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Small-signal modelling of peak current-mode controlled buck-derived circuits

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2 Author(s)
Al-Mothafar, M.R.D. ; Dept. of Electr. Eng., Jordan Univ. of Sci. & Technol., Irbid, Jordan ; Hammad, K.A.

Two averaged techniques are compared for the small-signal modelling of constant-frequency pulse-width modulated peak current-mode controlled buck-based DC-DC converters operating in the continuous-current conduction mode. Both techniques are employed to derive explicit expressions of the major small-signal transfer functions for the modular-converter examples taken. Large-signal transients predicted using the more accurate pulse-by-pulse simulation are also presented to aid the comparison. The two techniques are the new continuous-time technique and the unified technique

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Electric Power Applications, IEE Proceedings -  (Volume:146 ,  Issue: 6 )