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Design of a Transition Mode APFC Controller Based on BCD Process

Author: PengCheng
Tutor: ShiLingFeng
School: Xi'an University of Electronic Science and Technology
Course: Control Theory and Control Engineering
Keywords: Power factor correction Transition mode PFC control chip BCD process
CLC: TM46
Type: Master's thesis
Year: 2011
Downloads: 73
Quote: 0
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Abstract


With modern power electronics technology, a variety of electrical equipment on the grid caused by increasing pollution, in order to improve the efficiency and reduce the switching power grid pollution and power factor correction (PFC) research and applications are becoming the power electronics field focus. Power factor as a measure of the quality of a power main parameters of the power factor correction of various important selection basis. Active power factor correction technology can not only get a higher power factor and low total harmonic distortion (THD), and can operate over a wide voltage range, has become the main method to improve power factor. Step-Up (Boost) circuit is an active power factor correction control circuit is often used circuit topology. This article from the current research in the field of power electronics hot starting, designed a work in transition mode current-mode control of active power factor correction controller. Paper first describes the power factor correction technology development and the status quo, and then introduced the power factor correction circuit topology technology adoption and implementation. According to the chip application and index requirements, detailed analysis and comparison of the characteristics of a variety of methods to determine the use of the work in the transition mode current type active power factor correction control methods. On this basis proposed for the current mode control of Boost PFC control chip XD2656. The working principle of design for XD2656 the overall framework of the chip, and then the overall function completed sub-circuit design and simulation module and chip in a typical application circuit simulation and testing. In order to make the chip switching power supply circuit applications with low power consumption and higher reliability starting at chip integrates undervoltage lockout circuit and overvoltage protection circuit; another chip also joined the THD optimized multiplier circuit reduces the input current total harmonic distortion in order to obtain a better power factor. In this paper, chip 0.4μm 40V BCD process design, using Hspice and Cadence simulation software, and design sample application circuit board to be tested. XD2656 from the simulation results can be seen in the Boost power factor correction circuit to achieve the purpose, and in the actual circuit has been tested high power factor and low THD, circuit functions and indicators meet the design requirements.

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