DRV8706-Q1: passive freewheeling

Grey Guo

Part Number: DRV8706-Q1
Other Parts Discussed in Thread: DRV8714-Q1

Tool/software:

Hi team,

Does DRV8706-Q1 have the feature of passive freewheeling like DRV8714 and DRV8718? I didn't find such description in the datasheet.

Best Regards

Grey

over 1 year ago

+1 Shinya Morita over 1 year ago

TI__Mastermind 48925 points

Hi Grey,

Thank you for your questions.

Eventually DRV8706-Q1 can do almost same, but different approach.

With DRV8714-Q1, 4 combinations are listed up. Based on logic input(HB_PWMx = H or L), DRV provide 3 combinations (HS and LS OFF, HS ON and LS OFF, HS OFF and LS OFF)

DRV8706-Q1 can support those 3 combinations (HS and LS OFF, HS ON and LS OFF, HS OFF and LS OFF). It comes from different way which is combination of INx and nHIZx.

I want to stop here for this discussion. But strictly speaking, B and D is not same in DRV8706-Q1. INx polarity should be flipped in MCU if want to match to DRV8714-Q1.

regards

Shinya Morita

0 Grey Guo over 1 year ago in reply to Shinya Morita

TI__Intellectual 2740 points

Hi Morita-san,

Thank you for reply. From my understanding, customer can flip nHIZx with PWM if they want to implement passive freewheeling with DRV8706-Q1. Is that right?

Best Regards

Grey

0 Shinya Morita over 1 year ago in reply to Grey Guo

TI__Mastermind 48925 points

Hi Grey,

Yes, customer can use nHIZx for passive freewheeling.

regards

Shinya Morita

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DRV8706-Q1: passive freewheeling