SLVSD29 October 2015 DRV8704
PRODUCTION DATA.
Overcurrent is sensed by monitoring the voltage drop across the external FETs. If the voltage across a driven FET exceeds the value programmed by the OCPTH bits in the DRIVE register for more than the time period specified by the OCPDEG bits in the DRIVE register, an OCP event is recognized. During an OCP event, the H-bridge experiencing the OCP event is disabled. In addition, the corresponding xOCP bit in the STATUS register is set, and the FAULTn pin is driven low. The H-bridge (or H-bridges) will remain off, and the xOCP bit will remain set, until it is written to 0, or the device is reset.