Vicor recommends a 4-layer PCB with a solid ground plane, and thermal vias under the module to dissipate heat. A thermal interface material (TIM) should be used between the module and the heat sink.
To ensure reliable start-up and shutdown, Vicor recommends a soft-start circuit to limit inrush current, and a shutdown circuit to discharge the output capacitors. Additionally, a minimum load is required during start-up to prevent oscillation.
Derating curves are available in the Vicor application note AN-103. The curves provide guidance on reducing the output power based on ambient temperature, input voltage, and output current to ensure reliable operation.
Vicor recommends checking the input voltage, output load, and thermal management. Verify that the module is properly soldered and that the PCB layout meets Vicor's recommendations. Consult the Vicor application notes and technical support for further assistance.
The VTM48EF240T012A00 is designed to meet CISPR 22 and EN 55022 Class B emissions standards. To ensure compliance, Vicor recommends using a shielded enclosure, minimizing PCB trace lengths, and using EMI filters and common-mode chokes as needed.
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