DRV8860: The DRV8860 issue for the Fault Register

Hi Zhang, 

Thank you for reaching out to us. 

Zhang Liang said:

We use the DRV8860 for the low side IO module control, and now, After reading and clearing the fault, there will be two open leakage faults that do not output and sometimes have data errors.

To be confirmed, you mean the fault register report presence of open load fault on two channels? if yes, can you mentioned which channels are reported as Open load fault. 

When any output is in off status (the corresponding Data Register bit is set to ‘0’), a current sink pulls the node down with approximately 30 µA. If the voltage on the pin is sensed to be less than 1.2 V, then an open load condition is reported. nFAULT is driven low and the OL bit of the fault register (F8:F1) corresponding to the specific channel is set.

Open load faults are automatically cleared whenever the corresponding output is turned on by setting the Data register bit to ‘1’. Alternatively, a Fault Reset special command will also clear this value. In either case, once all bits in the Fault register are clear, nFAULT is released.

Zhang Liang said:

The attachment is a screenshot of the erroneous data exported by the customer, please advise how to solve this issue

The screen shots are not clear to me, Would you please explain the screenshots and let me know which register they are showing? 

Best regards, 

Mojtaba