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http://dx.doi.org/10.7471/ikeee.2016.20.1.103

Fast Transient Response Techniques for PWM Buck Converter  

Seok, Jinmin (College of Information and Communication Engineering, Sungkyunkwan University)
Suh, Jung-Duk (College of Information and Communication Engineering, Sungkyunkwan University)
Kong, Bai-Sun (College of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
Journal of IKEEE / v.20, no.1, 2016 , pp. 103-106 More about this Journal
Abstract
PWM buck converters usually use a type-III error amplifier. Since this amplifier has a big capacitor with slow slew rate, they can generate an unintended large overshoot/undershoot at the output when a large load current change occurs. They can also respond slowly by varying the reference voltage. In order to increase battery lifetime, power supplies require a various range of load current and output voltage. PWM buck converter also should have a characteristic of both fast load response and reference tracking. This paper surveys a few recent techniques for reducing the settling time, and discusses their merits and limitations.
Keywords
Buck Converter; Fast transient; Reference tracking; PWM; compensation;
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