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VHK100W-Q24-S15 Datasheet(PDF) 4 Page - CUI INC |
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VHK100W-Q24-S15 Datasheet(HTML) 4 Page - CUI INC |
4 / 10 page page date 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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