BOOSTXL-DRV8320H: DRV8320

nimesh shewale

Prodigy 120 points

Part Number: BOOSTXL-DRV8320H

I'm applying PWM to on high side gate speed is not getting controlled, is there any way to control speed?

over 2 years ago

0 Aaron Barrera over 2 years ago

TI__Mastermind 26046 points

Hi Nimesh,

Speed can be controlled through the PWM duty cycle.

Make sure VM is powered on and ENABLE is high before applying PWMs or else you will not see a PWM output occur.

Thanks,
Aaron

0 nimesh shewale over 2 years ago in reply to Aaron Barrera

Prodigy 120 points

I've done all required coonection motor is running but speed isn't getting control precisely base on duty cycle , during 50-100 duty cycle hall frequency is almost constant

I'm using driver in 6x mode(sensored) , mode pin is to GND, & 3 PWM i've given to high side gate INHx , do i have to introduce dead time in between pwm?

& if i'm giving 3 pwm to high side only , which mode do i have to select 3x or 6x?

0 Aaron Barrera over 2 years ago in reply to nimesh shewale

TI__Mastermind 26046 points

You should use 3x PWM mode if you're using 3 high side PWMs. Set the MODE pin to GND using a 47kohm resistor. This produces synchronous PWM gate drive outputs on GHx/GLx. You cannot insert dead time from the MCU in this mode, the dead time will be fixed to 100ns.

0 Aaron Barrera over 2 years ago in reply to Aaron Barrera

TI__Mastermind 26046 points

Also ensure INLx = high while INHx receives PWMs in 3x mode.

Thanks,
Aaron

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BOOSTXL-DRV8320H: DRV8320