PDQE20-Q24-D24-D - CUI Inc.

PDQE20-Q24-D24-D 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 thermal vias to dissipate heat. A minimum of 2 oz copper thickness is recommended. Additionally, a thermal interface material (TIM) with a thermal conductivity of 1 W/m-K or higher is suggested between the module and the heat sink.
• How do I ensure reliable start-up and shutdown of the module?
  To ensure reliable start-up and shutdown, CUI recommends a soft-start circuit to limit inrush current and a shutdown circuit to prevent voltage spikes. Additionally, a minimum of 10 ms turn-on and turn-off time is recommended to prevent electrical stress on the module.
• What is the maximum allowable capacitance for the output filter?
  CUI recommends a maximum output filter capacitance of 10 μF to prevent oscillation and ensure stability. Exceeding this value may lead to instability or reduced performance.
• How do I handle electromagnetic interference (EMI) and electromagnetic compatibility (EMC) with this module?
  CUI recommends following proper EMI/EMC design guidelines, including using a metal enclosure, proper grounding, and shielding. Additionally, the module's built-in EMI filter can be used to reduce emissions. Consult CUI's application notes for more information.
• What is the derating curve for high ambient temperatures?
  CUI provides a derating curve in the datasheet, which indicates the maximum output power at various ambient temperatures. For temperatures above 50°C, the output power should be derated by 2.5% per degree Celsius to ensure reliable operation.