本文選題：帶載能力 + 斜坡補(bǔ)償��； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：隨著微電子技術(shù)快速發(fā)展,各種電子設(shè)備如雨后春筍般涌現(xiàn),而電源作為電子設(shè)備的重要組成部分,其性能好壞直接決定了電子系統(tǒng)的優(yōu)劣。在移動(dòng)智能終端朝著體積越來(lái)越薄,重量越來(lái)越輕,功能越來(lái)越強(qiáng)大的方向發(fā)展的背景下,開(kāi)關(guān)電源管理芯片緊隨這一潮流,朝著低壓,大帶載能力的道路上大步邁進(jìn)。近年來(lái),各種電子設(shè)備推陳出新,對(duì)電源系統(tǒng)的帶載能力越來(lái)越苛刻。本文設(shè)計(jì)了一款寬輸入大負(fù)載電流的單片集成DC-DC開(kāi)關(guān)電源芯片,芯片內(nèi)部集成雙極性功率管,負(fù)載電流能力設(shè)計(jì)為3A,輸入電壓范圍5.5-36V,輸出電壓為5 V,固定開(kāi)關(guān)頻率500KHz。本文首先介紹了開(kāi)關(guān)電源的發(fā)展現(xiàn)狀和課題的研究意義,分析了DC-DC開(kāi)關(guān)電源基本理論,然后在DC-DC開(kāi)關(guān)電源芯片的研究基礎(chǔ)上重點(diǎn)研究如何提高系統(tǒng)的帶載能力。帶載能力的分析從理論著手,分析它們影響帶載能力的原因和過(guò)程,在此基礎(chǔ)上提出相應(yīng)的改善思想。最后在通過(guò)具體的電路模塊將這一思想付諸實(shí)踐。同時(shí),本芯片在提高轉(zhuǎn)換效率上做了諸多設(shè)計(jì)考量:采用輸出電壓對(duì)電路進(jìn)行偏置,拓?fù)渲幸蒙龎弘娙菔沟瞄_(kāi)關(guān)功率管工作在飽和區(qū)。本芯片采用的是峰值電流PWM控制結(jié)構(gòu),考慮到大負(fù)載能力的設(shè)計(jì)指標(biāo),采用分段線性斜坡補(bǔ)償并集成反斜坡補(bǔ)償電路,最大限度提高負(fù)載電流能力�；贑SMC 2μm 36 V雙極型工藝對(duì)芯片系統(tǒng)各項(xiàng)性能指標(biāo)進(jìn)行仿真驗(yàn)證,同時(shí)為驗(yàn)證集成反斜坡補(bǔ)償?shù)姆侄尉�性斜坡補(bǔ)償對(duì)芯片帶載能力有改善作用,本文還給出了一種沒(méi)有集成反斜坡補(bǔ)償?shù)姆侄尉�性斜坡補(bǔ)償電路模塊作仿真對(duì)比,其他模塊保持一致。經(jīng)仿真驗(yàn)證,包括帶載能力的各項(xiàng)指標(biāo)滿(mǎn)足設(shè)計(jì)要求。
[Abstract]:With the rapid development of microelectronic technology, a variety of electronic devices are springing up. As an important part of electronic equipment, the performance of power supply directly determines the merits and demerits of electronic system. With the development of mobile intelligent terminal towards the direction of thin volume, lighter weight and more powerful function, switching power supply management chip follows this trend and stride forward to the path of low voltage and large load capacity. In recent years, a variety of electronic equipment, the load-carrying capacity of power systems is becoming more and more demanding. In this paper, a monolithic integrated DC-DC switching power supply chip with wide input and large load current is designed. The bipolar power transistor is integrated inside the chip. The load current capacity is designed to be 3A, the input voltage range is 5.5-36V, the output voltage is 5V, and the fixed switching frequency is 500KHz. This paper first introduces the development of switching power supply and the research significance of the subject, analyzes the basic theory of DC-DC switching power supply, and then focuses on how to improve the load capacity of the system based on the research of DC-DC switching power supply chip. The analysis of carrying capacity starts with the theory, analyzes the reason and process of their influence on the load carrying capacity, and puts forward the corresponding improvement thought on this basis. Finally, this idea is put into practice through specific circuit modules. At the same time, the chip makes many design considerations to improve the conversion efficiency: the output voltage is used to bias the circuit, and the boost capacitor is used in the topology to make the switching power transistor work in the saturation region. This chip adopts the peak current PWM control structure, considering the design index of large load capacity, adopts piecewise linear slope compensation and integrated anti-ramp compensation circuit to maximize the load current capacity. Based on the CSMC 2 渭 m 36 V bipolar process, the performance indexes of the chip system are simulated and verified. The piecewise linear slope compensation with integrated anti-ramp compensation can improve the chip load capacity. In this paper, a piecewise linear slope compensation circuit without integrated anti-slope compensation is simulated and compared, and the other modules are consistent. The simulation results show that each index including load capacity meets the design requirements.
【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】：2015
【分類(lèi)號(hào)】：TM46

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相關(guān)期刊論文 前1條

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本文編號(hào)：1856978