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DCMJU24S51-10 Datasheet(PDF) 5 Page - Wall Industries,Inc. |
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DCMJU24S51-10 Datasheet(HTML) 5 Page - Wall Industries,Inc. |
5 / 6 page Wall Industries, Inc. Rev A DCMJU10 SERIES 10 Watt DC/DC Power Converters 11/27/2013 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 5 of 6 DESIGN & FEATURE CONSIDERATIONS Output Ripple Reduction A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 4.7µF capacitors at the output. +Out -Out +Vin -Vin Load DC Power Source + - Cout Single Output DC/DC Converter +Out -Out +Vin -Vin Load DC Power Source + - Cout Com. Load Cout Dual Output DC/DC Converter Thermal Considerations Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module, and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 100°C. The derating curves are determined from measurements obtained in a test setup. DUT Position of air velocity probe and thermocouple 50mm / 2in Air Flow 15mm / 0.6in TEST CONFIGURATIONS Input Reflected-Ripple Current Test Setup Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100 KHz) to simulate source impedance. Capacitor Cin offsets possible battery impedance. Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0-500 KHz. +Out -Out +Vin -Vin DC/DC Converter Load Battery + Lin + Cin To Oscilloscope Current Probe Peak-to-Peak Output Noise Measurement Test Use a 0.47µF ceramic capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20MHz. Position the load between 50mm and 75mm from the DC/DC converter. +Out -Out +Vin -Vin Resistive Load Scope Copper Strip Cout Copper Strip Single Output DC/DC Converter +Out -Out +Vin -Vin Resistive Load Scope Copper Strip Cout Com. Scope Cout Copper Strip Copper Strip Dual Output DC/DC Converter |
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