SYNCHRONIZED SELF-OSCILLATING SWITCHING REGULATOR

摘要

A periodic synchronizing signal of constant frequency is coupled to the feedback loop of a self-oscillating switching regulator to hold the switching frequency constant. The synchronizing signal is added directly to the feedback signal to drive the switch ON and OFF. The waveform of the synchronizing signal is not critical; a relaxation oscillator and a resonant circuit shock excited by the switching are shown as synchronizing signal sources.