VIPER28LD datasheet by STMicroelectronics

VIPER28LD Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  STMicroelectronics provides a recommended PCB layout in the application note AN4571, which includes guidelines for component placement, thermal management, and routing to minimize electromagnetic interference (EMI) and ensure reliable operation.
• How do I select the right transformer for my VIPER28LD-based design?
  The transformer selection depends on the input voltage, output voltage, and power rating of your design. STMicroelectronics provides a transformer selection guide in the datasheet, and you can also use online tools or consult with a transformer manufacturer to find a suitable transformer.
• What are the thermal management considerations for the VIPER28LD?
  The VIPER28LD has a high power density, so thermal management is crucial. Ensure good airflow around the device, use a heat sink if necessary, and follow the thermal design guidelines in the datasheet to keep the junction temperature below 150°C.
• How do I implement overvoltage protection (OVP) and undervoltage protection (UVP) with the VIPER28LD?
  The VIPER28LD has built-in OVP and UVP features, but you need to add external components to configure the thresholds and hysteresis. Refer to the datasheet and application notes for guidance on implementing OVP and UVP in your design.
• What are the EMI considerations for the VIPER28LD?
  The VIPER28LD is designed to minimize EMI, but you still need to follow good PCB design practices, such as using a solid ground plane, minimizing loop areas, and adding EMI filters if necessary. Consult the datasheet and application notes for more information on EMI mitigation.