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NDXS4815EC Datasheet(PDF) 5 Page - Murata Manufacturing Co., Ltd. |
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NDXS4815EC Datasheet(HTML) 5 Page - Murata Manufacturing Co., Ltd. |
5 / 6 page NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters KDC_NDXC.G01 Page 5 of 6 All enquiries: www.murata-ps.com/support www.murata-ps.com OSCILLOSCOPE Y INPUT SUPPLY C1 C2 C3 R1 T1 R2 Input Output DC/DC Converter R LOAD + + - - CHARACTERISATION TEST METHODS Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors. C1 1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter C2 10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less than 100mΩ at 100 kHz C3 100nF multilayer ceramic capacitor, general purpose R1 450Ω resistor, carbon film, +/-1% tolerance R2 50Ω BNC termination T1 3T of the coax cable through a ferrite toroid RLOAD Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires Measured values are multiplied by 10 to obtain the specified values. Differential Mode Noise Test Schematic Input Reflected Ripple Current Test Method Input reflected ripple current measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors. C1 220uF with ESR of <0.1Ω at 100kHz, rated at supply voltage L1 12uH rated at 150% minimum of the DC current taken by the converter. C2 The recommended input capacitor for the DC/DC converter. L Load DC/DC Converter + Input - Input C1 C2 Supply +v Supply -v Current Probe |
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