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    88EM8040 参数 Datasheet PDF下载

    88EM8040图片预览
    型号： 88EM8040
    PDF下载： 下载PDF文件 查看货源
    内容描述： 功率因数校正控制器的反激式拓扑结构 [Power Factor Correction Controller for Flyback Topology]
    分类和应用： 功率因数校正控制器
    文件页数/大小： 48 页 / 445 K
    品牌： MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
     浏览型号88EM8040的Datasheet PDF文件第1页浏览型号88EM8040的Datasheet PDF文件第2页浏览型号88EM8040的Datasheet PDF文件第3页浏览型号88EM8040的Datasheet PDF文件第4页浏览型号88EM8040的Datasheet PDF文件第6页浏览型号88EM8040的Datasheet PDF文件第7页浏览型号88EM8040的Datasheet PDF文件第8页浏览型号88EM8040的Datasheet PDF文件第9页  
    Table of Contents
    Table of Contents
    Table of Contents ....................................................................................................................................... 5
    List of Figures............................................................................................................................................. 7
    List of Tables .............................................................................................................................................. 9
    1
    1.1
    1.2
    Signal Description ....................................................................................................................... 11
    Pin Configurations ...........................................................................................................................................11
    Pin Descriptions ..............................................................................................................................................11
    2
    2.1
    2.2
    2.3
    Electrical Specifications ............................................................................................................. 13
    Absolute Maximum Ratings ...........................................................................................................................13
    Recommended Operating Conditions .............................................................................................................14
    Electrical Characteristics ................................................................................................................................15
    3
    3.1
    3.2
    Functional Description................................................................................................................ 19
    Overview .........................................................................................................................................................19
    Signal Process and Functions.........................................................................................................................20
    4
    4.1
    4.2
    4.3
    4.4
    Functional Characteristics ......................................................................................................... 21
    V
    DD
    Characteristics ........................................................................................................................................21
    V
    FB
    Characteristics for Over Voltage Protection .............................................................................................23
    Switching Frequency Characteristics ..............................................................................................................24
    Over Current Threshold Characteristics..........................................................................................................25
    5
    5.1
    5.2
    Design and Applications Information ........................................................................................ 27
    Input Voltage Resistor Divider on VIN Pin.......................................................................................................28
    Isolated Voltage Loop and Output Voltage Feedback on FB Pin ....................................................................30
    5.2.1
    Resistor Divider Design for Output Voltage ......................................................................................31
    5.2.2
    Compensation Network Design ........................................................................................................31
    5.2.3
    RS2 and Rf1 Design .........................................................................................................................33
    Current Sensing and Over Current Protection ................................................................................................34
    5.3.1
    Current Sensing Through ISNS Pin ..................................................................................................34
    5.3.2
    Average Current Signal and Over Power Limitation .........................................................................35
    5.3.3
    Cycle by Cycle Current Protection through OCP Pin........................................................................36
    5.3.4
    Peak Current and Average Current Relationship .............................................................................38
    SW Pin to MOSFET Gate ...............................................................................................................................39
    VDD, Signal Ground (SGND) and Power Ground (PGND) .............................................................................39
    90W/20V Signal Stage PFC Adaptor Schematic and Bill of Materials (BOM).................................................41
    5.3
    5.4
    5.5
    5.6
    Copyright © 2009 Marvell
    October 5, 2009, Preliminary
    Document Classification: Proprietary
    Doc. No. MV-S104983-01 Rev. A
    Page 5

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