HIGH EFFICIENCY DC-DC CONVERTER WITH ACTIVE SHUNT TO ACCOMMODATE HIGH INPUT VOLTAGE TRANSIENTS

摘要

Switch mode power supplies and integrated circuits are presented to provide a DC output voltage signal using high and low side switches, with a switching control circuit to turn off the high side switch and engage an active shunt circuit to provide a reduced voltage to continue converter operation to accommodate high input voltage transients when the DC input voltage exceeds a threshold voltage without requiring an oversized low side switch for improved efficiency through reduced switching and conduction losses in normal operation.