APPARATUS AND METHODS FOR IMPROVING THE TRANSIENT RESPONSE CAPABILITY OF A SWITCHING POWER SUPPLY

摘要

The transient response of a switching power supply is improved by providing one or more supplemental power sources connected to the output terminal of the power supply. In one embodiment additional current is provided when a sudden increase in load current causes a corresponding decrease in output voltage. In one embodiment current is discharged when a sudden decrease in load current causes a corresponding increase in output voltage. The supplemental power sources provide a fixed current for a fixed duration. In one embodiment the current provided from the power sources is variable according to the increase or decrease in load current. In some embodiments the supplemental current is provided for a time period approximating the time required for the switching power converter coil current to equal the new load current.