전기전자학회논문지 (Journal of IKEEE)

  • 제20권1호
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  • Pages.103-106
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  • 2016
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  • 1226-7244(pISSN)
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  • 2288-243X(eISSN)
한국전기전자학회 (Institute of Korean Electrical and Electronics Engineers)
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PWM 방식 벅 컨버터의 빠른 과도응답 기술

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)
  • 투고 : 2016.03.17
  • 심사 : 2016.03.24
  • 발행 : 2016.03.31
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⟨ 이전 논문 다음 논문 ⟩

초록

PWM 벅 컨버터는 3형 오차 보상기를 주로 사용하고 있다. 이 오차 보상기는 낮은 슬루율을 갖게 하는 큰 커패시터로 인해, 부하 전류의 과도응답이 발생하였을 때 부하 전압에 의도하지 않은 큰 오버슈트와 언더슈트를 발생시킨다. 또한 기준전압을 변화시켰을 때의 변화에도 느리게 응답한다. 전원장치의 효율적인 사용을 위해 다양한 부하 전류와 전압이 요구되고 있고, PWM 벅 컨버터 역시 부하 전류 변화와 기준 전압 변화에 따른 부하 전압의 빠른 응답특성을 가져야 한다. 본 논문은 PWM 벅 컨버터의 응답시간을 늘이기 위한 여러 가지 빠른 과도응답 기술들의 동작 방식과 이들 방법이 갖고 있는 장점, 한계점들을 소개한다.

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.

키워드

참고문헌

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피인용 문헌

  1. Multi-Phase Buck Converter with Fast Transient Response vol.20, pp.3, 2016, https://doi.org/10.7471/ikeee.2016.20.3.314