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DRV8303: High Side or Low Side PWM & using the 3-PWM mode

Grady
Prodigy 180 points
Other Parts Discussed in Thread: DRV8301, DRV8303

Hello

What are the Pro's and Con's to both high side or Low side PWM switching when using the DCR8303? (high side N-channels)

I was looking to use the 6-PWM modem PWM the high side and just use standard IO for the low side for the 6-step commutation. The 3-PWM mode looks interesting however I was hoping someone could highlight the issues created and how they are resolved... Ie, with 6 step you may need GH_A & GL_B high and all switches on LEG C off, as far as I can tell in 3-PWM mode you can not switch Leg C off completely (perhaps 3-PWM mode is more suited to sinusoidal or FOC control?). If I could disable leg C completely (on this step)  it is also apparent that the motor will be driven in bipolar four quadrant configuration which may be useful as future proof.

If possible, please can someone show me where I can find some scope traces of the motor phases when the 3-PWM mode is used?

Thanks