Can you explain the over-current protection (OCP) of the MP6519 when the current is flowing larger than 200% of the full-scale setting value? How do you calculate this current value? Do they monitor peak or average value?
The 200% latch OCP monitors the current through each MOSFET directly measuring peak value (not average). The full-scale current will depend on the current sense used. Assume default value of 40mohm Rsense. The full scale MOSFET current = Vref_full / 0.04 where Vref_full = 0.240/Riset. You can calculated the latch current = 2 Vref_full / 0.04. If this value is longer for longer than a certain blanking time, then the IC will latch off.
If the high-side MOSFET hits over-current, the high-side MOSFET is turned off immediately and the Fault pin is driven low. At the same time, the two low-side MOSFETs are turned on for several milliseconds and then the two low-side MOSFETs are turned off and IC latches off. The reverse will happen if the low-side MOSFET hits over-current where the low-side MOSFET is turned off immediately and the Fault pin is driven low. And at the same time the high-side MOSFETs are turned on for several milliseconds and then the high-side MOSFETs are turned off and IC latches off.