SFFSA76 January   2025 DRV81004-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
  7. 5Revision History

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for the DRV81004-Q1 in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity, and from best engineering judgment.

The failure modes listed in this section reflect random failure events and do not include failures resulting from misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure Modes Failure Mode Distribution (%)
OUT is stuck LOW when commanded OFF 10
OUT is stuck OFF when commanded LOW 10
OUT ON resistance too high when commanded LOW 10
OUT slew rate too fast or too slow 10
OUT is stuck HIGH when commanded OFF 10
OUT is stuck OFF when commanded HIGH 10
OUT ON resistance too high when commanded HIGH 9
Incorrect fault indication 25
Incorrect operation of clamp circuit 6