494R7SC datasheet by Murata Power Solutions

494R7SC Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  Murata recommends a PCB layout with a solid copper plane underneath the module, and thermal vias connecting the plane to the module's thermal pads. This helps to dissipate heat efficiently and reduce thermal resistance.
• How do I ensure reliable start-up of the converter under all operating conditions?
  To ensure reliable start-up, Murata recommends using a soft-start circuit or a ramp-up circuit to limit the inrush current during power-on. Additionally, the input voltage should be stabilized before applying it to the converter.
• What is the maximum allowable capacitance on the output of the converter?
  The maximum allowable capacitance on the output of the 494R7SC is 2200uF. Exceeding this value may cause instability or oscillation in the converter.
• Can I use the 494R7SC in a high-temperature environment?
  The 494R7SC is rated for operation up to 85°C ambient temperature. However, derating may be necessary for temperatures above 70°C. Consult the datasheet for derating curves and guidelines for high-temperature operation.
• How do I troubleshoot issues with the converter's output voltage regulation?
  To troubleshoot output voltage regulation issues, check the input voltage, output load, and feedback circuitry. Ensure that the feedback resistors are correctly selected and that the output voltage sense lines are properly connected. Consult the datasheet for troubleshooting guidelines and application notes.