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NXA025A0X-SP Datasheet(PDF) 9 Page - Lineage Power Corporation |
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NXA025A0X-SP Datasheet(HTML) 9 Page - Lineage Power Corporation |
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9 / 21 page  Data Sheet May 19, 2009 NaosTM NXA025 SMT Non-isolated Power Modules: 10 – 14Vdc Input; 0.8Vdc to 5.5Vdc Output; 25A output current LINEAGE POWER 9 Test Configurations TO OSCILLOSCOPE CURRENT PROBE LTEST 1μH CS 220μF E.S.R.<0.1 Ω @ 20°C 100kHz Min 150μF VIN(+) COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. CIN Figure 21. Input Reflected Ripple Current Test Setup. NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. VO(+) COM 1uF . RESISTIVE LOAD SCOPE COPPER STRIP GROUND PLANE 10uF Figure 22. Output Ripple and Noise Test Setup. VO COM VIN(+) COM RLOAD Rcontact Rdistribution Rcontact Rdistribution Rcontact Rcontact Rdistribution Rdistribution VIN VO NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Figure 23. Output Voltage and Efficiency Test Setup. η = VO. IO VIN. IIN x 100 % Efficiency Typical Application Circuit Vout Qx Rx 4.99k Dx Share SEN+ SEQ/ENA SEN- Vin Vin Vout Vout VIN CIN Cout Share 1uF Figure 24. Application Schematic Design Considerations Input Source Impedance The power module should be connected to a low-impedance source. Highly inductive source impedance can affect the stability of the power module. The input capacitor CIN should be located equal distance from the two input pins of the module. CIN is recommended to be 150μF minimum. The ripple voltage is 50mV RMS at 1MHz and the capacitor should be chosen with an ESR and an RMS Current Rating for this amount of ripple voltage. When using multiple modules in parallel, a small inductor (0.2 –0.5μH) is recommended at the input of each module to prevent interaction between modules. Consult the factory for further application guidelines. Safety Considerations For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 (EN60950-1) Licensed. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maximum of 30 A fast-acting fuse in the ungrounded lead. |
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