System and Method for Controlling a Power Supply

摘要

In accordance with an embodiment, a controller for a switched mode power supply includes an average current comparator that determines whether an average current within the switched mode power supply is below a current threshold, and a switch signal generation circuit coupled to the average current comparator having switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply. The switch signal generation circuit produces a first switching pattern in a first mode of operation and produces a second switching pattern a second mode of operation. When the average current comparator determines that the average current is below the current threshold, the switch signal generation circuit is operated in a first mode, and when the average current comparator determines that the average current is not below the current threshold, the switch signal generation circuit is operated in a second mode.

主权项

1. A controller for a switched mode power supply comprising:
an average current comparator configured to determine whether an average current within the switched mode power supply is below a current threshold; and a switch signal generation circuit coupled to the average current comparator, the switch signal generation circuit comprising switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply, wherein the switch signal generation circuit is configured to:
produce a first switching pattern at the switch signal outputs in a first mode of operation when the average current comparator determines that the average current is below the current threshold, andproduce a second switching pattern at the switch signal outputs in a second mode of operation when the average current comparator determines that the average current is not below the current threshold.