ZHCSJU7 May 2019 DRV8340-Q1
PRODUCTION DATA.
A MOSFET overcurrent event is sensed by monitoring the VDS voltage drop across the external MOSFET RDS(on). If the voltage across an enabled MOSFET exceeds the VVDS_OCP threshold for longer than the tOCP_DEG deglitch time, a VDS_OCP event is recognized and action is done according to the OCP_MODE. On hardware interface devices, the VVDS_OCP threshold is set with the VDS pin, the tOCP_DEG is fixed at 4 μs, and the OCP_MODE is configured for latched shutdown but can be disabled by tying the VDS pin to DVDD. In the SPI device, the VVDS_OCP threshold is set through the VDS_LVL SPI register, the tOCP_DEG is set through the OCP_DEG bits in the SPI register, and the OCP_MODE bit can operate in four different modes: VDS latched shutdown, VDS automatic retry, VDS report only, and VDS disabled.