• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 28 subscribers
  • Views 243 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.

DRV8424: Parallel BDC

May
Genius 9880 points
Part Number: DRV8424
Other Parts Discussed in Thread: DRV8231, DRV8876, DRV8251, DRV8873, DRV8874, DRV8256,

Hi,

In the datasheet it only specifies that it can drive a BDC motor through one channel. Can this chip be used to drive a single BDC via Parallel connection?

Referencing document SLOSE60A Pg 13

Thank you in advance.

Regards,
Maynard

  • 0
    TI__Guru 54725 points

    Maynard,

    We do not recommend paralleling the channels.  If you need more current and a similar device, please consider this option:

    https://www.ti.com/product/DRV8256

    Other single BDC drivers to consider are the DRV8876, DRV8874, DRV8873, DRV8231/31A and DRV8251/51A. 

    If you need even more power, please consider the DRV8243/44/45-Q1.  

    Regards,

    Ryan

  • 0 in reply to Ryan Kehr
    TI__Genius 9880 points

    Hi Ryan,

    Thank you for the suggestion, customer have follow up question, please see details below.

    Another question I had with the both the DRV8256 and DRV8424 is the ability to hot plug motors. Is there internal protection or does there need to be external protection circuitry?

    Regards,
    Maynard

  • 0 in reply to May
    TI__Guru 54725 points

    Maynard,

    The concern would be an over-voltage event if while making the connection current starts to flow and then connection is broken (i.e. intermittent connection while installing wire on screw terminal).  In this case, you could see inductive kickback and damage to motor driver. 

    A voltage clamp would need to be added to supply to protect against this scenario.

    Regards,

    Ryan