Method of controlling an operation of a switch power converter
View Patent ↗Disclosed is a method of controlling an operation of a switching power converter which includes a first and second series connected transistors. Each of the transistors includes a conduction control terminal for receiving a conduction control signal. A first series of conduction control signals is applied to the control terminal of the first transistor and a second series of conduction control signals is applied to the control terminal of the second transistor, with the second series of conduction control signals being applied out of phase with respect to the first series of conduction control signals. A ratio of an input voltage to an output voltage for the series connected transistors is measured for a first spacing between an edge of a falling transition of the conduction control signal for the first transistor and an edge of a rising transition of the conduction control signal for the second transistor. The operation of the switching power converter is changed by providing a spacing having a second amount of time and the ratio of the input voltage to the output voltage for the second spacing is measured.
1. A method of controlling an operation of a switching power converter which includes first and second series connected transistors, each having a conduction control terminal for receiving a conduction control signal, the method comprising:
applying a first series of conduction control signals to the control terminal of the first transistor;
applying a second series of conduction control signals to the control terminal of the second transistor, wherein the second series of conduction conduction control signals is applied out of phase with respect to the first series conduction control signals, and an edge of a falling transition of the conduction control signal of the first transistor is spaced apart from an edge of a rising transition of the conduction control signal of the second transistor by a first amount of time;
measuring a ratio of an input voltage to an output voltage of the series connected transistors operating at the first spacing;
changing the spacing to a second amount of time and measuring a ratio of the input voltage to the output voltage for the second spacing.
2. The method according to claim 1 , further comprising:
comparing the ratio of the input voltage to the output voltage resulting from the first spacing to the ratio of the input voltage to the output voltage resulting from the second spacing; and
operating the switching power converter using the spacing between the conduction control signals applied to the first and second transistors which provides a lower input voltage to output voltage ratio.
3. The method according to claim 2 , further comprising repeating the actions periodically.