A power tip that discusses how to address highly integrated USB PD charger design constraints with a self-biasing circuit.

you’ll probably use a DC to DC converter. Really, these converters generate some sort of AC waveform and then use either an inductor or a transformer to boost or buck the voltage as desired.

And at the time, the AC transformer was the only way viable to step up and down voltages. No, not that AC/DC But that was then. We’re right now on the cusp of a power-generation revolution ...