FREQUENCY LIMITATION AND OVERLOAD DETECTION IN A VOLTAGE REGULATOR

摘要

The method describes the generation of a regulated output voltage and an output current by using a switching device for providing the output current and controlling the switching device with the first control circuit functioning in a pulse width modulation (PWM) mode and in an alternative manner with a second control circuit functioning in a pulse frequency modulation (PFM) mode, wherein a second feedback circuit is enclosed in the second control circuit and a time delay is introduced in the second feedback circuit in order to introduce a limitation of the pulse frequency.