Texas Instruments UCC29950EVM-631, User Manual, Page: 19 / 38

Load Current (A)
Ef
ficie
nc
y
(%)
0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5
80
81
82
83
84
85
86
87
88
89
90
91
D001
115 V
90 V
230 V
Load Current (A)
Ef
ficie
nc
y
(%)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
D001
90 V
115 V
230 V
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Performance Data and Typical Characteristic Curves
7.3 Efficiency
Figure 12. UCC29950EVM-631 Typical Efficiency Figure 13. UCC29950EVM-631 Typical Light-Load
(as a function of line voltage and current) Efficiency
(as a function of line voltage and current)
The UCC29950EVM-631 also meets the requirements of 80PLUS Silver with good margin and is close to
meeting the requirements of 80PLUS Gold.
Table 3. UCC29950EVM-631, Typical Average Efficiency
V
IN
(V) F (Hz) % LOAD P
IN
(W) P
OUT
(W) EFFICIENCY PF AVG EFF (%)
(%)
115 60 100 345.3 300.0 86.9 0.999 88.0
75 256.7 225.0 87.6 0.999
50 168.0 150.0 89.2 0.997
25 84.95 75.0 88.3 0.990
230 50 100 337.0 300.0 89.0 0.995 90.1
75 250.7 225.0 89.7 0.990
50 164.4 150.0 91.3 0.982
25 83.02 75.0 90.3 0.958
19 SLUUB69A – March 2015 – Revised March 2015 Using the UCC29950EVM-631 300-W PFC/LLC Off-Line PSU Module
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