SFFS192 March 2022 UCC5350-Q1 , UCC5390-Q1

2 Functional Safety Failure In Time (FIT) Rates

This section provides Functional Safety Failure In Time (FIT) rates for UCC5350-Q1 and UCC5390-Q1 based on two different industry-wide used reliability standards:

Table 2-1 provides FIT rates based on IEC TR 62380 / ISO 26262 part 11. Power dissipation: 100 mW
Table 2-2 provides FIT rates based on IEC TR 62380 / ISO 26262 part 11. Power dissipation: 300 mW
Table 2-3 provides FIT rates based on the Siemens Norm SN 29500-2

Table 2-1 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11 Power dissipation: 100 mW

FIT IEC TR 62380 / ISO 26262 Power	FIT (Failures Per 10⁹ Hours)
Total Component FIT Rate (UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8.UCC5390-Q1 - DWV SOIC-8 )	12,19,19
Die FIT Rate ( UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8.UCC5390-Q1 - DWV SOIC-8 )	5,4,4
Package FIT Rate ( UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8.UCC5390-Q1 - DWV SOIC-8 )	7,15,15

Table 2-2 Component Failure Rates per IEC TR 62380 / ISO 26262 Part 11 Power dissipation: 300 mW

FIT IEC TR 62380 / ISO 26262	FIT (Failures Per 10⁹ Hours)
Total Component FIT Rate (UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8,UCC5390-Q1 - DWV SOIC-8 )	15,24,24
Die FIT Rate ( UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8,UCC5390-Q1 - DWV SOIC-8 )	7,8,8
Package FIT Rate ( UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8,UCC5390-Q1 - DWV SOIC-8 )	8,16,16

The failure rate and mission profile information in Table 2-1 and Table 2-2 come from the Reliability data handbook IEC TR 62380 / ISO 26262 part 11:

Mission Profile: Motor Control from Table 11
Power dissipation: 100 mW, 300 mW
Climate type: World-wide Table 8
Package factor (lambda 3): Table 17b
Substrate Material: FR4
EOS FIT rate assumed: 0 FIT

Table 2-3 Component Failure Rates per Siemens Norm SN 29500-2 of UCC5350-Q1 - D SOIC-8, UCC5350-Q1 - DWV SOIC-8,UCC5390-Q1 - DWV SOIC-8

Table	Category	Reference FIT Rate	Reference Virtual T_J
5	CMOS, BICMOS Digital, analog / mixed	22 FIT	55°C

The Reference FIT Rate and Reference Virtual T_J (junction temperature) in Table 2-3 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.