The recommended PCB layout for optimal thermal performance involves placing the device on a thermal pad connected to a large copper area on the PCB, and ensuring good airflow around the device. A minimum of 2oz copper thickness is recommended. Refer to the onsemi application note AND8327/D for more details.
To ensure reliable startup, ensure that the input voltage rises monotonically and does not droop during startup. Also, ensure that the output capacitor is properly sized to handle the inrush current during startup. A soft-start circuit can also be added to reduce the inrush current.
The maximum allowed input voltage ripple for the NCP1246AD065R2G is 10% of the nominal input voltage. Exceeding this limit may affect the device's performance and reliability.
While it is possible to use a different inductor value, it is not recommended. The recommended inductor value is optimized for the device's performance and efficiency. Using a different value may affect the device's stability, efficiency, and output voltage regulation.
To troubleshoot oscillations or instability, check the PCB layout for any signs of resonance or noise coupling. Ensure that the input and output capacitors are properly sized and placed. Also, check the inductor value and ensure it is within the recommended range. If the issue persists, consult the onsemi application note AND8327/D for more troubleshooting tips.
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