PDM2-S12-S15-S - CUI Inc.

PDM2-S12-S15-S Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal management for optimal performance?
  CUI recommends a PCB layout with a solid ground plane and a thermal pad connected to a heat sink or a thermal via to ensure efficient heat dissipation. A minimum of 2 oz copper thickness is recommended for the PCB.
• How do I ensure the DC-DC converter's reliability in high-temperature environments?
  To ensure reliability, CUI recommends derating the output power by 1.5% per degree Celsius above 50°C. Additionally, ensure proper airflow, and consider using a heat sink or thermal interface material to reduce thermal resistance.
• What is the recommended input capacitor type and value for optimal performance?
  CUI recommends using a low-ESR ceramic capacitor (X5R or X7R dielectric) with a value of 10-22 μF, depending on the input voltage and ripple requirements. The capacitor should be placed as close as possible to the input pins.
• How do I troubleshoot output voltage deviations or instability issues?
  Check the input voltage, output load, and PCB layout for any issues. Verify that the output capacitor value and type meet the recommended specifications. Also, ensure that the feedback resistors are correctly connected and meet the recommended values.
• What is the maximum allowed capacitance on the output for stable operation?
  CUI recommends limiting the output capacitance to 10 μF or less to ensure stable operation. Excessive output capacitance can cause oscillations or instability in the DC-DC converter.