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Small-signal modeling for design of robust variable-frequency flyback battery chargers for portable device applications

Research output: Other conference contributionPaper, poster or abstractScientific


Original languageEnglish
Number of pages7
Publication statusPublished - 1 Jan 2001
Externally publishedYes
Publication typeNot Eligible
Event16th Annual IEEE Applied Power Electronics Conference and Exposition - Anaheim, CA, United States
Duration: 4 Mar 20018 Mar 2001


Conference16th Annual IEEE Applied Power Electronics Conference and Exposition
CountryUnited States
CityAnaheim, CA


A novel methodology to derive small-signal models for a peak-current controlled variable-frequency flyback converter operating in boundary mode is presented. The loop gain of a universal input 5-W battery charger for mobile phones is analyzed and compared to the predictions. The results obtained show a good correlation between predictions and measurements validating the modeling. The implications (i.e. RHP and ESR zeros as well as opto-coupler in the feedback loop) for controller design is discussed.

ASJC Scopus subject areas