AN966 Datasheet, PDF (18/21 Pages) STMicroelectronics – The front-end stage of conventional off-line converters

AN966 APPLICATION NOTE
DEMO BOARD EVALUATION RESULTS
To evaluate the performance of the PFC demonstration board, the following parameters have been
measured: PF(Power Factor), THD%(Current Total Harmonic Distortion), ∆Vo (Peak-to-Peak Output
Voltage Ripple), Vo (Output Voltage), η (Efficiency).
The test equipment set-up is shown in fig. 15 and the results are shown in table 2.
The harmonic content measurement has been done with an EMI/RFI filter interposed between the AC
source and the demo board under test, while the efficiency has been calculated without the filter contri-
bution. The filter is configured as shown in fig. 16, where:
T1 = 2 x 15mH, T2 = 2 x 47mH, Cx1 = 0.47µF / 630V, Cx2 = 0.68µF/630V
Figure 15. Test Equipment Set-up
AC POWER
SOURCE/ANALYZER
HP6813A
EMI FILTER
L6561
PFC DEMO
RESISTIVE
LOAD
D97IN679
Figure 16. EMI Filter Configuration
LINE
T1
T2
C_x1
C_x2
PFC
D97IN680
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