SFFSA77 January   2025 DRV81008-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

Failure Mode Distribution (FMD)

The failure mode distribution estimation for the DRV81008-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 ModesFailure Mode Distribution (%)
OUT is stuck LOW when commanded OFF10
OUT is stuck OFF when commanded LOW10
OUT ON resistance too high when commanded LOW10
OUT slew rate too fast or too slow10
OUT is stuck HIGH when commanded OFF10
OUT is stuck OFF when commanded HIGH10
OUT ON resistance too high when commanded HIGH9
Incorrect fault indication25
Incorrect operation of clamp circuit6