Appendix A- Evaluation Board Schematic - Delta Electronics Delphi S48SS Series Evaluation Manual

7) Use the following formulas to calculate the efficiency:
Efficiency= (Pout/Pin) × 100(%)
Pin = Iin × Vin
Pout = Iout × Vout
The following graph shows the efficiency results of the S48SS/S48SR
converters measured at different operating points.

Appendix A- Evaluation Board Schematic

COPPER
L1
VIN+
NC
C2
NC
VIN-
R1
NC
SW1
Hi
1
NC
NC ZD1
Low 3
90
85
80
75
70
65
60
55
50
0.5 1
SVin+
VIN+
BNC1
C3
68u/100V
VIN-
SVin-
J2
NC
J3
0
R3
VR1
NC
100K
ON/OFF
Floating DOWN
3
2 OFF
2
SW2
NC C1 1
UP
J1
R2 VR2
NC
NC 100K
J4
0
1.5 2 2.5 3 3.5
OUTPUT CURRENT (A)
VOUT+
TRIM
C101 C102 C103 C104 C107 C108 C109 C110
NC NC NC NC NC NC NC
VOUT-
36Vin
48Vin
75Vin
4 4.5
VOUT+
BNC2
C105 C106
NC 1u/25V 10u/25V
VOUT-
10