SFFS549 April   2024 LM7481-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)

Failure Mode Distribution (FMD)

The failure mode distribution estimation for LM7481-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 due to misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure ModesFailure Mode Distribution (%)
DGATE output stuck at Low30%
HGATE output stuck at Low25%
DGATE output not in specification – voltage or timing15%
HGATE output not in specification – voltage or timing15%
DGATE output stuck at High5%
HGATE output stuck at High5%

Short circuit any two pins

5%