I think that it could also mean whether the PWM is forced to be
in-phase with an external source. This is sometimes used to
synchronize an SMPS with the sampling of an A to D converter so that
the switching spikes happen while the ADC is not converting.

Sean


On Sun, May 16, 2010 at 8:49 AM, Electron <electron2k4@infinito.it> wrote:
>
> Hi,
> synchronous and non-synchronous are synonims for PWM and PFM?
>
> Thanks,
> Mario
>
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