Texas Instruments UCC25640EVM-020, User Manual, Page: 16 / 40

Performance Data and Typical Characteristic Curves
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16 SLUUBX3B – June 2019 – Revised November 2019
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UCC25640EVM-020 Evaluation Module
9.2.2 PFC LLC Standby Power and Light Load Efficiency
PFC LLC system standby power for UCC25640EVM-020 is measured with both UCC28056EVM-296 and
UCC28064EVM-004. Refer to
Section 5.3 for test setup and procedure. The WT310 power analyzer is
used for PFC LLC standby and light load measurements.
Table 5. Total Standby Power with UCC28056EVM-296 (PFC) and UCC25640EVM-020 (LLC)
V
IN
(V) P
IN
(W) V
OUT
(V) I
OUT
(A) P
OUT
(W) Efficiency (%)
90 0.218 9.697 0.0124 0.120 54.94
115 0.216 9.697 0.0124 0.120 55.44
230 0.223 9.697 0.0124 0.120 53.70
265 0.227 9.697 0.0124 0.120 52.76
90 0.361 9.697 0.0248 0.240 66.56
115 0.360 9.696 0.0248 0.240 66.74
230 0.364 9.697 0.0248 0.240 66.01
265 0.365 9.697 0.0248 0.240 65.83
Table 6. Total Standby Power with UCC28064EVM-004 (PFC) and UCC25640EVM-020 (LLC)
V
IN
(V) P
IN
(W) V
OUT
(V) I
OUT
(A) P
OUT
(W) Efficiency (%)
90 0.229 9.697 0.0124 0.120 52.29
115 0.228 9.696 0.0124 0.120 52.52
230 0.250 9.697 0.0124 0.120 47.90
265 0.260 9.697 0.0124 0.120 46.06
90 0.374 9.696 0.0248 0.240 64.24
115 0.370 9.696 0.0248 0.240 64.94
230 0.391 9.696 0.0248 0.240 61.45
265 0.400 9.696 0.0248 0.240 60.07
9.3 Efficiency
Figure 8 illustrates the standalone EVM efficiency graph.
Figure 8. Efficiency vs Output Current