BOOSTXL-DRV8323RS: Logic High on ENABLE pin sets GHA, GHB, and GHC High

Brian Havens

Part Number: BOOSTXL-DRV8323RS
Other Parts Discussed in Thread: DRV8323, TMS320F28069M

I am doing some testing with the BOOSTXL-DRV8323RS and TMS320F28069M launchpad. When I set the ENABLE pin high, the high side gates all go high even when I am commanding them low. The low side gates are commanded low and stay low. This happens before even setting the DRV8323 up over SPI. So, it is in the default 6x PWM mode. Is this the expected behavior?

over 7 years ago

0 Hector Hernandez Luque over 7 years ago

TI__Expert 8985 points

Hi Brian,

Can you please verify if the mode is 6x PWM mode on your board? You can do so on the GUI by reading or writing the register 0x02 bits [6,5] as [0,0]. Thank you.

0 Brian Havens over 7 years ago in reply to Hector Hernandez Luque

Prodigy 30 points

Hector,

Thanks for responding. I confirmed that the gate driver is in 6x PWM by querying it via SPI and checking the contents of the gate driver control message. I confirmed SPI is working using a scope and by checking the contents of the OCP and CSA control registers and verifying that they match the defaults listed in the DRV8323 reference.

Thanks

0 Hector Hernandez Luque over 7 years ago in reply to Brian Havens

TI__Expert 8985 points

Hi Brian,

What code are you using with the TMS320F28069M?

0 Brian Havens over 7 years ago in reply to Hector Hernandez Luque

Prodigy 30 points

Hector,

I swapped the BOOSTXL-DRV8323 board with a replacement and the new one is working properly. Thanks

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BOOSTXL-DRV8323RS: Logic High on ENABLE pin sets GHA, GHB, and GHC High