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DRV8306: DRV8306 active braking in 4-quadrants control

Lorenzo Ventura24
Prodigy 20 points
Part Number: DRV8306
Other Parts Discussed in Thread: DRV8320

Greetings,

I am developing a device that requires a sensored BLDC motor to perform sinusoidal speed profiles in the 1Hz - 20Hz range. To meet this requirement and generate accurate sine wave profiles, I will need to perform fast and  "active" speed braking (sometimes known as "4-quadrants" BLDC control).

The DRV8306 driver has only one PWM input to control motor speed. When the speed setpoint is reduced, will this driver autonomously invert currents to actively brake the motor, or will it just passively brake ("2-quadrants" control)?

Is the DRV8306 a suitable solution for my application, or should I move to a less-integrated solution that will allow me to manually control each of the 6 PWM lines of the H bridge?

Thank you for your attention.

With kind regards,
Lorenzo Ventura

  • 0
    TI__Guru 65390 points

    Lorenzo,

    The DRV8306 does not actively brake when the speed command is reduced, You can use the brake mode or pin to do this though.

    I would advise using a device such as the DRV8320 which would allow full control of all 6 PWM inputs so you can do the algorithm yourself.

    Regards,

    -Adam