VHK100W-Q48-S48 CUI Inc, VHK100W-Q48-S48 Datasheet

Page 1

... VHK100W-Q24-S15 VHK100W-Q24-S24 VHK100W-Q24-S28 VHK100W-Q24-S48 VHK100W-Q48-S3R3 VHK100W-Q48-S5 VHK100W-Q48-S12 VHK100W-Q48-S15 VHK100W-Q48-S24 VHK100W-Q48-S28 VHK100W-Q48-S48 notes: 1. see output derating curves (page 4) 2. input currents are measured at nominal input voltage 3. efficiency is measured at nominal line, full load INPUT parameter conditions/description input voltage range under voltage lockout 24 Vin power up ...

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... PART NUMBER: VHK100W OUTPUT parameter conditions/description voltage accuracy transient response 25% step load change external trim adj. range ripple & noise (20MHz BW) 3.3V, 5V 12V& 15V 24V 28V 48V temperature coefficient short circuit protection continuous line regulation 5 6 load regulation over voltage protection trip range nom. ...

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... B (TYP) 26.50 1.043 *DIN rail mounting kit available (part# VHK-DIN) PC FILE NAME: VHKXXW Series COPYRIGHT 2008 BY CUI INC. 107.5 4.232 38.0 1.496 18.75 0.738 B (2 PLCS) 70.0 2.756 5 B Terminal # Material Aluminum/Steel REV. DESCRIPTION A NEW DRAWING ...

Page 4

... 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 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 ...

Page 5

... Ipeak = 150%*Pout/(η η *Vmin). In the previous example of VHK100W-Q24-S12, the peak input current at 9V was calculated to be 19.61A. A 20A fuse may be suitable for this application. Make sure the fuse voltage rating is higher than the maximum input voltage. ...

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... R load R trim-up R (KΩ) is the Where: R o,nom , nominal output voltage Table 1. For example, to trim-up the output voltage of 5.0V is calculated module (VHK100W-Q48-S5 4.6V, R trim-up = 11.2 (KΩ) Ω Ω 3.168 7.2 5.8 8.2 19.656 13.304 Table 2 25.474 14.76 42.33 16.67 48.78 5 ...

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... PART NUMBER: VHK100W 10. OUTPUT OCP AND SHORT-CIRCUIT PROTECTION Output overload and short circuit conditional will cause the output voltage to decline or shutdown altogether. is not over 105°C, the output recovers automatically when the short or OCP conditions are removed. In the case of slight overloading, the output voltage may not shut down, but the converter may build up heat over time, causing over-temperature shutdown ...

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... PART NUMBER: VHK100W 14. OUTPUT SERIES CONNECTIONS Two or more converters can be connected in series to obtain a higher output voltage. To prevent output reverse biasing each other in case of a short, add a Schottky diode on each output in reverse polarity, as shown in the diagram. In the event of a short, the converters will forward-bias the diodes and the output reversal will be limited to one diode drop (about 0.5V) only not to damage the converters. The forward current will cause each converter to go into short-circuit protection. make sure that: 1) the diodes voltage rating is higher than each converter output ...

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... EN55022 class B VHK100W-Q24-S48 All other 24 V input models VHK100W-Q48-S48 All other 48 V input models 47 µF/100 V 47 µF/100 V note: The recommended components are a starting point but not guaranteed for meeting these EMI requirements. More or less filtering may be required for a specific application or to meet other EMI standards, e.g.MIL-STD-461 ...

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... For proper output ripple and noise measurement, connect a 10μF tantalum and a 1μF ceramic capacitor across the output. Set the scope bandwidth to 20MHz. Probe directly off of one of the capacitors, using a small ground clip to minimize measurement error. +Vin -Vin th 20050 SW 112 Ave. Tualatin, Oregon 97062 DESCRIPTION: chassis mount dc-dc converter FIGURE 10.3. EMI FILTER FOR VHK100W-XXX-S28 L1 +Vin C2 -Vin C2 47uF/50V KY 47uF/50V KY ...