV8305: IC burn when starting to PWM

DRV8305: 48V solution & 1-PWM Mode

Mohammad Atif
Intellectual 270 points
Part Number: DRV8305
Other Parts Discussed in Thread: DRV8313, DRV8320, DRV8353, DRV832X

I understand the DRV8305 has operational voltage ranging from 4V to 45 V. For our application, we need a solution that provides operational voltages up to 48V. Would you recommend the DRV8313 instead of the DRV8305?

2)  the DRV8305 can be run in 6-PWM, 3-PWM and 1-PWM mode. For the 6-PWM and 3 PWM modes use of microcontroller is optional. Correct?

    For 1-PWM mode is an MCU necessary or optional?

  • 0
    TI__Guru 61360 points
    Mohammad,

    Increasing voltage range from the DRV8305, I would recommend the DRV8320 (60V) or the DRV8353 (100V).

    All modes require an MCU, the difference being how many lines you need from the MCU and therefore how complicated the MCU setup is.

    Regards,

    -Adam
  • 0 in reply to Adam Sidelsky
    Intellectual 270 points

    Hi Adam,

    I was under the impression that DRV8305 could be run with external PWM signals without necessarily having an MCU. Is that not the case?

    Are the intended applications for the DRV8320 and 8353 for pumps?

    Would there be a suggested MCU that can be used with DRV83xx series that allows for both communication PWM and Analog input adjustments? Space is a constraint on the PCB. Would need something relatively small.

    Also is it possible to request a DRV8305EVM? Would it be thru Andrew Leverette at TI? Please advise.

    Thank you

    Mohammad

  • 0 in reply to Mohammad Atif
    TI__Guru 61360 points
    Mohammad,

    DRV8305 cannot be run without a MCU since it needs the input signals to align the phases. DRV835x and DRV832x can be run without a MCU since they have hall sensor operation and 1xPWM mode. This allows any PWM signal (even from a 555 timer for example) to control the DRV while the device uses the hall sensor inputs to automatically align the phases.

    I'm sure there's an MCU we could recommend.

    I can't find Andrew in our system, is he a field person you've worked with?

    Regards,

    -Adam
  • 0 in reply to Adam Sidelsky
    Intellectual 270 points

    Hi Adam,

    Thanks for your insight.

    Yes, I believe he is a Product Marketing Engineer for the DRV83xx series. The web video introducing the DRV8305 or DRV83xx series gives his full name and his colleague. His last name is : Leverette. I may have mis-spelled it.

    Hope this helps.

    Thank you

    Mohammad

  • 0 in reply to Mohammad Atif
    TI__Guru 61360 points
    Mohammad,

    Please send me an email at adam(dot)Sidelsky(at)ti(dot)com and we can discuss the EVM.

    Regards,

    -Adam