SFFS832 September   2024 UCC27301A-Q1 , UCC27311A-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 SOIC Package
    2. 2.2 VSON Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SOIC Package
    2. 4.2 VSON Package

VSON Package

This section provides functional safety failure in time (FIT) rates for the VSON package of the UCC273x1A-Q1 based on two different industry-wide used reliability standards:

Table 2-3 UCC27301A-Q1 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11
FIT IEC TR 62380 / ISO 26262 FIT (Failures Per 109 Hours)
Total component FIT rate 7
9
Die FIT rate 3
5
Package FIT rate 4
4

The failure rate and mission profile information in Table 2-3 comes from the reliability data handbook IEC TR 62380 / ISO 26262 part 11:

  • Mission profile: Motor control from table 11
  • Power dissipation: 10mW, 400mW
  • Climate type: World-wide table 8
  • Package factor (lambda 3): Table 17b
  • Substrate material: FR4
  • EOS FIT rate assumed: 0 FIT
Table 2-4 UCC27311A-Q1 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11
FIT IEC TR 62380 / ISO 26262 Power Dissipation (mW) FIT (Failures Per 109 Hours)
Total component FIT rate 10 7
400 9
Die FIT rate 10 3
400 5
Package FIT rate 10 4
400 4

The failure rate and mission profile information in Table 2-4 comes from the reliability data handbook IEC TR 62380 / ISO 26262 part 11:

  • Mission profile: Motor control from table 11
  • Power dissipation: 10mW, 400mW
  • Climate type: World-wide table 8
  • Package factor (lambda 3): Table 17b
  • Substrate material: FR4
  • EOS FIT rate assumed: 0 FIT
Table 2-5 UCC27301A-Q1 Component Failure Rates per Siemens Norm SN 29500-2
Table Category Reference FIT Rate Reference Virtual TJ
5 CMOS, BICMOS
Digital, analog, or mixed
20 FIT 55°C
Table 2-6 UCC27311A-Q1 Component Failure Rates per Siemens Norm SN 29500-2
Table Category Reference FIT Rate Reference Virtual TJ
5 CMOS, BICMOS
Digital, analog, or mixed
20 FIT 55°C

The reference FIT rate and reference virtual TJ (junction temperature) in Table 2-5 and Table 2-6 come from the Siemens Norm SN 29500-2 tables 1 through 5. Failure rates under operating conditions are calculated from the reference failure rate and virtual junction temperature using conversion information in SN 29500-2 section 4.