Zero-Voltage Transition in Power Converters with an Auxiliary Circuit

摘要

An auxiliary circuit may be used to assist in the operation of a power converter to obtain zero-voltage switching. For example, an auxiliary circuit including a low-voltage switch, a diode, and an inductor may be coupled to a power converter, such as a DC-to-DC buck converter or a DC-to-AC inverter or rectifier. The auxiliary circuit may consume current during transitions in the power converter to obtain zero-voltage switching.

主权项

1. An apparatus for reducing power losses associated with switch transitions, comprising:
a first switch and a second switch, wherein a first terminal of the first switch and a first terminal of the second switch are coupled to a first node; a first inductor, wherein a first terminal of the first inductor is coupled to the first node; and an auxiliary circuit, comprising: a third switch; a second inductor; and a first diode,wherein a first terminal of the auxiliary circuit is coupled to the first node and a second terminal of the auxiliary circuit is coupled to a second terminal of the first inductor.