BR25H160FVT-2CE2 - ROHM Semiconductor

BR25H160FVT-2CE2 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  ROHM provides a recommended PCB layout in their application note AN1191, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
• How do I ensure the buck converter's stability and prevent oscillations?
  To ensure stability, follow the recommended component values and PCB layout in the datasheet, and consider adding a damping resistor (Rd) in series with the output capacitor (Co) to prevent oscillations. Additionally, ensure that the input and output capacitors meet the recommended specifications.
• What is the maximum allowable voltage stress on the input pins during startup or shutdown?
  According to ROHM's application note AN1191, the maximum allowable voltage stress on the input pins during startup or shutdown is 20V, which is higher than the recommended operating voltage range. However, it's essential to ensure that the input voltage does not exceed this limit to prevent damage to the device.
• Can I use a different inductor value or type than recommended in the datasheet?
  While it's possible to use a different inductor value or type, it's not recommended as it may affect the converter's performance, efficiency, and stability. ROHM recommends using the specified inductor values and types to ensure optimal performance and to minimize the risk of oscillations or instability.
• How do I troubleshoot issues with the buck converter, such as output voltage deviations or instability?
  To troubleshoot issues, start by verifying the input voltage, output voltage, and current. Check the PCB layout and component values against the recommended specifications. Use an oscilloscope to monitor the output voltage and current waveforms, and consult ROHM's application notes and technical support resources for guidance.