As a result of the previous survey, it can be seen that noise leaks from the output section of the DC-DC converter. Therefore, it is expected that inserting ferrite beads into the output section will be effective. Also, it is desirable to use ferrite beads in the input section as well, since the input section is easily subjected to noise leaks.
Since the current that flows during rapid charging is high, ferrite beads with a high rated current must be selected.
In addition, select beads with high frequency characteristics to correspond to the noise of the wireless carrier frequency.
The BLE18PS series supports currents up to 8 A and achieves high impedance up to the GHz band, making it ideal for this application.