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An optimized the PSM control mode circuit design and tapeout testing

Author: YouJian
Tutor: LiZhaoJi
School: University of Electronic Science and Technology
Course: Microelectronics and Solid State Electronics
Keywords: PSM Voltage reference source Over-temperature protection circuit Switching Power Supply
CLC: TN402
Type: Master's thesis
Year: 2008
Downloads: 106
Quote: 4
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Abstract


The research topic of this article comes from the key projects of the National Natural Science Foundation of China (No. : 60436030 ) . Cross - cycle modulation mode , PSM (Pulse Skipped Modulation) is a new modulation mode , which is the important research content PSoC (PowerSystem on Chip) . Based on this research group proposed optimization PSM modulation model , the design of a control based on the Boost topology efficiency ( > 80 %) , ripple (<30mV) chip ( PSM501 ) . The chip includes : enable control circuit voltage reference source , the current reference source , oscillator , power tube current sampling circuit , current limit comparator , over-temperature protection circuit , output voltage comparator , digital control, power transistor drive circuit of a total of ten modules. The chip uses 0.5 μm 2P3M Mixed- Signal CMOS process CSMC ( CSMC ) , and chip packaging and test results meet the design requirements . This article consists of five sections : the first part is the introduction, describes the research background and significance ; Overview of PSM modulation mode and three improved methods . The second part describes the characteristics of the PSM Modulation Mode Boost topology , and PSM and PWM two modulation mode . Expounded the control chip internal block diagram of the whole circuit works . The third section describes the sub- circuit design , including : reference voltage, over-temperature protection circuit , digital control , voltage comparator . The fourth section describes the control circuit layout , given the overall circuit test results and analysis . Reference source module for the the PSM control circuit in the paper first introduces the traditional bandgap reference source used in the control circuit , and other low-voltage , low-power circuit structure of today's international brief introduction , and a the species structure made ??their improved method , so that the temperature compensation effect has improved . For over-temperature protection module , this paper presents a novel structure and easy over-temperature protection circuit . By increasing the matching of the circuit , so that the flip level approximation of the temperature protection circuit with a threshold value regardless of the voltage . The circuit is suitable for low-voltage operation , the temperature hysteresis easy adjustment . The simulation results show that the circuit has a strong inhibitory changes in supply voltage and process parameters .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Microelectronics, integrated circuit (IC) > General issues > Design
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