DRV8714H-Q1EVM: 8714

Hi,

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 "loop error" is gap/error amount from target. PDR_ERR = 1 bit means to limit this gap/error feedback as 1 bit amount only even if gap/error is more than 1 bit. Eventually makes system loop gain lower.  

regards

Shinya Morita

Hi Katherine,

Actual error means the actual amount of error between target and tDON.  KP_PDR and PDR_ERR are independent factor however eventually both of two increase/decrease of gain of PDR loop. 

Lowest KP_PDR and PDR_ERR=1bit error is the combination for lowest gain setting for PDR loop.

regards

Shinya Morita

Hi Katherine,

Thank you for your question.

I meant same in Gap and error. It means gap from target.

regards

Shinya Morita