CUI recommends a PCB layout with a large copper area underneath the module, connected to a solid ground plane, to ensure efficient heat dissipation. A minimum of 2 oz copper thickness is recommended.
To ensure reliable start-up and operation with a high-capacitance output filter, CUI recommends adding a soft-start circuit or a pre-charge resistor to limit the inrush current and prevent voltage overshoot.
The VX7803-1000R can tolerate an input voltage deviation of ±10% from the nominal 24V input, which means the input voltage can range from 21.6V to 26.4V without affecting the module's performance.
While the VX7803-1000R is rated for operation up to 80°C, CUI recommends derating the output power by 2.5% per degree above 60°C to ensure reliable operation in high-temperature environments.
To implement remote sense lines, connect the sense lines to the output cables as close to the load as possible, and ensure the sense lines are twisted and shielded to minimize noise and voltage drops.
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VX7803-1000R Overview
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