switching power supply

A general term for power supply devices that control output by turning off and on using high-frequency switching with components such as oscillators and transistors in the power circuit. The output voltage is mainly controlled by the ratio of on to off time (duty cycle). There are classification methods such as non-resonant and resonant types, non-isolated and isolated chopper types, single-transistor and multi-transistor types, self-excited and externally excited types, PWM and FM methods.

See a more detailed basic explanation of switching power supplies, circuit design types, and history