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VHK100W-Q24-S15 Datasheet(PDF) 4 Page - CUI INC

Part # VHK100W-Q24-S15
Description  chassis mount dc-dc converter
Download  10 Pages
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Manufacturer  CUI [CUI INC]
Direct Link  http://www.cui.com
Logo CUI - CUI INC

VHK100W-Q24-S15 Datasheet(HTML) 4 Page - CUI INC

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DESCRIPTION: chassis mount dc-dc converter
4 of 10
08/2009
20050
SW 112th Ave. Tualatin, Oregon 97062
phone
phone 503.612.2300 fax
www.v-infinity.com
fax 503.612.2383
PART NUMBER: VHK100W
APPLICATION NOTES
1. OUTPUT DE-RATING
The operating ambient temperature range for VHK100W is -40 ~ +85°C, with the actual output power subject to the following
de-rating curves at free-air convection and at forced air conditions. To ensure long-term reliability, it is important to ensure proper
cooling at the worst operating conditions. Please note the derating curves may improve if the converter is mounted on a metal
surface to allow heat conduction.
FIGURE 1. OUTPUT DERATING
2. INPUT VOLTAGE RANGE
It is important to ensure the input voltage measured at the converter input pins is within the range for that converter. Make sure wire
losses and voltage ripples are accounted for. One possible problem is driving the converter with a linear unregulated power supply.
For example, if the average voltage measured by a DMM is 9V, with a voltage ripple of 3Vpp, the actual input can swing from 7.5V to
10.5V. This will be outside the specified input range of 10-36V and the converter may not function properly. On the other end, make
sure the actual input voltage does not exceed the highest voltage of 36V or 75V.
3. LEAD WIRES
Make sure the input and output wires are of adequate AWG size to minimize voltage drop, and ensure the voltage across the input
terminals is above the converter's rated minimum voltage at all times. It is recommended to have the wire pairs twisted, respectively
for the input pair and the output pair, so as to minimize noise pickup.
VHK100W Power Derating Curves @ nominal input voltage
0%
20%
40%
60%
80%
100%
120%
-40
45
50
55
60
65
70
75
80
85
Ambient Temperature - degrees C
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)


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