Switching power supply

A general term for power supply units that control output by turning it off and on through high-frequency switching using oscillators, transistors, and other components in the power circuit. The output voltage level is mainly controlled by the on-off ratio (duty cycle). Classification methods include non-resonant and resonant types, chopper-type non-isolated and isolated types, single-transistor and multi-transistor types, self-excited and separately excited types, and PWM and FM methods.

See more detailed basic explanations of switching power supplies, circuit design types, and their history