Modeling
[104] Current Mode Control Book
Updated version of Dr. Ridley's definitive Current-Mode Control Book
[098a] Vorperian's Coupled-Sepic Analysis Notes
Dr. Vorperian's hand-written analysis of the tightly-coupled sepic converter.
[098] Small Signal Modeling of the Tightly-Coupled Sepic Converter
Dr. Vorperian's analysis of the tightly-coupled sepic converter.
[S01] Sepic Full Analysis
The complete analysis of the Sepic converter – the only place where this can be found. By Dr. Vorpérian.
[S04] PFC Small Signal
How to analyze the low-frequency plant characteristics of a PFC circuit.
[A16] Ripple Theorem
Vorpérian’s amazing ripple theorem generates ripple currents and voltages from the small-signal switch model.
[096] Current-Mode History and Loose Ends Part V – The Correct Modulator Gain
The correct modulator gain is confirmed by experiment. Different analysis results are completely resolved when choosing the right modulator gain.
[A09] Analyzing The Sepic Converter
Summarizing the main features of the Sepic control characteristics.
[095] Current-Model History and Loose Ends Part IV – Infinite Gain Model
Papers from MIT and others indicate a current loop gain of infinity under all conditions, clearly an impossibility according to Nyquist.
[094] Current-Mode History and Loose Ends Part III – Lee’s Model
Dr. Lee's early papers indicated a current loop crossover approaching infinity at D=0.5, violating Nyquist priciples by a large margin.
[093] Current-Mode History and Loose Ends Part II – Middlebrook’s Model
Dr. Middlebrook's early paper on current mode indicated a current loop crossover above half the switching frequency, violating Nyquist priciples.
[092] Current-Mode History and Loose Ends Part I
Confusion and errors in calculating the current modulator loop gain are resolved in this series.
[070] Tapped Boost Converter Modeling
Using the switch model to analyze the tapped boost converter.
[069] PWM Switch Model Review
A review of Vorperian's PWM switch model which completely changed the task of converter modeling.
