Digital control of switched boundary mode interleaved power converter with reduced crossover distortion

Abstract

A circuit arrangement, signal processor, and method for interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an alternating input voltage from a power supply; an output to provide an output voltage to a load;a first interleaved circuit comprising: a first energy storage device; and a first controllable switching device; and one or more secondary interleaved circuits, each comprising: a secondary energy storage device; and a secondary controllable switching device; and a signal processor. The signal processor is connected to the controllable switching devices and comprises at least a first switching cycle controller, configured for cycled zero-current switching operation of the first controllable switching device; and one or more secondary switching cycle controllers, configured for cycled zero-current switching operation of the one or more secondary controllable switching devices The signal processor is configured to disable one or more of the interleaved circuits when the alternating input voltage is lower than a first threshold voltage to reduce the zero-crossing time.

Description

[0001] Related Patent Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 543,189, filed August 9, 2017, the contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present disclosure relates to power converters, and more particularly, to controlling an interleaved boundary mode power converter with reduced crossover distortion. Background technique [0004] Power converters, and in particular switched mode power converters, are used in a variety of applications to provide AC / DC and DC / DC conversion. For example, switched-mode power converters (also known as switched-mode power supplies (SMPS)) are widely used in computer and mobile phone power units to provide the necessary operating voltage from a typical 120V / 240V AC feed line. [0005] Typical concerns when designing a power converter involve conversion efficiency and cost. It should be readily apparent that power loss should...

AI Technical Summary

Problems solved by technology

In addition, typical filters for electromagnetic interference (EMI) attenuate such high-frequency components due to the high switching frequency near the zero-crossing point of the input voltage, resulting in prolonged zero-current conditions near the zero-crossing point and Distorted current waveform

Images