SLVK099B March   2022  – September 2023 TPS7H5001-SP , TPS7H5002-SP , TPS7H5003-SP , TPS7H5004-SP

PRODUCTION DATA  

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Single-Event Effects (SEE)
  6. 3 Device and Test Board Information
  7. 4 Irradiation Facility and Setup
  8. 5 Depth, Range, and LETEFF Calculation
  9. 6 Test Setup and Procedures
  10. 7 Destructive Single-Event Effects (DSEE)
    1. 7.1 Single-Event Latch-Up (SEL) Results
    2. 7.2 Single-Event Burnout (SEB) and Single-Event Gate Rupture (SEGR) Results
  11. 8 Single-Event Transients (SET)
    1. 8.1 System Level Implications
  12. 9 Event Rate Calculations
  13. 10Summary
  14.   A Total Ionizing Dose from SEE Experiments
  15.   B References
  16.   C Revision History

9 Event Rate Calculations

Event rates were calculated for LEO (ISS) and GEO environments by combining CREME96 orbital integral flux estimations and simplified SEE cross-sections according to methods described in Heavy Ion Orbital Environment Single-Event Effects Estimations application report. We assume a minimum shielding configuration of 100 mils (2.54 mm) of aluminum, and “worst-week” solar activity (this is similar to a 99% upper bound for the environment). Using the 95% upper-bounds for the SEL and the SEB/SEGR, the event rate calculation for the SEL and the SEB/SEGR is shown on Table 9-1 and Table 9-2, respectively. It is important to note that this number is for reference since no SEL or SEB/SEGR events were observed. SET orbit rate for OUTA at VIN=12-V and FSW = 500 kHz is presented on SEB/SEGR Event Rate Calculations for Worst-Week LEO and GEO Orbits. The SET orbit rate calculations are based on the TPS7H5001-SP device as this is the device with the most data and as mentioned earlier in the report there is high confidence that the TPS7H5002/3/4-SP devices correlate with the TPS7H5001-SP.

Table 9-1 SEL Event Rate Calculations for Worst-Week LEO and GEO Orbits
Orbit TypeOnset LETEFF (MeV-cm2/mg)CREME96 Integral FLUX (/day/cm2)σSAT (cm2)Event Rate (/day)Event Rate (FIT)MTBE (Years)
LEO (ISS)756.26 × 10–51.23 × 10–77.69 × 10–123.20 × 10–43.55 × 108
GEO1.77 × 10–42.17 × 10–119.06 × 10–41.25 × 108
Table 9-2 SEB/SEGR Event Rate Calculations for Worst-Week LEO and GEO Orbits
Orbit TypeOnset LETEFF (MeV-cm2/mg)CREME96 Integral FLUX (/day/cm2)σSAT (cm2)Event Rate (/day)Event Rate (FIT)MTBE (Years)
LEO (ISS)

75

6.26 × 10–55.27 × 10–83.29 × 10–121.37 × 10–48.30 × 108
GEO1.77 × 10–49.31 × 10–123.88 × 10–42.94 × 108
Table 9-3 SET (OUTA @ VIN=12-V , FSW=500 KHz at Upsets ≥ 30 %) Event Rate Calculations for Worst-Week LEO and GEO Orbits

The cross section of 1.06 x 10-5 is based on the Onset LETEFF of 37.3 MeV-cm2/mg found in table 8-3.

Orbit TypeOnset LETEFF (MeV-cm2/mg)CREME96 Integral FLUX (/day/cm2)σSAT (cm2)Event Rate (/day)Event Rate (FIT)MTBE (Years)
LEO (ISS)

37.3

1.15 x 10-3

1.06 × 10–51.22 × 10–8

5.11 × 10–1

2.23 × 105
GEO4.43 x 10-34.70 × 10–8

1.95 × 100

5.82 × 104