I'm trying to design a buck converter using TL598. I'm studying the technical article Designing Switch Mode Power Supplies With the TL598 - Application Report for this purpose. This article references the paper The K Factor - A new mathematical tool for stability analysis and synthesis (Dean Venable) for designing the error amplifier compensation circuit and does the all calculations according to it.
The application report gives the polarity like this:
However, Dean's paper gives it like this:
Inverting Input : Fixed Reference Voltage over the Compensation Network Non-Inverting Input : Buck Converter Output Voltage
Inverting Input : Buck Converter Output Voltage over the Compensation Network Non-Inverting Input : Fixed Reference Voltage
What is the reason for this contradiction? Texas Instruments clearly states that their calculations are based on the Dean Venable's article. They are completely consistent with each other except for this input polarity detail. Which polarity is the correct one? And what is the cause for this ambiguity?