PDQ2-D5-S3-S Datasheet, PDF (9/10 Pages) CUI INC – DC-DC CONVERTER

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CUI Inc │ SERIES: PDQ2-S │ DESCRIPTION: DC-DC CONVERTER
date 07/26/2016 │ page 9 of 10
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
NC
Cin
33 µF ESR<0.7Ω at 100 kHz
Figure 2 Measuring Output Ripple And Noise
Table 2
C1
NC
C2
NC
EMC RECOMMENDED CIRCUIT
Test Condition
Input Voltage: Nominal
Output Load: Full Load
Figure 3 Conducted Emissions Test Circuit
+Vi
C1 ^L1
-Vi
Table 3
EN55022 Class A
Recommended External Circuit Components
Input
Voltage
C1¹
C2
L1
(Vdc)
5
10 µF / 16 V NC
2.2 µH
12
2.2 µF / 25 V NC
12 µH
24
4.7 µF / 50 V NC
12 µH
48
1 µF / 100 V NC
68 µH
Notes:
1. Ceramic Capacitor
+Vin +Vo
+Vo
C2
-Vin -Vo
-Vo
Table 4
EN55022 Class B
Recommended External Circuit Components
Input
Voltage
C1¹
C2
L1
(Vdc)
5
10 µF / 25 V NC
10 µH
12
2.2 µF / 25 V NC
33 µH
24
6.8 µF / 50 V NC
33 µH
48
2.2 µF / 100 V NC
150 µH
Notes:
1. Ceramic Capacitor
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