A good PCB layout for the FAN7930BMX involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the high-current paths. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
To ensure proper thermal management, make sure to attach a heat sink to the device, and apply a thermal interface material (TIM) to the exposed pad. The heat sink should be designed to dissipate heat efficiently, and the PCB should have adequate thermal vias to dissipate heat away from the device.
The recommended input capacitor value is 10uF to 22uF, and the type should be a low-ESR ceramic capacitor, such as X5R or X7R, with a voltage rating of at least 25V.
To protect the FAN7930BMX from overvoltage and undervoltage conditions, use a voltage supervisor or a voltage monitor IC to monitor the input voltage and shut down the device if it exceeds the recommended operating range.
The recommended output capacitor value is 10uF to 22uF, and the type should be a low-ESR ceramic capacitor, such as X5R or X7R, with a voltage rating of at least 5V.
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