SFFS886 September   2024 TPS1214-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)

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for TPS1214-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 Modes Failure Mode Distribution (%)

Gate output stuck high

19%

Gate output stuck low

34%

Gate output functional, not in specification voltage or timing

27%

Short circuit protection fails to trip or false trip

2%
i2t protection fails to trip or false trip

6%
IMON not in specification

3%

ITMPO not in specification

4%
Pin to Pin short any two pins

5%