新型單電感多輸出BOOST型DC-DC轉(zhuǎn)換器的研究與實(shí)現(xiàn)
[Abstract]:With the rapid development of electronic products, the internal circuit becomes more complex and the integrated module is more and more. The single inductor multi output DC-DC converter can realize the multichannel output voltage only with one inductor, which can obviously reduce the product volume and reduce the cost. Therefore, it is of great significance to its research. A new design is designed in this paper. The type of single inductor multiple output BOOST type DC-DC converter. In order to overcome the cross interference between different output voltages, the traditional single inductor multiple output converters mostly use TM timing control and DCM working mode. In this paper, a new type of OPDC timing control and adaptive PCCM mode is used in this paper, which can not only effectively suppress cross drying. In this paper, the topology, working mode and cross interference of the single inductor multiple output DC-DC converter are deeply analyzed and studied. On the basis of this, the adaptive PCCM mode and OPDC timing control are emphasized. The principle and advantages of the PCCM mode power level are modeled and analyzed. Then, a PCCM mode single inductor three output DC-DC converter with four stage dynamic adjustment function is designed, and the related circuit modules are designed. In the design, several measures are taken to suppress the cross interference problem; finally, the whole system is designed. The design is based on the simulation and function verification. The design is based on the CSMC0.25 micron m BCD process library. The switching frequency is 1MHz and the input voltage range is 2.2V~3.2V. The output voltage of the three road is designed to be 3.3V, 4V, 5V, and the conversion efficiency is higher than 80%. The simulation results show that the system can output a stable working voltage of three paths in a larger load range, and the system can simultaneously deliver the operating voltage at the same time. The problem of fork jamming has also been effectively controlled, and has achieved the design requirements.
【學(xué)位授予單位】:西安理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TM46
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