DRV8714-Q1: 8714

Katherine Wang

Part Number: DRV8714-Q1

Hi Team,

What does this gain factor mean? Is it better to choose a larger one or a smaller one?

For my second question, is the step current value of each bit the same when I adjust the PDR? Is it related to the gain factor above?

Kind regards,

Katherine

over 2 years ago

0 Shinya Morita over 2 years ago

TI__Mastermind 38005 points

Hi,

Thank you for your question. I will review it and feedback to you within 24hours.

regards

Shinya Morita

0 Shinya Morita over 2 years ago in reply to Shinya Morita

TI__Mastermind 38005 points

Hi,

Thank you for your question. PDR is trying to find best IPRE_CHR current level to meet target tDON. This is feedback loop system to find best IPRE_CHG current. Then this gain factor is decide how much increase IPRE_CHR in one cycle. Normally lower gain is better to set. Lower gain could makes system loop stable.

regards

Shinya Morita

0 Katherine Wang over 2 years ago in reply to Shinya Morita

TI__Intellectual 2210 points

Hi Shinya,

Does the current change according to the changes of the gear of Idrvn when IPRE_CHR is adjusted?

Regards,

Katherine

+1 Shinya Morita over 2 years ago in reply to Katherine Wang

TI__Mastermind 38005 points

Hi Katherine,

Thank you for your question.

IRE_CHR and IDRVx are independent settings. Please refer datasheet 8.3.4.4

regards

Shinya Morita

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DRV8714-Q1: 8714