The description of nFault in the manual is not intuitive enough. Please help confirm the nFault status as follows

Meng jeffrey

Part Number: DRV8873-Q1

No over-temperature, over-current, under-voltage, short-circuit and other faults (After power-on stabilization)
SLEEP	L	L	H	H
EN	L	H	L	H
nFault

No over-temperature, over-current, under-voltage, short-circuit and other faults (instantaneous power on)
SLEEP	L	L	H	H
EN	L	H	L	H
nFault

over 6 years ago

0 Hector Hernandez Luque over 6 years ago

TI__Expert 8985 points

Hi,

Would you kindly indicate what device you gather this information from? Thank you.

0 LeonardEllis over 6 years ago

TI__Guru 71526 points

Hi Meng,

What "manual" are you referring to? Is there a specific part number for which this applies to?

Thanks for clarifying,

~Leonard

0 Hector Hernandez Luque over 6 years ago in reply to LeonardEllis

TI__Expert 8985 points

Hi Meng,

Does this e2e tie to this e2e posted by Sherry Liang? If so, let us know and we will close this e2e.

e2e.ti.com/.../793537

0 Sherry Liang over 6 years ago

TI__Genius 10255 points

Part Number: DRV8873-Q1

Dear team,

The nFault description in the datasheet is not very clear, could you please help confirm the nFault status of the following conditions?

No over-temperature, over-current, under-voltage short-circuit and other fault conditions The IC is in a stable state after power-on
SLEEP	L	L	H	H
EN	L	H	L	H
nFault	L or H?	L or H?	L or H?	L or H?

No over-temperature, over-current, under-voltage short-circuit and other fault conditions the moment when the IC is powered on
SLEEP	L	L	H	H
EN	L	H	L	H
nFault	L or H?	L or H?	L or H?	L or H?

Thanks & Best Regards,

Sherry

0 Hector Hernandez Luque over 6 years ago

TI__Expert 8985 points

Hi Sherry,

nFAULT is dependent on the fault conditions indicated in Table 13. Fault Response, column REPORT.

0 Hector Hernandez Luque over 6 years ago in reply to Hector Hernandez Luque

TI__Expert 8985 points

Hi Sherry,

Expanding further:

Please, take a look at section 7.4 Device Functional Modes to understand DRV8873-Q1 Functional Modes

0 Sherry Liang over 6 years ago in reply to Hector Hernandez Luque

TI__Genius 10255 points

Dear Hector,

So at above condition, the nFault pin is low?

0 Hector Hernandez Luque over 6 years ago in reply to Sherry Liang

TI__Expert 8985 points

If the condition you speak of "During the device power-up sequence, or when exiting sleep mode..." then that is correct, nFault pin is low and it does not represent a fault condition.

0 Sherry Liang over 6 years ago in reply to Hector Hernandez Luque

TI__Genius 10255 points

At the below condition, the nFault pin is high?

No over-temperature, over-current, under-voltage short-circuit and other fault conditions The IC is in a stable state after power-on
SLEEP	L	L	H	H
EN	L	H	L	H
nFault	L or H?	L or H?	L or H?	L or H?

No over-temperature, over-current, under-voltage short-circuit and other fault conditions the moment when the IC is powered on
SLEEP	L	L	H	H
EN	L	H	L	H
nFault	L or H?	L or H?	L or H?	L or H?

0 Meng jeffrey over 6 years ago in reply to Hector Hernandez Luque

Expert 2760 points

DRV8873HPWPRQ1

0 Meng jeffrey over 6 years ago in reply to LeonardEllis

Expert 2760 points

DRV8873HPWPRQ1...

0 Hector Hernandez Luque over 6 years ago in reply to Sherry Liang

TI__Expert 8985 points

Hi Sherley,

See table and legend below:

1 - nFault not driven low and depends on external pull-up voltage

2 - nFault driven low

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The description of nFault in the manual is not intuitive enough. Please help confirm the nFault status as follows