SFFS312 March   2022 LM5152-Q1 , LM51521-Q1

ADVANCE INFORMATION  

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)

Failure Mode Distribution (FMD)

The failure mode distribution estimation for the LM5152-Q1 and LM51521-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 (%)
HO or LO gate driver stuck on 10
HO or LO gate driver stuck off 20
HO or LO gate driver open (high-Z) 5
VOUT voltage not in specification 30
STATUS false trip or fails to trip 35