Vicor recommends a 4-layer PCB with a solid ground plane on the bottom layer, and a thermal relief pattern on the top layer to ensure good thermal conductivity. A minimum of 2 oz copper thickness is recommended.
To ensure reliable start-up, Vicor recommends a soft-start circuit to limit the inrush current, and a minimum input capacitance of 10uF to ensure stable operation.
The maximum allowed input voltage ripple for the FARM1C21 is 10% of the nominal input voltage. Exceeding this limit may affect the module's reliability and performance.
The FARM1C21 is rated for operation up to 100°C ambient temperature. However, Vicor recommends derating the output power by 1% per degree Celsius above 80°C to ensure reliable operation.
The FARM1C21 has a built-in voltage sense pin (VSENSE) that can be connected to a voltage monitoring circuit or a microcontroller to monitor the output voltage.
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