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CUI Inc │SERIES: PDQ10-D │ DESCRIPTION: DC-DC CONVERTER
date 07/12/2016 │ page 7 of 9
TEST CONFIGURATIONS
Input Ripple Current & Output Noise
Figure 1 Measuring Input Ripple Current
Figure 2 Measuring Output Ripple And Noise
To Oscilloscope
L1
+Vin
-Vin
+Vo
-Vo
+
-
Vin
C1
Cin
R-Load
Table 1
1 µH
Table 2
L1
C1
Cin
C1
C2
10 µF tantalum capacitor
1 µF ceramic capacitor
6.8 µF ceramic capacitor
none
EMC RECOMMENDED CIRCUIT
Test Condition
Input Voltage: Nominal
Output Load: Full Load
Figure 3 Conducted Emissions Test Circuit
Table 3
Table 4
EN55022 Class A
Recommended External Circuit Components
EN55022 Class B
Recommended External Circuit Components
Input
Voltage
(Vdc)
Input
Voltage
(Vdc)
C1
C2
C3
L1
C1
C2
NC
C3
L1
24
48
NC
NC
10 µF / 50 V
10 µF / 50 V
short
24
48
10 µF / 50 V
10 µF / 50 V
3.3 µH
4.7 µF / 100 V 4.7 µF / 100 V short
4.7 µF / 100 V NC
4.7 µF / 100 V 3.3 µH
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