Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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PSPICE Modeling of Commercial ICs for Switch-Mode Power Supply (SMPS) Design and Simulation

  • Yi, Yun-Jae (Major in Signal Processing, Bio Environment-Information Communication Graduate School, Hankyong National University) ;
  • Yu, Yun-Seop (Major in Signal Processing, Bio Environment-Information Communication Graduate School, Hankyong National University)
  • Received : 2010.12.07
  • Accepted : 2011.02.09
  • Published : 2011.01.01
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Abstract

PSPICE modeling of a commercial LED driver IC (TOP245P) and PC817A optocoupler is proposed for the switch-mode power supply (SMPS) (applicable to LED driver) design and simulation. An analog behavioral model of the TOP245P IC including the shunt regulator, under-voltage(UV) detection, over-voltage(OV) shut-down and SR flip-flop is developed by using PSPICE. The empirical equation of PC817A current transfer ratio (CTR) is fitted from the datasheet of PC817A. Two types of SMPSs are simulated with the averaged-model and switching-model. The simulation results by the proposed PSPICE models are in good agreement with those in the data sheet and an experimental data.

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References

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