Delta Electronics IPM- C Series - Manual (Page 13)

7) Use the following formulas to calculate the efficiency:
Efficiency= (Pout/Pin) × 100(%)
Pin = Iin × Vin
Pout = Iout × Vout
For IPM12C series
The following graph shows the efficiency results of the IPM12C0A0R04A converter measured at
different operating points, the output voltage was set at 5V.
70
80
90
100
1 2 3
LOAD (A)
EF
FI
C
IE
N
C
Y
(%
)
4
Vi=14V
Vi=12V
Vi=10V
Vi=8V
For IPM04C series
The following graph shows the efficiency results of the IPM04C0A0R06A converter measured at
different operating points, the output voltage was set at 3.3V.
75
85
95
1 2 3 4 5 6
LOAD (A)
EF
FI
C
IE
N
C
Y
(%
)
Vin=5.5V
Vin=5.0V
Vin=4.0V
13