ZHCSER7C October 2015 – November 2018 DRV8885
PRODUCTION DATA.
An analog current limit circuit on each FET limits the current through the FET by removing the gate drive. If this analog current limit persists for longer than tOCP, all FETs in the H-bridge will be disabled and nFAULT will be driven low.
The driver will be re-enabled after the OCP retry period (tRETRY) has passed. nFAULT becomes high again at after the retry time. If the fault condition is still present, the cycle repeats. If the fault is no longer present, normal operation resumes and nFAULT remains deasserted.