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JNW350R64-18 Datasheet(PDF) 6 Page - Lineage Power Corporation |
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JNW350R64-18 Datasheet(HTML) 6 Page - Lineage Power Corporation |
6 / 15 page Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output LINEAGE POWER 6 Test Configurations Note: Measure the input reflected-ripple current with a simulated source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure the current, as shown above. Figure 7. Input Reflected Ripple Current Test Setup. Note: Use a Cout (470 µF Low ESR aluminum or tantalum capacitor typical), a 0.1 µF ceramic capacitor and a 10 µF ceramic capacitor, and Scope measurement should be made using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. Figure 8. Output Ripple and Noise Test Setup. Note: All measurements are taken at the module terminals. When socketing, place Kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. Figure 9. Output Voltage and Efficiency Test Setup. Design Considerations Input Source Impedance The power module should be connected to a low ac-impedance source. A highly inductive source impedance can affect the stability of the power module. For the test configuration in Figure 7, a 470μF Low ESR aluminum capacitor, CIN , mounted close to the power module helps ensure the stability of the unit. Consult the factory for further application guidelines Output Capacitance The JNW350R power module requires a minimum output capacitance of 440µF Low ESR aluminum capacitor, Cout to ensure stable operation over the full range of load and line conditions, see Figure 8. If the ambient temperature is under -20C, it is required to use at least 3 pcs of minimum capacitors in parallel. In general, the process of determining the acceptable values of output capacitance and ESR is complex and is load-dependant. Safety Considerations For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL60950-1, CSA C22.2 No. 60950-1- 03, EN60950-1 and VDE 0805:2001-12. For end products connected to –48V dc, or –60Vdc nominal DC MAINS (i.e. central office dc battery plant), no further fault testing is required. *Note: -60V dc nominal battery plants are not available in the U.S. or Canada. For all input voltages, other than DC MAINS, where the input voltage is less than 60V dc, if the input meets all of the requirements for SELV, then: The output may be considered SELV. Output voltages will remain within SELV limits even with internally-generated non-SELV voltages. Single component failure and fault tests were performed in the power converters. One pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within ELV or SELV limits. However, SELV will not be maintained if VI(+) and VO(+) are grounded simultaneously. |
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