A good PCB layout for the BD711 involves keeping the input and output traces separate, using a solid ground plane, and placing the device close to the power source. Additionally, using a shielded inductor and placing it away from the device can help reduce EMI.
To ensure the BD711 operates within the SOA, monitor the device's junction temperature, input voltage, and output current. Make sure to follow the recommended thermal design and heat sink requirements, and avoid exceeding the maximum ratings for voltage and current.
A low-ESR ceramic capacitor (X5R or X7R) with a value between 4.7uF to 10uF is recommended for the input capacitor. This helps to filter out noise and ensure stable operation.
The optimal switching frequency for the BD711 depends on the application's requirements. A higher switching frequency can reduce the size of the inductor and capacitor, but may increase switching losses. A lower switching frequency can reduce switching losses, but may require larger components. Experiment with different frequencies to find the optimal balance for your application.
A low-ESR ceramic capacitor (X5R or X7R) with a value between 10uF to 22uF is recommended for the output capacitor. This helps to filter out noise and ensure stable output voltage.
BD711 datasheet
by STMicroelectronics
