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To help eliminate beat noise, some SWIFT DC/DC converters can be synchronized to an external clock frequency. The bottom waveform shows 2 signals switching at slightly different frequencies. The difference is shown by the low beat frequency red line. This low beat frequency can show up in several places on the circuit board as a nuisance. Synchronizing the switching frequencies can eliminate this beat noise and is successfully implemented in noise sensitive applications, such as medical imaging and audio end equipments. Connect the sync pin of the DC/DC converters to the master clock and all will switch at the same frequency.
PTM Published on: 2011-11-10
