Datasheet

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CUI Inc │ SERIES: VHK100W │ DESCRIPTION: DC-DC CONVERTER date 12/16/2013 │ page 4 of 8
DERATING CURVES
0%
20%
40%
60%
80%
100%
120%
-40 45 50 55 60 65 70 75 80 85
Ambient Temperature - degrees C
Relative Output Power - % of nominal output
Natural
Convection
0.5 m/S
(100LFM)
1.0 m/S
(200LFM)
1.5 m/S
(300LFM)
2.0 m/S
(400LFM)
2.5 m/S
(500LFM)
3.0 m/S
(600LFM)
3.5 m/S
(700LFM)
EMC RECOMMENDED CIRCUITS
Figure 1
Figure 2
Recommended Circuit for EN55022 Class A
(for all models)
EN55022 CLASS A
Table 1
TEST CONFIGURATION
C1 Cin
L1
To Oscilloscope
+Vin
-Vin
+Vo
-Vo
R-Load
Vi
n
+
-
Note: Input reected-ripple current is measured with an inductor L1 and Capacitor C1 to simulate source impedance.
External components
L1 12μH
C1 220μF, ESR < 0.1Ω at 100 KHz
Cin 33μF, ESR < 0.7Ω at 100 KHz
DC/DC Converter
+Vo
-Vo
+Vin
C1
-Vin
C2
+Vo
-Vo
+Vin
-Vin
-S
+S
L1
VHK100W Power Derating Curves At Nominal Input
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