SFFS815 February   2024 DRV8262-Q1

PRODUCTION DATA  

  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)

Failure Mode Distribution (FMD)

The failure mode distribution estimation for the DRV8262-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
xOUTx is stuck LOW when commanded OFF9 %
xOUTx is stuck OFF when commanded LOW12 %
xOUTx ON resistance too high when commanded LOW9 %
Low side slew rate too fast or too slow3 %
xOUTx is stuck HIGH when commanded OFF9 %
xOUTx is stuck OFF when commanded HIGH12 %
xOUTx ON resistance too high when commanded HIGH9 %
High side slew rate too fast or too slow3 %
Dead time is too short3 %
Incorrect communication or fault indication12 %
Current regulation incorrect19 %