Noise suppression and stability in the overcurrent Limited mode of the switching power supply

摘要

The steady state and dynamic characteristics in the overcurrent limited mode of the dc-dc converter with energy storage reactor are analyzed theoretically and experimentally. It is revealed that foldback current limiting, constant current and voltage drooping characteristics are realized when the dc gain of the overcurrent limiting control circuit is larger than, equal to and less than unity, respectively, and that the stability in the overcurrent limited mode can be improved by employing a derivative compensator and smaller inductance of the energy storage reactor.