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DRV8305: Question for DRV8305EVM+F28027

Annie Liu
Genius 10295 points
Part Number: DRV8305

Hi Team,

Customer wanted to confirm does DRV8305EVM need SPI communication to output normally and then set the output mode? If the engate pin is pulled high and then the bridge circuit is directly controlled, can the control be achieved?

is it possible to explain the routine? How to drive 8305 to control brushless DC motor, or how to output PWM wave?

best regards,

Annie

  • 0
    TI__Mastermind 18900 points

    Hello Annie,

    In general, the user only needs to power up the device (PVDD > UVLO thresholds), the EN_GATE pin needs to be asserted, and the internal voltage regulators (e.g. AVDD) needs to settle to final voltages. This puts the device in Operating mode. At this time its best to write the SPI configurations they need to use (e.g. set PWM_MODE) the device as intended (as sleep and power off, but not standby, will lose values in registers). Then, they can toggle INHx and INLx to start driving the motor.

    This is the routine, but theoretically, if they were to configure the SPI registers, go to standby mode (EN_GATE goes low), then they only need to reassert the EN_GATE pin, wait for the regulators, and then they can start driving again.

    Have them look at section 7.4 in the datasheet for more information.

    Best,

    -Cole