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MCF8315A: BLDC motor drive scheme

Anna
Intellectual 995 points
Part Number: MCF8315A
Other Parts Discussed in Thread: MCF8316A, , MCT8315A, MCT8316A, MCT8316Z, DRV5055

Hi Dears,

1. The customer wants to choose the BLDC motor drive scheme, which is internally integrated with MOS. The motor specification is 12V and the maximum current is 2A.

2. Looking at MCT8316A/MCF8316A/MCT8315A/MCF8315A, whether these four models are internally integrated with meta-sensors, and do not need external Hall sensors to determine the rotor position

3. Is there a difference between MCT8316A and MCT8315A only in peak current? Are there any differences elsewhere?

4. From the data of MCT8315A and MCF8315A, we can see that the control mode is different. Which one is easier to develop in terms of software and hardware

  • 0
    TI__Expert 5578 points

    Hi Anna,

    Thanks for your question on the Motor Drives E2E Forum. 

    MCx8316A and MCx8315A are motor drivers with commutation algorithms for sensorless trap and FOC control. We do have a MCT8316Z device that is built for sensored trapezoidal commutation. If you are ever curious about our offerings please check out our BLDC Integrated Control portfolio page (https://www.ti.com/motor-drivers/brushless-dc-bldc-drivers/integrated-control-bldc-drivers/overview.html) and specifically our portfolio visualization which does a good job highlighting the differences of each device based on voltage and power capabilities, commutation method, and driver architecture:

    3. The biggest difference between MCx8316A and MCx8315A is the peak current and the RDSon, yes.

    4. MCT8315A (T for Trapezoidal commutation) is typically seen as easier for development but our MCx device portfolio makes both of these options accessible for the customer. Based on the winding of their motor and their specific application, they may prefer a specific commutation method over another. 

    Let me know if you have any additional questions.

    Best,

    Robert

  • 0 in reply to Robert Wedan
    Intellectual 995 points

    Hi Dear,

    1. MCT8316Z is externally connected with Hall sensor to determine the orientation. From the chapters 8.3.2.1 and 8.3.2.2 of the datasheet, analog or digital Hall sensor can be selected, as shown in the figure below.

    2.The customer learned that DRV5055 can detect the position more accurately. Could you tell me whether the linear Hall effect sensor can be connected to MCT8316Z and how to design the circuit？

    3.The customer's application scenario is UAV PTZ control，Which Hall sensor is more suitable for this application？

  • 0 in reply to Anna
    TI__Expert 5578 points

    Hi Anna,

    2. Yes this linear hall sensor will work with the MCT8316Z in the analog hall input mode. Please see section 9.2 Hall Sensor Configuration and Connection for more application details on how to connect the sensors to the MCT8316Z. 

    3. In terms of which hall sensor to use, please direct that question to our hall effect sensor team as they will be the experts to help you pick the right one for your application. 

    Hopefully this helps answer your question. Let me know if you have any additional questions!

    Best,

    Robert

  • 0 in reply to Robert Wedan
    TI__Expert 5578 points

    Hi Anna,

    If there are no more questions, could you please help mark this thread as resolved?

    I will close the thread for now, but feel free to open it again if you have an additional question around this topic.

     

    Best,

    Robert