The recommended PCB layout for optimal thermal performance involves placing the converter on a multi-layer board with a solid ground plane, using thermal vias to dissipate heat, and keeping the input and output capacitors close to the converter.
To ensure reliable start-up and shutdown, ensure that the input voltage is within the specified range, the input capacitor is properly sized, and the enable pin is properly driven. Also, ensure that the output voltage is monitored and the converter is shut down if the output voltage exceeds the specified range.
The derating curves for the converter's power rating can be obtained from the manufacturer or can be calculated based on the thermal performance data provided in the datasheet. Typically, the power rating is derated by 1-2% per degree Celsius above the maximum operating temperature.
To mitigate EMI, ensure that the converter is placed in a shielded enclosure, use a common-mode choke on the input, and add EMI filters on the input and output lines. Additionally, ensure that the PCB layout is optimized for EMI reduction.
The recommended input and output capacitors for this converter are low-ESR capacitors with a voltage rating that exceeds the maximum input and output voltages. The capacitance value depends on the specific application requirements, but typically ranges from 10uF to 100uF.
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