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MDT040A0X Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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MDT040A0X Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers |
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10 / 35 page  GE Energy Preliminary Data Sheet 40A Digital Mega DLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current June 1, 2012 ©2012 General Electric Company. All rights reserved. Page 10 Design Considerations Input Filtering The 40A Digital Mega DLynxTM module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 19 shows the input ripple voltage for various output voltages at 40A of load current with 4x22 µF, 6x22µF or 8x22uF ceramic capacitors and an input of 12V. Figure 19. Input ripple voltage for various output voltages with various external ceramic capacitors at the input (40A load). Input voltage is 12V. Scope Bandwidth limited to 20MHz Output Filtering These modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 µF ceramic and 47 µF ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 20 provides output ripple information for different external capacitance values at various Vo and a full load current of 40A. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this data sheet. Figure 20. Output ripple voltage for various output voltages with external 6x47 µF, 8x47 µF or 10x47 µF ceramic capacitors at the output (40A load). Input voltage is 12V. Scope Bandwidth limited to 20MHz 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 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950- 1:2006 + A11 (VDE0805 Teil 1 + A11):2009-11; EN 60950- 1:2006 + A11:2009-03. 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 slow-blow fuse with a maximum rating of TBD in the positive input lead . 50 100 150 200 250 300 350 400 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Voltage (Volts) 4x22uF Ext Cap 6x22uF Ext Cap 8x22uF Ext Cap 0 10 20 30 40 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Voltage(Volts) 6x47uF Ext Cap 8x47uF Ext Cap 10x47uF Ext Cap |
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