Research and Design of a Selfadaptable Slope Compensation Circuit with Simple Structure.pdf

Research and Design of a Self-adaptable Slope Compensation Circuit with Simple Structure Yi-zhong Yang, Guang-jun Xie School of Electronic Science and Applied Physics Hefei University of Technology Hefei, Anhui Province, China rushyy @163.com Abstract-Based on CMOS process, a self-adaptable slope compensation signal during different duty cycles, using the compensation circuit used in current mode DC-DC converter is input and output voltage as the feedback control signals to proposed. The circuit can produce proper slope compensation achieve the dynamic slope compensation based on the along with the variation of input and output signals, and can characteristic of the voltage-controlled resistor when CMOS avoid the improper compensation phenomena. It not only transistor operates in the linear region, and so on. achieves the self-adaptable slope compensation, but also makes 8 9 the circuit simple, which avoids instable factors caused by the A Fixed Slope Co pensation [ . 1 m complex circuits. The simulation results show that the Fig.1 shows the wave of the inductance current h of the accuracy of slope compensation signals can exceed 88%.