ZHCSEP5D January 2016 – November 2018 DRV8884
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 is re-enabled after the OCP retry period (tRETRY) has passed. nFAULT becomes high again 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.