VHK50W-Q48-S12 CUI Inc, VHK50W-Q48-S12 Datasheet
VHK50W-Q48-S12
Specifications of VHK50W-Q48-S12
Related parts for VHK50W-Q48-S12
VHK50W-Q48-S12 Summary of contents
Page 1
... MODEL VHK50W-Q24-S3R3 VHK50W-Q24-S5 VHK50W-Q24-S12 VHK50W-Q24-S15 VHK50W-Q24-S24 VHK50W-Q24-S28 VHK50W-Q24-S48 VHK50W-Q48-S3R3 VHK50W-Q48-S5 VHK50W-Q48-S12 VHK50W-Q48-S15 VHK50W-Q48-S24 VHK50W-Q48-S28 VHK50W-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 ...
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... PART NUMBER: VHK50W 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 5 line regulation 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 ...
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... APPLICATION NOTES 1. OUTPUT DE-RATING The operating ambient temperature range for VHK50W 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 ...
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... Ipeak = 150%*Pout/(η η *Vmin). In the previous example of VHK50W-Q24-S5, the peak input current at 9V was calculated to be 10.29A. A 10A or a 15A 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 trim-down o, nom 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 (VHK50W-Q48-S5 4.6V, R trim-up = 11.2 (KΩ) Ω Ω 7.2 3.3 4.636 7.191 Table 2 6.977 173.7 13.3 phone 503.612.2300 fax phone 10KΩ ...
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... PART NUMBER: VHK50W 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 85°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: VHK50W 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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... PART NUMBER: VHK50W 17. INPUT FILTERING AND EMI INTERFERENCE The VHK50W converters have input capacitors that control input current ripple and the associated EMI interference. However, it has not been tested to a formal standard for conducted emissions. Additional filtering may be needed to ensure compliance to an EMI standard ...
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... PART NUMBER: VHK50W FIGURE 10.2B. EMI FILTER FOR VHK50W (CLASS B) L1 +Vin C1 -Vin Note: Model No. C1 VHK50W-Q24-S28 100uF/50V KY VHK50W-Q48-S28 100uF/100V KY 100uF/100V 1000pF/2KV NC L1 FUSE TVS C1 EMI to meet class A C1 VHK50W-Q24-S48 NC VHK50W-Q48-S48 NC C1 EMI to meet class B 10uF/50V VHK50W-Q24-S48 X7R,2220 Ceramic 47uF/100V VHK50W-Q48-S48 KMF note: The recommended components are a starting point but not guaranteed for meeting these EMI requirements ...
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... PART NUMBER: VHK50W 18. OUTPUT FILTERING The converter has built-in capacitors at the output to control ripple and noise. If desired, additional output capacitance can be introduced at the input to the powered equipment. Recommended starting point: one 10μF tantalum and one 1μF ceramic capacitor in parallel at the output. ...