Switch control for controlling switch arrangements of a power converter based on efficiency

摘要

The present invention relates to a power converter (1, 1′) comprising an input terminal (+IN, −IN) connected to an input power source, at least an input switch arrangement (T1, T2; T10, T12), and an output terminal (+OUT, −OUT). The input switch arrangement (T1, T2; T10, T12) is arranged to convert the input power, where the power converter (1) further comprises a control unit (P1, N1) that is arranged to control at least the input switch arrangement (T1, T2; T10, T12). The control unit (P1, N1) is arranged to perform said control of the input switch arrangement (T1, T2; T10, T12) in dependence of the efficiency of at least a part of the power converter, the control unit (P1, N1) having information regarding the power at the input terminal (+IN, −IN) and the power at the output terminal (+OUT, −OUT). The present invention also relates to a corresponding method.

主权项

1. A buck power converter comprising:
an input terminal connected to an input power source and having a first input end and a second input end; an input switch arrangement comprising a first input switch and a second input switch, wherein the first input switch is connected to the first input end and the second input switch is connected to the second input end; an output terminal having a first output end and a second output end, wherein the second input end of the input terminal is connected to the second output end of the output terminal; an inductor that connects the first output end and a point between the first input switch and the second input switch; a control unit arranged to optimize a dead time in which neither the first input switch or the second input switch is conducting, by turning on and turning off of the input switch arrangement based on a power measured at the input terminal and a power measured at the output terminal; and one or more hall sensors in communication with the control unit and configured to measure power at the input terminal and to measure power at the output terminal.