Murata recommends a 4-layer PCB with a solid ground plane and a separate power plane for the input and output. The input and output capacitors should be placed as close as possible to the module, and the output voltage sense lines should be routed away from the input lines to minimize noise.
To ensure reliable start-up, Murata recommends applying a slow ramp-up of the input voltage (typically 10-20 ms) and ensuring that the input voltage is within the specified range (36-75 V) before applying the enable signal.
The maximum allowable output capacitance is 2200 uF. Exceeding this value may cause instability or oscillation of the output voltage.
The 84333C is rated for operation up to 85°C ambient temperature. However, derating of the output power may be necessary for temperatures above 70°C to ensure reliable operation. Consult the datasheet for derating curves.
Check the input voltage, output load, and PCB layout for any issues. Ensure that the output voltage sense lines are properly connected and not noisy. Also, verify that the module is properly configured and that the enable signal is properly applied.
