Texas Instruments UCC2977EVM - Manual (Page 23)

Test Results
3-5 Test Results
3.2 Test Results
The test results for the SLUP178 are shown in this section.
Figure 3–4. Efficiency With a Low Profile Sumida Inductor (CDRH6D28; 22
µ
H, 128 m
Ω
,
6.7
Ч
6.7
Ч
3 mm)
50
55
60
65
70
75
80
85
90
3 4 5 6
VI – Input Voltage – V
Efficiency
–
%
EFFICIENCY
vs
INPUT VOLTAGE
4.7 mA
4 mA
3 mA
2 mA
Figure 3–5. Efficiency With a High Profile Toko Inductor (646CY–220M; 22
µ
H,
115 m
Ω
, 7.6
Ч
7.6
Ч
5.1 mm)
50
55
60
65
70
75
80
85
90
3 4 5 6
VI – Input Voltage – V
Efficiency
–
%
EFFICIENCY
vs
INPUT VOLTAGE
4.8 mA
4 mA
3 mA
2 mA