The species used for the SEL testing was a silver (¹⁰⁹Ag) ion with an angle-of-incidence of 0° for an LET_EFF = 48 MeV × cm² / mg. For more details, see Section 5). The kinetic energy in the vacuum for this ion is 1.634 GeV (15-MeV / amu line). Flux of approximately 10⁵ ions / cm² × s and a fluence of approximately 10⁷ ions / cm² were used for the twelve runs. Run duration to achieve this fluence was approximately two minutes. The six devices were powered up using the recommended maximum voltage of 32 V and the maximum load of 5.4 A (1.35 A per channel). The device was set up with OUT₁ operating in a single configuration. OUT₂, OUT₃, OUT₄ were operated in a parallel configuration. See Figure 6-1 for more details. OUT₁ was loaded to 1.35-A, while OUT₂, OUT₃, and OUT₄ were in parallel loaded to 4.05 A(1.35 A per channel). The TPS7H2140-SEP was tested under enabled and disabled modes. The device was disabled by using an external power supply on the EN_X test points. During SEB/SEGR testing with the device disabled, no OUT_X transient or input current events were observed. No SEB/SEGR events were observed during all twelve runs, which indicates that the TPS7H2140-SEP is SEB/SEGR-free up to LET_EFF = 48 MeV × cm² / mg and across the full electrical specifications. Table 8-3 lists the SEB test conditions and results. Figure 7-2 and Figure 7-3 show a plot of the current versus time for run 7 (enabled) and run 8 (disabled).

Using the MFTF method shown in Single-Event Effects (SEE) Confidence Interval Calculations and combining (or summing) the fluences of the twelve runs at 25°C (11.93 × 10⁷), the upper-bound cross-section (using a 95% confidence level) is calculated as:

${\mathrm{\sigma }}_{\mathrm{S}\mathrm{E}\mathrm{B}}\mathrm{ }\le \mathrm{ }3.09\mathrm{ }\times \mathrm{ }{10}^{-8}\mathrm{ }{\mathrm{c}\mathrm{m}}^2\mathrm{ }/\mathrm{ }\mathrm{d}\mathrm{e}\mathrm{v}\mathrm{i}\mathrm{c}\mathrm{e}\mathrm{ }\mathrm{f}\mathrm{o}\mathrm{r}\mathrm{ }{\mathrm{L}\mathrm{E}\mathrm{T}}_{\mathrm{E}\mathrm{F}\mathrm{F}}\mathrm{ }=\mathrm{ }48\mathrm{ }\mathrm{M}\mathrm{e}\mathrm{V}\mathrm{ }\times \mathrm{ }{\mathrm{c}\mathrm{m}}^2/\mathrm{m}\mathrm{g}\mathrm{ }\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{ }{\mathrm{T}}_{\mathrm{J}}\mathrm{ }=\mathrm{ }25°\mathrm{C}$

Figure 7-2 I_IN versus Time for Run 7 (Enabled) for the TPS7H2140-SEP

Figure 7-3 I_IN versus Time for Run 8 (Disabled) for the TPS7H2140-SEP