BOOSTXL-DRV8305EVM: nfault

Hey Sanjana,

Thank you for posting your question to e2e. We will aim to provide a response by early next week.

Thank you for your patience.

Best Regards,

Akshay

Hey Sanjana,

To provide better feedback, I would like to request some information from the SPI registers to understand why the nfault is being triggered.

Could you please provide the information from the following status registers?

• Warning and Watchdog Reset (Address = 0x1)
• OV/VDS Faults (Address = 0x2)
• IC Faults (Address = 0x3)
• VGS Faults (Address = 0x4)

In the meantime, I would recommend checking out section 7.6.1 of the DRV8305 datasheet which highlights information on the fault detection.

https://www.ti.com/lit/ds/symlink/drv8305.pdf

Best Regards,

Akshay

we are getting PVDD fault when read from SPI registers

Hey Sanjana,

I will consult with the team on potential reasons for the fault and get back to you before the end of the week.

Best Regards,

Akshay

Hey Sanjana,

Thank you for your patience.

If you are getting a PVDD fault from SPI then it means that there is PVDD undervoltage being detected.

It would be helpful if you could provide a waveform of nFAULT and PVDD, where the oscilloscope captures data when nFAULT drops. This would let us figure out the PVDD trend before and after the fault is triggered.

What is the current limit set on the power supply? This is important as too low a current limit would decrease the voltage when the current limit is hit.

I hope this offers some explanation.

Best Regards,

Akshay

when we read data from the ADC we are getting the constant data even in different speeds when we run in open loop . we are expecting that to change we have configured ADC correctly . is something wrong in hardware ?

Hey Sanjana,

I will consult the team and aim to provide feedback by early next week.

Thank you,

Akshay

hello can we get any BOOSTXL- DRV8305 as soon as possible ?