基于LLC諧振快速響應(yīng)LED驅(qū)動芯片的設(shè)計仿真與實現(xiàn)
發(fā)布時間：2018-08-26 21:10
【摘要】：隨著人們節(jié)能環(huán)保意識的日益增強,LED作為優(yōu)秀的綠色照明元件以其穩(wěn)定、高效的性能,受到廣泛的研究。與傳統(tǒng)照明設(shè)備直接接入市電即可驅(qū)動的使用方法不同,LED需要配合特殊的驅(qū)動電路使用,一方面給照明器件提供穩(wěn)定可靠的工作環(huán)境,另一方面也可以通過高性能的驅(qū)動電路來提高LED系統(tǒng)的效率。LED市場不斷拓展的同時也推動了LED驅(qū)動產(chǎn)業(yè)的進一步發(fā)展。在LED驅(qū)動設(shè)計領(lǐng)域中,DC/DC變換器的類型選擇將直接影響芯片驅(qū)動系統(tǒng)的效率和應(yīng)用,系統(tǒng)的環(huán)路響應(yīng)速度與穩(wěn)定性也是設(shè)計過程中需要折中處理的一對主要矛盾。針對上述問題,本文提出了一種基于LLC諧振變換且具有良好環(huán)路響應(yīng)速度的LED驅(qū)動芯片。本文首先對幾種常見DC/DC變換器的特點進行分析,通過簡單的比較提出LLC諧振變換器具有適用于本文所設(shè)計芯片系統(tǒng)的特性,在此基礎(chǔ)上著重對LLC諧振網(wǎng)絡(luò)進行較為深入的理論研究,利用波形詳細討論變換器的工作原理,分析其高效轉(zhuǎn)換的原因,再通過數(shù)學(xué)推導(dǎo)完成主要器件參數(shù)的設(shè)計工作。隨后對本文芯片設(shè)計過程中需要用到的軟件進行介紹,包括用于繪制原理圖并生成仿真網(wǎng)表的DxDesigner軟件、用于仿真并完成功能驗證的Hspice軟件和用于版圖繪制及校驗的Virtuoso和Calibre軟件。然后在LLC諧振變換架構(gòu)的基礎(chǔ)上,以上述軟件為設(shè)計平臺完成LED驅(qū)動芯片的系統(tǒng)的搭建,主要包括負載網(wǎng)絡(luò)的設(shè)計、補償網(wǎng)絡(luò)分析和芯片主要子模塊的設(shè)計和仿真,其中包括整流放大模塊、模擬調(diào)光鉗位跟隨模塊、PWM比較模塊和死區(qū)時間產(chǎn)生模塊。最后對芯片系統(tǒng)的典型應(yīng)用、PWM調(diào)光功能、模擬調(diào)光功能和環(huán)路響應(yīng)速度進行整仿驗證,同時簡單介紹亮度自動補償、錯誤檢測保護和軟啟動等輔助功能,并在版圖設(shè)計工作中,針對不同模塊的工作特點和噪聲強弱程度進行區(qū)域劃分,完成主要布局布線設(shè)計。
[Abstract]:With the increasing awareness of energy saving and environmental protection, LED, as an excellent green lighting component, has been widely studied for its stable and efficient performance. Different from the traditional lighting equipment, which can be driven by direct access to electricity, LED needs to be used with special driving circuit. On the one hand, it provides a stable and reliable working environment for lighting devices. On the other hand, the efficiency of LED system can be improved by high performance driving circuit. In the field of LED drive design, the type selection of DC / DC converter will directly affect the efficiency and application of the chip drive system. The loop response speed and stability of the system are also a pair of major contradictions that need to be compromised in the design process. In order to solve the above problems, this paper presents a LED driver chip based on LLC resonant transform with good loop response speed. In this paper, the characteristics of several common DC/DC converters are analyzed, and the characteristics of LLC resonant converters are put forward by simple comparison, which are suitable for the chip systems designed in this paper. On the basis of this, the LLC resonant network is studied deeply, the working principle of converter is discussed in detail by using waveform, the reason of its high efficiency conversion is analyzed, and the design of main device parameters is completed by mathematical derivation. Then the software used in the chip design is introduced, including DxDesigner software for drawing schematic diagram and generating simulation net table, Hspice software for simulating and completing functional verification and Virtuoso and Calibre software for layout drawing and verification. Then on the basis of LLC resonant transformation architecture, the system of LED driver chip is built based on the above software, including the design of load network, the analysis of compensation network and the design and simulation of the main sub-modules of the chip, including the design of the load network, the analysis of the compensation network and the design and simulation of the main sub-modules of the chip. It includes rectifying and amplifying module, analog dimming clamp following module, PWM comparison module and dead-time generation module. Finally, the typical application of PWM dimming function, analog dimming function and loop response speed are simulated and verified. At the same time, the auxiliary functions such as brightness automatic compensation, error detection and protection and soft start are briefly introduced, and in the layout design, some auxiliary functions, such as automatic luminance compensation, error detection and protection, and soft start up, are briefly introduced. According to the working characteristics of different modules and the degree of noise intensity, the main layout and routing design is completed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46;TM923.34
本文編號：2206164
[Abstract]:With the increasing awareness of energy saving and environmental protection, LED, as an excellent green lighting component, has been widely studied for its stable and efficient performance. Different from the traditional lighting equipment, which can be driven by direct access to electricity, LED needs to be used with special driving circuit. On the one hand, it provides a stable and reliable working environment for lighting devices. On the other hand, the efficiency of LED system can be improved by high performance driving circuit. In the field of LED drive design, the type selection of DC / DC converter will directly affect the efficiency and application of the chip drive system. The loop response speed and stability of the system are also a pair of major contradictions that need to be compromised in the design process. In order to solve the above problems, this paper presents a LED driver chip based on LLC resonant transform with good loop response speed. In this paper, the characteristics of several common DC/DC converters are analyzed, and the characteristics of LLC resonant converters are put forward by simple comparison, which are suitable for the chip systems designed in this paper. On the basis of this, the LLC resonant network is studied deeply, the working principle of converter is discussed in detail by using waveform, the reason of its high efficiency conversion is analyzed, and the design of main device parameters is completed by mathematical derivation. Then the software used in the chip design is introduced, including DxDesigner software for drawing schematic diagram and generating simulation net table, Hspice software for simulating and completing functional verification and Virtuoso and Calibre software for layout drawing and verification. Then on the basis of LLC resonant transformation architecture, the system of LED driver chip is built based on the above software, including the design of load network, the analysis of compensation network and the design and simulation of the main sub-modules of the chip, including the design of the load network, the analysis of the compensation network and the design and simulation of the main sub-modules of the chip. It includes rectifying and amplifying module, analog dimming clamp following module, PWM comparison module and dead-time generation module. Finally, the typical application of PWM dimming function, analog dimming function and loop response speed are simulated and verified. At the same time, the auxiliary functions such as brightness automatic compensation, error detection and protection and soft start are briefly introduced, and in the layout design, some auxiliary functions, such as automatic luminance compensation, error detection and protection, and soft start up, are briefly introduced. According to the working characteristics of different modules and the degree of noise intensity, the main layout and routing design is completed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46;TM923.34
【參考文獻】
相關(guān)期刊論文 前2條
1 田立東;周繼軍;秦會斌;;PWM調(diào)光LED驅(qū)動器設(shè)計[J];機電工程;2012年04期
2 蔣曉波;韓凱;沈海平;劉木清;;基于ZibBee控制的高動態(tài)范圍LED模擬調(diào)光裝置設(shè)計[J];照明工程學(xué)報;2010年06期
相關(guān)博士學(xué)位論文 前1條
1 牛全民;基于PSM模式的DC-DC功率變換器非線性建模及集成化設(shè)計[D];電子科技大學(xué);2009年
相關(guān)碩士學(xué)位論文 前1條
1 胡學(xué)青;低壓大電流高頻開關(guān)電源同步整流技術(shù)的研究[D];合肥工業(yè)大學(xué);2010年
，本文編號：2206164
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/2206164.html
最近更新
教材專著
