Neither unit met the specs on the label in terms of current supplied and voltage regulation, even the apparently more capable quick charger, which is the first ... to switch-mode power supply ...

This course introduces the basic concepts of switched-mode converter circuits for controlling and converting ... Equivalent circuit models of two non-ideal converters: a buck-boost USB power supply, ...

While he was fortunate enough that someone labeled it as having a bad power supply, things aren’t always that easy. He gives a broad explanation as to how switched mode power supplies work as ...