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UEE-3.3-15-D48 Datasheet(PDF) 7 Page - Murata Manufacturing Co., Ltd. |
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UEE-3.3-15-D48 Datasheet(HTML) 7 Page - Murata Manufacturing Co., Ltd. |
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7 / 29 page  www.murata-ps.com/support UEE Series Isolated, High-Density, Eighth-Brick DOSA Low Profile DC/DC Converters MDC_UEE_Series.A04 Page 7 of 29 Emissions Performance, Model UEE-3.3/15-D48 Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power while doing the tests. The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information is listed in the Product Specifications. An external discrete filter is installed and the circuit diagram is shown below. [1] Conducted Emissions Parts List [2] Conducted Emissions Test Equipment Used Spectrum Analyzer – Hewlett Packard HP8594L Line Impedance Stabilization Network (LISN) – 2 Line V-Networks LS1-15V, 50 Ω, 50 μH [3] Conducted Emissions Test Results [4] Layout Recommendations Most applications can use the filtering which is already installed inside the converter or with the addition of the recommended external capacitors. For greater emissions suppression, consider additional filter components and/or shielding. Emissions performance will depend on the user’s PC board layout, the chassis shielding environment and choice of external components. Please refer to Application Note GEAN02 for further discussion. Since many factors affect both the amplitude and spectra of emissions, we recommend using an engineer who is experienced at emissions suppression. Designation Value Part Number Description Vendor C1 1 μF GRM32ER72A105KA01L SMD Ceramic, 100V, 1000nF, X7R-1210 Murata C2 100 nF GRM319R72A104KA01D SMD Ceramic, 100V, 100nF ±10%, X7R-1206 Murata L1 1320 μH LB16H1324 Common Mode choke, 1320 μH, ±25%, 4A, R5K, *21*21*12.5mm High Light C4, C5 0.022 μF GRM32DR73A223KW01L SMD Ceramic, 1000V, 0.022 μF, ±10%, X7R-1210 Murata C3 220 μF UHE2A221MHD Alum. electrolytic, 100V, 220 μF, ±10%, long lead Nichicon C6 Not used Not used for this model L1 LOAD C1 C2 C3 C6 C4 C5 External DC Power Source DC/DC Converter Ground -Vsource NEG. LINE POS. LINE Spectrum Analyzer Return + + Figure 2. Conducted Emissions Test Circuit Graph 1. Conducted emissions performance, Positive Line, CISPR 22, Class A, full load Graph 2. Conducted emissions performance, Negative Line, CISPR 22, Class A, full load |
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