System and method for controlling a converter
AssigneeInfineon Technologies Austria AG
InventorsHolger Kapels, Gerald Deboy
Life of this patent
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Abstract
A system and method for controlling a converter. One embodiment provides the cyclic actuation of a first switching element, used for applying an input voltage to an inductive storage element. A second switching element is used as a first rectifier element in a rectifier arrangement, in a step-up converter. An actuating circuit is provided for the first and second switching elements.
Claims15
A method for controlling a converter, including the cyclic actuation of a first switching element for applying an input voltage to an inductive storage element, and a second switching element, used as a first rectifier element in a rectifier arrangement, comprising:
- turning on the first switching element for a first turned-on period, during which the second switching element is off;
- turning on the second switching element at the end of the first turned-on period or after the end of the first turned-on period for a second turned-on period;
- monitoring a current flowing through the second switching element or the inductive storage element during the second turned-on period;
- and
- terminating the second turned-on period following a change in current direction of the current from a first current direction to an opposite second current direction.
A circuit comprising:
- an actuating circuit configured for generating a first actuation signal for a first switching element, used for applying an input voltage to an inductive storage element, and a second actuation signal for a second switching element, used as a first rectifier element in a rectifier arrangement, in a step-up converter;
- and
- wherein the actuating circuit is configured so that during an actuation cycle it
- generates a turn-on level for the first actuation signal for a first turned-on period and generates a turn-off level for the second actuation signal during this first turned-on period,
- generates a turn-on level for the second actuation signal at the end of the first turned-on period or after the end of the first turned-on period for a second turned-on period, and
- monitors a current flowing through the second switching element or the inductive storage element during the second turned-on period, and terminates the second turned-on period after a change in the current direction of this current from a first current direction to an opposite second current direction has been detected.
Dependencies are inferred from the claim text.