A good PCB layout for the L6571BD involves keeping the high-frequency switching nodes (e.g., drain and source of the power MOSFET) away from sensitive analog circuits, using a solid ground plane, and minimizing loop areas to reduce radiation. Additionally, it's recommended to use a shielded inductor and to place the IC close to the inductor to reduce radiation.
The inductor value depends on the output voltage, input voltage, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet. Then, adjust the value based on the specific application requirements, such as output voltage ripple and efficiency.
The maximum ambient temperature for the L6571BD is 85°C, but it's recommended to derate the device's power dissipation at higher temperatures to ensure reliable operation.
To ensure stability, follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, make sure to decouple the IC's power pins properly, and use a low-ESR output capacitor to minimize oscillations.
Yes, the L6571BD can be used in a synchronous rectification configuration. However, this requires additional external components and careful design to ensure proper operation and minimize losses.
L6571BD datasheet
by STMicroelectronics
