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S36SE05003EKFB Datasheet(PDF) 6 Page - Delta Electronics, Inc. |
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S36SE05003EKFB Datasheet(HTML) 6 Page - Delta Electronics, Inc. |
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6 / 14 page  DS_S36SE05003_10252013 6 DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few μH, we advise adding a 10 to 100 μF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability. Layout and EMC Considerations Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Below is the example of using Delta latest FL75L07 A input filter tested with S36SE series to meet class B in CISSPR 22. Schematic and Components List C3 S36SE Series C1 C2 FL75L07 A Vin C1 is 22uF/100V, low ESR Aluminum cap; C2 is 2.2uF ceramic cap; C3 is 22nF ceramic capacitor; FL75L07 A is Delta input EMI filter module. Test Result Test result is in compliance with CISPR 22 class B, which is shown as below: Vin=48V, Po=15W, average mode Safety Considerations The power module must be installed in compliance with the spacing and separation requirements of the end- user’s safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements. Basic insulation based on 75 Vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this DC-to-DC converter is identified as TNV-2 or SELV. An additional evaluation is needed if the source is other than TNV-2 or SELV. When the input source is SELV circuit, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met: |
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