PQMC3-D48-D5-S - CUI Inc.

PQMC3-D48-D5-S Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  CUI recommends a 4-layer PCB with a solid ground plane and a separate layer for the input and output signals to minimize noise and EMI. A sample layout is available upon request.
• Can I use this module in a redundant or parallel configuration?
  Yes, the PQMC3-D48-D5-S can be used in redundant or parallel configurations to achieve higher power ratings or redundancy. However, it's essential to ensure proper synchronization and ORing diodes to prevent backfeed and damage to the modules.
• What is the maximum capacitance I can use on the output?
  CUI recommends a maximum output capacitance of 220uF to ensure stability and prevent oscillation. Exceeding this value may lead to instability or damage to the module.
• How do I implement overvoltage protection (OVP) with this module?
  The PQMC3-D48-D5-S has a built-in OVP feature that can be enabled by connecting the OVP pin to a voltage source. The module will shut down if the output voltage exceeds the set point. Consult the datasheet for specific implementation details.
• What is the thermal derating curve for this module?
  CUI provides a thermal derating curve in the datasheet, which shows the maximum output power vs. ambient temperature. The curve helps designers ensure the module operates within safe temperatures and power ratings.