Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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The study of PWM IC design for SMPS

SMPS 용 PWM IC 설계

  • Choi In-Chul (Dept. of Electronics, Seokyeong University) ;
  • Lim Dong-Jo (Dept. of Electronics, Seokyeong University) ;
  • Cho Han-Jo (Dept. of Electronics, Seokyeong University) ;
  • Koo Yong-Seo (Dept. of Electronics, Seokyeong University)
  • 최인철 (서경 대학교 전자공학과) ;
  • 임동주 (서경 대학교 전자공학과) ;
  • 조한주 (서경 대학교 전자공학과) ;
  • 구용서 (서경 대학교 전자공학과)
  • Published : 2004.06.01
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Abstract

In this study, we design the one-chip PWM IC for SMPS (Switching Mode Power Supply) application. We determine the IC spec. and simulated each block of PWM IC (Reference, Error amp., Comparator, Oscillator) with Smart Spice (SILVACO Circuit Simulation Tool). Reference circuits generate constant voltage(5V) in the various of power supply and temperature condition. Error amp. is designed with large DC gain (${\simeq}65dB$), unity frequency (${\simeq}190kHz$) and large PM($75^{\circ}$).Saw tooth generators operate with 20K oscillation frequency (external resistor, capacitor).

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