PSK-20B-S5 - CUI Inc.

PSK-20B-S5 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 2oz copper thickness is recommended. Additionally, a thermal pad on the bottom of the device should be connected to a heat sink or a thermal management system.
• How do I ensure reliable operation in high-vibration environments?
  To ensure reliable operation in high-vibration environments, CUI recommends securing the device using a screw or adhesive that meets the specified torque or bonding requirements. Additionally, the PCB should be designed to minimize flexure and vibration transmission to the device.
• What is the maximum allowable voltage derating for this device?
  CUI recommends derating the input voltage by 10% to ensure reliable operation and to account for voltage tolerances. For example, if the rated input voltage is 20V, the maximum allowable voltage should be 18V.
• Can I use this device in a redundant or parallel configuration?
  Yes, the PSK-20B-S5 can be used in a redundant or parallel configuration, but it's essential to ensure that the devices are properly synchronized and that the output voltages are matched to prevent current imbalances. CUI recommends consulting with their application engineers for specific guidance.
• What is the typical MTBF (Mean Time Between Failures) for this device?
  CUI estimates the MTBF for the PSK-20B-S5 to be around 1.5 million hours at 40°C ambient temperature, based on MIL-HDBK-217F calculations. However, this value may vary depending on the specific application and operating conditions.