VHB100W-Q24-S28 - CUI Inc.

VHB100W-Q24-S28 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal management for optimal performance?
  CUI recommends a PCB layout with a large copper area for heat dissipation, and thermal vias to connect to a heat sink or a metal core PCB. A minimum of 2oz copper thickness is recommended. Additionally, a thermal interface material (TIM) with a thermal conductivity of 1-2 W/m-K should be used between the module and the heat sink.
• How do I ensure the module's reliability and longevity in high-temperature environments?
  To ensure reliability and longevity, operate the module within the recommended temperature range (–40°C to +100°C). Implement proper thermal management, and ensure the module is not exposed to moisture, vibration, or physical stress. Regularly inspect the module for signs of wear or damage, and replace it if necessary.
• What are the EMI and RFI considerations for this module?
  The VHB100W-Q24-S28 module is designed to meet CISPR 22 Class B and FCC Part 15 Class B emissions standards. To minimize EMI and RFI, use a metal enclosure, keep the module away from sensitive circuits, and use EMI filters or shielding if necessary. Ensure proper grounding and decoupling of the module's input and output lines.
• Can I use this module in a redundant or parallel configuration?
  Yes, the VHB100W-Q24-S28 module can be used in redundant or parallel configurations to achieve higher power ratings or redundancy. However, it's essential to ensure proper synchronization and control of the modules to prevent oscillations or instability. Consult CUI's application notes or contact their technical support for guidance on implementing redundant or parallel configurations.
• What are the module's start-up and shutdown characteristics?
  The VHB100W-Q24-S28 module has a soft-start feature that limits the inrush current during start-up. The start-up time is typically around 10-20 ms. During shutdown, the module's output voltage decays rapidly to prevent back-EMF damage. The shutdown time is typically around 1-2 ms.