【摘要】：近年來,現(xiàn)代電子科技的進(jìn)步以及人們對(duì)消費(fèi)類電子產(chǎn)品的熱切需求,不斷高推動(dòng)著智能手機(jī)、平板電腦、筆記本電腦等便攜式電子產(chǎn)品快速發(fā)展。電源作為電子產(chǎn)品正常工作的最基本支撐,能夠最直接地影響電子產(chǎn)品的續(xù)航時(shí)間和使用壽命。但是由于電子產(chǎn)品內(nèi)部集成模塊數(shù)量的增加,處理器(CPU)、顯卡芯片(GPU)等不斷向多核化、高頻化發(fā)展,顯示終端設(shè)備不斷變大和提高顯示精度,等等諸多因素使得電子產(chǎn)品的整體功耗急劇增加,在目前單電池有限的儲(chǔ)存能量下,提供更高效的電源芯片是最可行的優(yōu)化方案。此外,隨著半導(dǎo)體工藝沿著摩爾定律的快速發(fā)展,先進(jìn)的集成電路已經(jīng)開始采用20nm工藝,這使得其工作電壓會(huì)非常低,可達(dá)1V以下,可見,低壓化的電源設(shè)計(jì)也必將具有非常大的研究?jī)r(jià)值。DC-DC變換器作為一種重要的電源管理解決方案,能夠根據(jù)輸入的直流電壓進(jìn)行靈活的調(diào)整,實(shí)現(xiàn)直流降壓變換、直流升壓變換、直流升降壓變換以及反極性直流輸出變換等功能。因而,DC-DC變換器被廣泛用在數(shù)碼相機(jī)、智能手機(jī)、平板電腦等諸多電子產(chǎn)品中。本文采用遲滯控制模式的BUCK電路架構(gòu),基于0.18um BCD工藝設(shè)計(jì)一種可超低壓工作、快速響應(yīng)的BUCK變換器。該變換器最低工作電壓為1V,能在1.2V鎳氫電池或鎳鉻電池下工作,輸出電壓為0.4V到0.9V,能為工作電壓在1V以下的集成電路供電,適用于目前采用先進(jìn)深亞微米工藝集成電路的超低壓應(yīng)用;同時(shí),電路采用電源切換方式,將其最高工作電壓拓展到12V,增加其應(yīng)用范圍;此外,轉(zhuǎn)換器進(jìn)行了多種自適應(yīng)設(shè)計(jì),能夠增強(qiáng)瞬態(tài)響應(yīng),提升效率等等。本文將首先簡(jiǎn)述開關(guān)電源相關(guān)背景,介紹BUCK變換器一些重要的理論基礎(chǔ),然后根據(jù)相關(guān)理論提出自己的電路設(shè)計(jì),繼而對(duì)各個(gè)關(guān)鍵子模塊進(jìn)行具體的分析設(shè)計(jì),并基于電路仿真軟件H-SPICE對(duì)各個(gè)子模塊和整個(gè)系統(tǒng)進(jìn)行仿真驗(yàn)證,最后對(duì)論文進(jìn)行概括總結(jié)。
[Abstract]:In recent years, the rapid development of portable electronic products, such as smart phones, tablets and laptops, has been driven by the progress of modern electronic technology and the eager demand for consumer electronics. As the most basic support for the normal operation of electronic products, power supply can directly affect the life and service life of electronic products. However, due to the increase in the number of internal integration modules in electronic products, the (GPU) chip of processor (CPU), graphics card has been developing to multicore and high-frequency, and the display terminal equipment has been increasing and improving the display accuracy. Many other factors make the overall power consumption of electronic products increase dramatically. Under the limited storage energy of single cell, it is the most feasible optimization scheme to provide more efficient power chip. In addition, with the rapid development of semiconductor technology along Moore's law, advanced integrated circuits have begun to use 20nm technology, which makes its working voltage very low, up to 1 V, As an important power management solution, DC-DC converter can be adjusted flexibly according to the input DC voltage to realize DC step-down conversion and DC boost conversion. DC up-down voltage conversion and anti-polarity DC output conversion and other functions. Therefore, DC-DC converters are widely used in digital cameras, smart phones, tablets and many other electronic products. In this paper, a hysteretic control mode BUCK circuit architecture is used to design an ultra low voltage BUCK converter based on 0.18um BCD process. The minimum operating voltage of the converter is 1V, which can work under 1.2V Ni-MH battery or Ni-Cr battery, and the output voltage is 0.4V to 0.9V. The converter can supply the integrated circuit with operating voltage below 1V. It is suitable for the ultra-low voltage application of the advanced deep submicron process integrated circuit. At the same time, the circuit adopts the mode of power switching, extends its maximum working voltage to 12V, and increases its application range. In addition, the converter has a variety of adaptive design. Can enhance transient response, improve efficiency and so on. This paper first introduces the background of switching power supply, introduces some important theoretical basis of BUCK converter, then puts forward its own circuit design according to the relevant theory, and then analyzes and designs each key sub-module in detail. And based on the circuit simulation software H-SPICE, each sub-module and the whole system are simulated and verified. Finally, the thesis is summarized.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46

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