SFFS272 September   2022 TPS7B81-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 HVSSOP Package
    2. 2.2 WSON Package
    3. 2.3 TO-252 Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 HVSSOP Package
    2. 4.2 WSON Package
    3. 4.3 TO-252 Package

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for the TPS7B81-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 (%)
No output 45
Output high (following input) 15
Output not in specification 35
Short circuit on any two pins 5