高效率峰值電流模降壓型開關(guān)電源轉(zhuǎn)換器XD1436的研究與設(shè)計(jì)
發(fā)布時(shí)間：2018-08-13 18:16
【摘要】：當(dāng)今世界,人們的生活、工作和社會(huì)的發(fā)展已經(jīng)離不開由電子器件組成的電子設(shè)備,其中電源管理芯片的應(yīng)用范圍十分廣泛。本論文結(jié)合芯片實(shí)際典型應(yīng)用電路,經(jīng)過詳細(xì)的理論分析后,成功的設(shè)計(jì)實(shí)現(xiàn)了一款采用恒定頻率的高效同步降壓型DC-DC轉(zhuǎn)換器XD1436。論文首先對(duì)電源管理芯片的發(fā)展背景以及發(fā)展現(xiàn)狀進(jìn)行了概述;在綜合考慮人口、能源、環(huán)境等因素的基礎(chǔ)上,總結(jié)了開關(guān)電源技術(shù)的特點(diǎn),并對(duì)其發(fā)展趨勢(shì)做出了展望;論文對(duì)開關(guān)電源的相關(guān)技術(shù)以及主要特性指標(biāo)參數(shù)進(jìn)行了詳細(xì)的介紹;由于本文設(shè)計(jì)的芯片XD1436為降壓型DC-DC轉(zhuǎn)換器,本文對(duì)DC-DC轉(zhuǎn)換器的BUCK、BOOST、BUCK-BOOST的基本電路結(jié)構(gòu)進(jìn)行了原理分析與推導(dǎo);在此基礎(chǔ)上,綜合考慮芯片功能、實(shí)際應(yīng)用情況以及工藝水平,確定了芯片XD1436的主要電特性指標(biāo)要求,選定其控制方式后,設(shè)計(jì)了整體電路的架構(gòu)。結(jié)合芯片整體工作原理及功能要求,本文對(duì)芯片XD1436進(jìn)行了系統(tǒng)級(jí)設(shè)計(jì),結(jié)合實(shí)際應(yīng)用要求,確定了芯片XD1436的主要電特性指標(biāo),并且對(duì)XD1436芯片系統(tǒng)進(jìn)行了系統(tǒng)模塊劃分,將芯片分為使能控制模塊ENABLE、電壓欠壓鎖存模塊UVLO、基準(zhǔn)電壓模塊VREF、振蕩器OSC、線性斜坡補(bǔ)償電路SLOPE、誤差放大電路EA、PWM比較器、過溫關(guān)斷保護(hù)模塊OTP、軟啟動(dòng)模塊Soft_Start、邏輯控制模塊LOGIC等17個(gè)模塊。論文給出了芯片的關(guān)鍵子電路的電路原理分析,并在此基礎(chǔ)上,對(duì)每個(gè)功能模塊以及整體電路的典型性能參數(shù)進(jìn)行了仿真驗(yàn)證。該芯片采用同步整流技術(shù),在提高了芯片轉(zhuǎn)換率的同時(shí),避免了一個(gè)外部肖特基二極管,節(jié)省了PCB板的面積;2.7V至5.5V的輸入電壓范圍,3A的最大輸出電流的特性,使得芯片XD1436成為了便攜式筆記本電腦、LCD TV、機(jī)頂盒等電子產(chǎn)品應(yīng)用的理想選擇;100%的占空比,滿足了芯片低輸出電壓紋波的要求,實(shí)現(xiàn)了低壓降操作,并延長了便攜式系統(tǒng)中電池的使用壽命;芯片的低輸出電壓紋波以及內(nèi)部采用較小的電感器和電容器,使芯片獲得了1MHz的高開關(guān)頻率,并且引入了線性斜坡補(bǔ)償技術(shù),有效避免亞諧波振蕩現(xiàn)象的出現(xiàn);欠壓鎖存、過電壓保護(hù)、過電流保護(hù)、過溫關(guān)斷等保護(hù)模塊的設(shè)計(jì),提高了該芯片的可靠性和使用壽命;采用簡(jiǎn)單的分壓結(jié)構(gòu),得到0.6V的反饋基準(zhǔn)電壓;為防止芯片啟動(dòng)過程中浪涌電流和過沖電壓對(duì)芯片造成損壞,降低其使用壽命,芯片XD1436設(shè)計(jì)了軟啟動(dòng)功能模塊。論文對(duì)XD1436系統(tǒng)及主要功能模塊進(jìn)行了詳細(xì)的理論分析,并基于0.5μmCMOS工藝,利用Cadence完成了芯片的關(guān)鍵子模塊以及整體性能的設(shè)計(jì)與前仿真驗(yàn)證。關(guān)鍵子模塊以及整體性能的仿真結(jié)果表明本文所設(shè)計(jì)的芯片XD1436各項(xiàng)性能指標(biāo)滿足設(shè)計(jì)要求,達(dá)到了預(yù)定的設(shè)計(jì)目標(biāo)。芯片XD1436內(nèi)部同步整流技術(shù),軟啟動(dòng)功能、過電壓保護(hù)、過電流保護(hù)、過溫關(guān)斷等保護(hù)模塊的設(shè)計(jì)以及內(nèi)部較小的電感器和電容器的應(yīng)用,提高了芯片XD1436的可靠性。
[Abstract]:In today's world, people's life, work and social development have been inseparable from the electronic devices, in which the power management chip is widely used. After detailed theoretical analysis, a high efficiency synchronous DC-DC converter XD1436 with constant frequency is designed and implemented in this paper. Firstly, the development background and current situation of power management chip are summarized, and the characteristics of switching power supply technology are summarized based on the comprehensive consideration of population, energy, environment and so on, and the development trend of switching power supply is prospected. The related technology and main characteristic parameters of switching power supply are introduced in detail, because the chip XD1436 designed in this paper is a step-down DC-DC converter, the basic circuit structure of DC-DC converter BUCK-BOOST is analyzed and deduced in principle. On this basis, considering the chip function, the actual application and the process level, the main electrical characteristic requirements of the chip XD1436 are determined, and the control mode is selected, and the whole circuit structure is designed. Combined with the whole working principle and function requirement of the chip, this paper designs the chip XD1436 at the system level, determines the main electrical characteristic index of the chip XD1436, and divides the system module of the XD1436 chip system. The chips are divided into enable control module (Enable), voltage under-voltage latch module (UVLOL), reference voltage module (VREF), OSCO oscillator, linear ramp compensation circuit (SLOOPEE), error amplifier circuit (EAA) PWM comparator. OTP, SoftStart, LOGIC, etc. In this paper, the circuit principle of the key sub-circuits of the chip is analyzed, and the typical performance parameters of each functional module and the whole circuit are simulated and verified. The chip adopts synchronous rectifier technology, which not only improves the conversion rate of the chip, but also avoids an external Schottky diode, and saves the characteristics of the maximum output current of the input voltage range from 2.7V to 5.5V of the PCB board. The chip XD1436 has become the ideal choice of duty cycle for portable notebook computer LCD TV, set-top box and other electronic products, which meets the requirements of low output voltage ripple of the chip, and realizes the operation of low voltage drop. The battery life of the portable system is prolonged, the low output voltage ripple of the chip and the inner inductor and capacitor are adopted, which makes the chip obtain the high switching frequency of 1MHz, and introduces the technology of linear ramp compensation. The design of under-voltage latch, over-voltage protection, over-current protection, over-temperature turn-off and other protection modules can improve the reliability and service life of the chip. The feedback reference voltage of 0.6V is obtained. In order to prevent the surge current and overshoot voltage from damaging the chip and reduce its service life, the chip XD1436 has designed the soft start function module. In this paper, the XD1436 system and its main function modules are analyzed in detail, and based on the 0.5 渭 mCMOS process, the key sub-modules of the chip and the design and pre-simulation of the whole performance are completed by using Cadence. The simulation results of the key sub-modules and the overall performance show that the performance indexes of the chip XD1436 designed in this paper meet the design requirements and achieve the intended design objectives. The design of XD1436 internal synchronous rectifier technology, soft start function, over-voltage protection, over-current protection, over-temperature turn-off and the application of smaller inductor and capacitor can improve the reliability of chip XD1436.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46
本文編號(hào)：2181794
[Abstract]:In today's world, people's life, work and social development have been inseparable from the electronic devices, in which the power management chip is widely used. After detailed theoretical analysis, a high efficiency synchronous DC-DC converter XD1436 with constant frequency is designed and implemented in this paper. Firstly, the development background and current situation of power management chip are summarized, and the characteristics of switching power supply technology are summarized based on the comprehensive consideration of population, energy, environment and so on, and the development trend of switching power supply is prospected. The related technology and main characteristic parameters of switching power supply are introduced in detail, because the chip XD1436 designed in this paper is a step-down DC-DC converter, the basic circuit structure of DC-DC converter BUCK-BOOST is analyzed and deduced in principle. On this basis, considering the chip function, the actual application and the process level, the main electrical characteristic requirements of the chip XD1436 are determined, and the control mode is selected, and the whole circuit structure is designed. Combined with the whole working principle and function requirement of the chip, this paper designs the chip XD1436 at the system level, determines the main electrical characteristic index of the chip XD1436, and divides the system module of the XD1436 chip system. The chips are divided into enable control module (Enable), voltage under-voltage latch module (UVLOL), reference voltage module (VREF), OSCO oscillator, linear ramp compensation circuit (SLOOPEE), error amplifier circuit (EAA) PWM comparator. OTP, SoftStart, LOGIC, etc. In this paper, the circuit principle of the key sub-circuits of the chip is analyzed, and the typical performance parameters of each functional module and the whole circuit are simulated and verified. The chip adopts synchronous rectifier technology, which not only improves the conversion rate of the chip, but also avoids an external Schottky diode, and saves the characteristics of the maximum output current of the input voltage range from 2.7V to 5.5V of the PCB board. The chip XD1436 has become the ideal choice of duty cycle for portable notebook computer LCD TV, set-top box and other electronic products, which meets the requirements of low output voltage ripple of the chip, and realizes the operation of low voltage drop. The battery life of the portable system is prolonged, the low output voltage ripple of the chip and the inner inductor and capacitor are adopted, which makes the chip obtain the high switching frequency of 1MHz, and introduces the technology of linear ramp compensation. The design of under-voltage latch, over-voltage protection, over-current protection, over-temperature turn-off and other protection modules can improve the reliability and service life of the chip. The feedback reference voltage of 0.6V is obtained. In order to prevent the surge current and overshoot voltage from damaging the chip and reduce its service life, the chip XD1436 has designed the soft start function module. In this paper, the XD1436 system and its main function modules are analyzed in detail, and based on the 0.5 渭 mCMOS process, the key sub-modules of the chip and the design and pre-simulation of the whole performance are completed by using Cadence. The simulation results of the key sub-modules and the overall performance show that the performance indexes of the chip XD1436 designed in this paper meet the design requirements and achieve the intended design objectives. The design of XD1436 internal synchronous rectifier technology, soft start function, over-voltage protection, over-current protection, over-temperature turn-off and the application of smaller inductor and capacitor can improve the reliability of chip XD1436.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46
【參考文獻(xiàn)】
相關(guān)碩士學(xué)位論文 前2條
1 劉彬;基于PWM控制模式的電流型DC-DC降壓轉(zhuǎn)換器的研究[D];西安電子科技大學(xué);2008年
2 謝應(yīng)孝;Buck型DC/DC開關(guān)電源的研究與設(shè)計(jì)[D];黑龍江大學(xué);2010年
，本文編號(hào)：2181794
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/2181794.html
最近更新
教材專著
