MCT8317A datasheet(59/161 Pages) TI1

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IOCP

tOCP

nFAULT

Time

IOUTx

nFAULT Pulled High

Fault Condition

nFAULT Released

Peak Current due

to deglitch time

Clear Fault

Figure 8-44. Overcurrent Protection - Latched Shutdown Mode

8.3.19.6.2 OCP Automatic Retry (OCP_MODE = 000b)

When an OCP event happens in this mode, all the FETs are disabled and the nFAULT pin is driven low. The

DRIVER_FAULT and OCP bits are set to 1b in the GATE_DRIVER_FAULT_STATUS register. Normal operation

resumes automatically (gate driver operation and the nFAULT pin is released) after the TRETRY time lapses.The

DRIVER_FAULT, OCP and corresponding FET's OCP bits are set to 1b until cleared through the CLR_FLT bit.

IOCP

tOCP

nFAULT

Time

IOUTx

nFAULT Pulled High

Fault Condition

nFAULT Released

Peak Current due

to deglitch time

tRETRY

Figure 8-45. Overcurrent Protection - Automatic Retry Mode

8.3.19.6.3 OCP Report Only (OCP_MODE = 011b)

No protective action is taken when an OCP event happens in this mode. The overcurrent event is reported by

setting the DRIVER_FAULT and OCP bits to 1b in the GATE_DRIVER_FAULT_STATUS register. The device

continues to operate as usual. The external controller manages the overcurrent condition by acting appropriately.

The reporting clears when the OCP condition clears and a clear fault command is issued by writing 1b to the

CLR_FLT bit.

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MCT8317A

SLLSFQ2 – JANUARY 2023

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MCT8317A Datasheet(PDF) 59 Page - Texas Instruments