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Digital control of power supplies - opportunities and constraints

Research output: Other conference contributionPaper, poster or abstractScientific

Details

Original languageEnglish
Pages562-567
Number of pages6
DOIs
Publication statusPublished - 1 Jan 1998
Externally publishedYes
Publication typeNot Eligible
EventProceedings of the 1998 24th Annual Conference of the IEEE Industrial Electronics Society, IECON. Part 4 (of 4) - Aachen, Ger
Duration: 31 Aug 19984 Sep 1998

Conference

ConferenceProceedings of the 1998 24th Annual Conference of the IEEE Industrial Electronics Society, IECON. Part 4 (of 4)
CityAachen, Ger
Period31/08/984/09/98

Abstract

In this paper, we present a study of the opportunities and constraints of digital control in power supplies. The advantages and disadvantages between analog and digital controllers in switched-mode power supplies are discussed in detail. The effects of a digital controller on device's reliability and integration level are also discussed. A 48 V, 500 W rectifier having a switching frequency of 100 kHz was used as a practical case example. This switched-mode rectifier consists of two converter stages, i.e., AC/DC and DC/DC converters. Dynamic characteristics for digital controllers in both converters were studied by extensive simulations. Based on the simulation results, the values of the required sampling frequencies were determined. According to the obtained results and careful analyses made in our study, it can be stated that digital control is certainly a viable alternative also in power supplies. However, before digital controllers will become dominant in high-volume power supply products, low cost microcontrollers or signal processors, which are tailored for the specific application, are needed to reduce the existing cost barrier.