BR68 - GeneSiC Semiconductor

BR68 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  GeneSic recommends a 2-layer or 4-layer PCB with a thermal pad connected to a large copper area on the bottom layer to dissipate heat efficiently. A minimum of 2 oz copper thickness is recommended.
• How do I ensure reliable operation at high temperatures?
  Ensure proper heat sinking, use a thermally conductive material for the heat sink, and maintain a maximum junction temperature (Tj) of 150°C. Also, consider derating the device's current rating at high temperatures.
• What is the recommended gate drive voltage and current for optimal switching performance?
  GeneSic recommends a gate drive voltage of 10-15V and a current of 1-2A to ensure fast switching times and low losses. A gate driver with a high current capability and low output impedance is recommended.
• How do I protect the BR68 from overvoltage and overcurrent conditions?
  Use a TVS diode or a zener diode to clamp the voltage, and consider adding a current sense resistor and a fuse to detect and respond to overcurrent conditions. Also, implement a gate drive circuit with built-in overcurrent protection.
• What is the recommended dead time for the BR68 in a half-bridge configuration?
  GeneSic recommends a dead time of 100-200ns to ensure proper switching and minimize shoot-through currents. The dead time may need to be adjusted based on the specific application and operating conditions.