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I2控制单电感双输出Buck LED驱动电源交叉影响分析

王瑶 陈玲 杨德鑫 徐利梅

王瑶, 陈玲, 杨德鑫, 徐利梅. I2控制单电感双输出Buck LED驱动电源交叉影响分析[J]. 西南交通大学学报, 2023, 58(6): 1248-1256. doi: 10.3969/j.issn.0258-2724.20220383
引用本文: 王瑶, 陈玲, 杨德鑫, 徐利梅. I2控制单电感双输出Buck LED驱动电源交叉影响分析[J]. 西南交通大学学报, 2023, 58(6): 1248-1256. doi: 10.3969/j.issn.0258-2724.20220383
WANG Yao, CHEN Ling, YANG Dexin, XU Limei. Cross Regulation Analysis of I2-Controlled Single-Inductor Dual-Output Buck LED Driver[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1248-1256. doi: 10.3969/j.issn.0258-2724.20220383
Citation: WANG Yao, CHEN Ling, YANG Dexin, XU Limei. Cross Regulation Analysis of I2-Controlled Single-Inductor Dual-Output Buck LED Driver[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1248-1256. doi: 10.3969/j.issn.0258-2724.20220383

I2控制单电感双输出Buck LED驱动电源交叉影响分析

doi: 10.3969/j.issn.0258-2724.20220383
基金项目: 四川省自然科学基金(2022NSFSC1913);中央高校基本科研业务费专项资金(ZYN2022027)
详细信息
    作者简介:

    王瑶(1987—),女,副教授,博士,研究方向为开关电源拓扑、建模与控制技术,E-mail:wangyao_zoe@foxmail.com

    通讯作者:

    陈玲(1996—),女,助教,研究方向为开关电源拓扑、建模与控制技术,E-mail:chenling_swmzu@foxmail.com

  • 中图分类号: TN312.8

Cross Regulation Analysis of I2-Controlled Single-Inductor Dual-Output Buck LED Driver

  • 摘要:

    单电感双输出(single-inductor dual-output,SIDO) Buck LED驱动电源有LED1和LED2 2条输出支路,2条输出支路间存在交叉影响. 为减小工作于电感电流连续导电模式(continuous conduction mode,CCM)的SIDO Buck LED驱动电源的输出交叉影响,提出电流-电流(current-current,I2)控制SIDO Buck LED驱动电源. 基于SIDO Buck LED驱动电源的工作原理和开关状态,采用状态空间平均法建立状态空间平均模型和小信号模型;在此基础上,分析I2控制SIDO Buck LED驱动电源的电路结构和工作原理;基于电感电流纹波和输出电流纹波,推导占空比的小信号表达式,获得交叉影响传递函数;通过交叉影响传递函数Bode图,对比分析其与电压控制SIDO Buck LED驱动电源输出支路间的交叉影响. 研究结果表明:当电压控制SIDO Buck LED驱动电源LED1输出支路的参考信号分别从1.6 V突变至0.8 V和从2.4 V突变至1.2 V 时,其LED1输出支路对LED2输出支路的交叉影响分别为0.250 A和0.365 A;反之,LED2输出支路的参考信号分别从3.2 V突变至1.6 V和从2.4 V突变至1.2 V时,LED2输出支路对LED1输出支路的交叉影响分别为0.06 A和0.04 A. 参考信号相同变化条件下,I2控制SIDO Buck LED驱动电源LED1输出支路对LED2输出支路的交叉影响分别为0.090 A和0.115 A,相反,LED2输出支路对LED1输出支路的交叉影响分别为0.030 A和0.015 A. 相比电压控制SIDO Buck LED驱动电源,I2控制SIDO Buck LED驱动电源减小了输出支路间的交叉影响.

     

  • 图 1  LED及其等效电路模型

    Figure 1.  LED and its equivalent circuit model

    图 2  SIDO Buck LED驱动电源原理

    Figure 2.  Principle of SIDO Buck LED driver

    图 3  3种开关状态的电路拓扑

    Figure 3.  Circuit topologies of three switch modes

    图 4  I2控制SIDO Buck LED驱动电源原理

    Figure 4.  Principle of I2-controlled SIDO Buck LED driver

    图 5  I2控制SIDO Buck LED驱动电源的控制时序

    Figure 5.  Control timing of I2-controlled SIDO Buck LED driver

    图 6  交叉影响传递函数Bode图

    Figure 6.  Bode plots of cross regulation transfer function

    图 7  I2控制SIDO Buck LED驱动电源实验电路

    Figure 7.  Experimental circuit of I2-controlled SIDO Buck LED driver

    图 8  iref1突变,输出电流实验波形

    Figure 8.  Experiment waveforms of output current with various iref1

    图 9  iref2突变,输出电流实验波形

    Figure 9.  Experiment waveforms of output current with various iref2

    表  1  I2控制SIDO Buck LED驱动电源电路参数

    Table  1.   Circuit parameters of I2-controlled SIDO Buck LED driver

    参数取值参数取值
    vi/V10Rs1Rs24.0
    v1/V5.6Rd11.0
    v2/V3.1Rd20.5
    i1/A0.2kp14.0
    i2/A0.8kp20.8
    C1/μF100ki13500
    C2/μF100ki2750
    L/μH100Kc11×105
    f/kHz50Kc22×105
    下载: 导出CSV

    表  2  交叉影响实验对比结果

    Table  2.   Experimental results of cross regulation

    参考信号信号变化/VI2 控制/A电压控制/A
    iref12.4→1.20.1150.365
    iref11.6→0.80.0900.250
    iref23.2→1.60.0300.060
    iref22.4→1.20.0150.040
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-30
  • 修回日期:  2022-10-25
  • 网络出版日期:  2023-06-21
  • 刊出日期:  2022-11-11

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