PDQ30-Q24-S3-D Datasheet, PDF (7/9 Pages) CUI INC – DC-DC CONVERTER

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CUI Inc │ SERIES: PDQ30-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
12 µH
C1 220 µF ESR < 0.1 Ω at 100 kHz
Cin
33 µF ESR < 0.7 Ω at 100 kHz
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
L1
(Vdc)
24
100 µF / 50 V 0.47 µH
48
4.7 µF / 100 V 2.2 µH
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