本文選題：開關(guān)電源 + 供電電路�。� 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：開關(guān)電源以其體積小、質(zhì)量輕、效率高、功耗低等顯著優(yōu)勢,被廣泛應(yīng)用于各領(lǐng)域的電子設(shè)備中,并不斷地朝著小型化、高頻化、數(shù)字化的方向發(fā)展。隨著科技地不斷發(fā)展,電子設(shè)備的功能越來越復(fù)雜,這對開關(guān)電源的性能要求也將越來越高。作為開關(guān)電源驅(qū)動控制芯片中為功能模塊提供工作電壓的電路模塊,供電模塊的性能指標(biāo)對芯片的整體性能具有決定性影響。本文首先對開關(guān)電源的背景及分類作了簡要介紹,然后對其供電電路的背景、意義及結(jié)構(gòu)進行了分析。然后介紹了現(xiàn)有文獻提出的三類開關(guān)電源驅(qū)動控制芯片供電電路,在此基礎(chǔ)上總結(jié)出開關(guān)電源驅(qū)動控制芯片供電電路的發(fā)展趨勢,即:輸入電壓范圍寬、電源噪聲抑制能力強、面積小、瞬態(tài)響應(yīng)速度快。其次,本文對開關(guān)電源驅(qū)動控制芯片供電電路的結(jié)構(gòu)、帶隙基準(zhǔn)源的結(jié)構(gòu)與原理、低壓差線性穩(wěn)壓器(Low Dropout Regulator,LDO)的結(jié)構(gòu)與原理進行了詳細分析與推導(dǎo)。針對開關(guān)電源驅(qū)動控制芯片供電電路的發(fā)展趨勢,本文設(shè)計了一種具有寬輸入電壓范圍、高電源噪聲抑制比(Power Supply Rejection Rate,PSRR)、快速瞬態(tài)響應(yīng)的供電電路。包括寬輸入電壓范圍的預(yù)穩(wěn)壓電路、具有高電源噪聲抑制比的帶隙基準(zhǔn)源、無需大電容且具有快速瞬態(tài)響應(yīng)的LDO。本文設(shè)計的具有負(fù)反饋結(jié)構(gòu)的預(yù)穩(wěn)壓電路不僅拓寬了芯片的輸入電壓范圍而且使其能夠承受更大的輸入電壓波動,帶預(yù)調(diào)節(jié)電路的帶隙基準(zhǔn)源電路不僅可以為芯片的工作提供一個穩(wěn)定的、不受溫度影響的基準(zhǔn)電壓,而且具有比傳統(tǒng)基準(zhǔn)更強的電源噪聲抑制性能。對于LDO電路的設(shè)計,本文采用了帶有調(diào)零電阻的密勒補償技術(shù)和瞬態(tài)增強技術(shù),提高了其穩(wěn)定性與瞬態(tài)響應(yīng)速度,使其在無大電容的情況下能夠在較寬的溫度范圍內(nèi)穩(wěn)定工作,并且具有良好的線性調(diào)整率和負(fù)載調(diào)整率。最后,基于0.18μmBCD工藝,利用Hspice軟件對所設(shè)計的供電電路進行了仿真。仿真結(jié)果表明:典型工藝角下,本供電電路輸入電壓范圍為6～18V,輸出電壓為5V,最大輸出電流為10mA,其線性調(diào)整率與負(fù)載調(diào)整率均小于0.01%,其靜態(tài)電流小于100μA。所有指標(biāo)均達到了設(shè)計要求。
[Abstract]:Switching power supply (SMPs) has been widely used in various fields of electronic equipment due to its advantages of small size, light weight, high efficiency and low power consumption, and has been continuously developing towards miniaturization, high-frequency and digitalization. With the development of science and technology, the functions of electronic devices are becoming more and more complex, and the performance requirements of switching power supply will be higher and higher. As the circuit module that provides the working voltage for the function module in the switch power supply drive control chip, the performance index of the power supply module has a decisive effect on the overall performance of the chip. In this paper, the background and classification of switching power supply are briefly introduced, and then the background, significance and structure of its power supply circuit are analyzed. Then, three kinds of power supply circuits of switching power supply drive and control chip are introduced. Based on this, the development trend of switching power supply drive control chip power supply circuit is summarized, that is, wide input voltage range, strong power supply noise suppression ability. The area is small and the transient response speed is fast. Secondly, the structure and principle of the power supply circuit, the structure and principle of bandgap reference source and the low voltage difference linear voltage regulator low drop out regulator LDO are analyzed and deduced in detail. In view of the development trend of power supply circuit of switch power supply drive control chip, a power supply circuit with wide input voltage range, high power supply noise suppression ratio (PSRR) and fast transient response is designed. It includes a wide input voltage range of prestable voltage circuit, a bandgap reference source with high power supply noise suppression ratio, a LDO with no large capacitance and a fast transient response. The pre-stabilized circuit with negative feedback structure not only broadens the input voltage range of the chip, but also enables it to withstand larger input voltage fluctuations. The bandgap reference circuit with preregulation circuit can not only provide a stable reference voltage which is not affected by temperature, but also have stronger power supply noise suppression performance than traditional reference circuit. For the design of LDO circuit, Miller compensation technique with zero adjusting resistance and transient enhancement technique are adopted in this paper. The stability and transient response speed of LDO circuit are improved, so that the LDO circuit can work stably in a wide temperature range without large capacitance. And has the good linearity adjustment rate and the load adjustment rate. Finally, based on 0.18 渭 m BCD process, the designed power supply circuit is simulated by HSPICE software. The simulation results show that the range of input voltage, output voltage and maximum output current of this power supply circuit are 6V 18V, 5V and 10mA, respectively. The linear adjustment rate and load adjustment rate are less than 0.01 and the static current is less than 100 渭 A. All the indexes meet the design requirements.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN86

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