Hi,
Thanks for the information. The oscilloscope plot shows FAULT going low for 5 ms, which is the fixed delay for an OCP event.
An OCP event can be triggered either by the voltage being above the VSENSEOCP threshold on the ISEN pin, or the drain to source voltage on the external MOSFETs is greater than the VFETOCP threshold for longer than the tFETOCP interval.
Based on your description above it sounds like the motor is trying to pull to much current during startup.
Can you measure the Drain to source voltage across each of the MOSFET's in your circuit during startup?
Can you measure the voltage across ISEN during startup?
Thanks for the information. The oscilloscope plot shows FAULT going low for 5 ms, which is the fixed delay for an OCP event.
An OCP event can be triggered either by the voltage being above the VSENSEOCP threshold on the ISEN pin, or the drain to source voltage on the external MOSFETs is greater than the VFETOCP threshold for longer than the tFETOCP interval.
Based on your description above it sounds like the motor is trying to pull to much current during startup.
Can you measure the Drain to source voltage across each of the MOSFET's in your circuit during startup?
Can you measure the voltage across ISEN during startup?