Data Sheet

Module：EWN-8258FAT1CA1
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2 Power supply requirement
Th
e module power supply voltage is DC+3.3V. The power supply design needs to consider the
output current and power interference. The power supply current design needs to reserve 50mA. To
avoid the +3.3V power supply from interfering with other circuits on the motherboard, it is
recommended to supply to the module using the regulator circuit alone. the recommended DC-DC
circuit structure shown in the figure below. A 4.7uF~10uF capacitor is connected in parallel at 3_3VD
output to filter out the interference. A bead is connected in series at 3_3VD output. The bead and
capacitor must be placed as close to the module as possible. If you need to share +3.3V with other
circuits, consider whether the current of the shared power supply is sufficient.
Fig 10 Power supply Circuit schematic