RECOM recommends a PCB layout with a large copper area connected to the module's thermal pad to ensure good heat dissipation. A minimum of 1 oz copper thickness is recommended, and the copper area should be connected to a solid ground plane to reduce thermal resistance.
To ensure reliable start-up, RECOM recommends applying a slow ramp-up of the input voltage (typically 10-20 ms) to prevent inrush currents and ensure the module's internal capacitors are charged correctly.
The maximum allowed capacitance on the output of the RPMH3.3-0.5 is 47 μF. Exceeding this value may cause instability or oscillation of the output voltage.
While the RPMH3.3-0.5 is rated for operation up to 85°C, RECOM recommends derating the output power by 2.5% per degree above 60°C to ensure reliable operation. Additionally, the module's thermal pad should be connected to a heat sink or large copper area to dissipate heat effectively.
RECOM recommends using a TVS (Transient Voltage Suppressor) diode or a varistor on the input line to protect the module from voltage transients and spikes. The TVS diode or varistor should be selected based on the maximum expected input voltage and the module's input voltage rating.
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RPMH3.3-0.5 Overview
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