Ringing choke converter

A self-oscillating frequency control switching regulator. Since there is no oscillator and the DC-DC converter performs self-oscillation, if an error occurs, the duty ratio changes based on the error voltage to keep the output voltage constant. While it has the advantage of reduced cost due to fewer components, it also has the disadvantage that the operating frequency changes when the input voltage or output power changes. At the design stage, the operating frequency is an important factor. Increasing the frequency offers advantages such as smaller coils and output filters and faster response, but it also has disadvantages such as increased switching losses and reduced efficiency. Therefore, it is designed based on the most typical frequency when the input voltage is at its maximum. It is widely used in small electrical and electronic devices with low power consumption.