PDQ10-Q24-S3-D Datasheet, PDF (7/9 Pages) CUI INC – DC-DC CONVERTER

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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
To Oscilloscope
L1
+
Vin
-
C1
Cin
+Vin
+Vo
R-Load
-Vin
-Vo
Table 1
L1
1 µH
C1
6.8 µF ceramic capacitor
Cin
none
Figure 2 Measuring Output Ripple And Noise
Table 2
C1
10 µF tantalum capacitor
C2
1 µF ceramic capacitor
EMC RECOMMENDED CIRCUIT
Test Condition
Input Voltage: Nominal
Output Load: Full Load
Figure 3 Conducted Emissions Test Circuit
Table 3
EN55022 Class A
Recommended External Circuit Components
Input
Voltage C1
C2
(Vdc)
C3
L1
24
NC 10 µF / 50 V 10 µF / 50 V short
48
NC 4.7 µF / 100 V 4.7 µF / 100 V short
Table 4
EN55022 Class B
Recommended External Circuit Components
Input
Voltage
C1
C2
C3
L1
(Vdc)
24
10 µF / 50 V NC 10 µF / 50 V 3.3 µH
48
4.7 µF / 100 V NC 4.7 µF / 100 V 3.3 µH
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