ZHCSA24H February   2013  – June 2017 LM5122

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings: LM5122, LM5122Z
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Undervoltage Lockout (UVLO)
      2. 7.3.2  High Voltage VCC Regulator
      3. 7.3.3  Oscillator
      4. 7.3.4  Slope Compensation
      5. 7.3.5  Error Amplifier
      6. 7.3.6  PWM Comparator
      7. 7.3.7  Soft-Start
      8. 7.3.8  HO and LO Drivers
      9. 7.3.9  Bypass Operation (VOUT = VIN)
      10. 7.3.10 Cycle-by-Cycle Current Limit
      11. 7.3.11 Clock Synchronization
      12. 7.3.12 Maximum Duty Cycle
      13. 7.3.13 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 MODE Control (Forced-PWM Mode and Diode-Emulation Mode)
      2. 7.4.2 MODE Control (Skip-Cycle Mode and Pulse-Skipping Mode)
      3. 7.4.3 Hiccup-Mode Overload Protection
      4. 7.4.4 Slave Mode and SYNCOUT
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Feedback Compensation
      2. 8.1.2 Sub-Harmonic Oscillation
      3. 8.1.3 Interleaved Boost Configuration
      4. 8.1.4 DCR Sensing
      5. 8.1.5 Output Overvoltage Protection
      6. 8.1.6 SEPIC Converter Simplified Schematic
      7. 8.1.7 Non-Isolated Synchronous Flyback Converter Simplified Schematic
      8. 8.1.8 Negative to Positive Conversion
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Custom Design With WEBENCH® Tools
        2. 8.2.2.2  Timing Resistor RT
        3. 8.2.2.3  UVLO Divider RUV2, RUV1
        4. 8.2.2.4  Input Inductor LIN
        5. 8.2.2.5  Current Sense Resistor RS
        6. 8.2.2.6  Current Sense Filter RCSFP, RCSFN, CCS
        7. 8.2.2.7  Slope Compensation Resistor RSLOPE
        8. 8.2.2.8  Output Capacitor COUT
        9. 8.2.2.9  Input Capacitor CIN
        10. 8.2.2.10 VIN Filter RVIN, CVIN
        11. 8.2.2.11 Bootstrap Capacitor CBST and Boost Diode DBST
        12. 8.2.2.12 VCC Capacitor CVCC
        13. 8.2.2.13 Output Voltage Divider RFB1, RFB2
        14. 8.2.2.14 Soft-Start Capacitor CSS
        15. 8.2.2.15 Restart Capacitor CRES
        16. 8.2.2.16 Low-Side Power Switch QL
        17. 8.2.2.17 High-Side Power Switch QH and Additional Parallel Schottky Diode
        18. 8.2.2.18 Snubber Components
        19. 8.2.2.19 Loop Compensation Components CCOMP, RCOMP, CHF
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 使用 WEBENCH® 工具定制设计方案
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

4 修订历史记录

Changes from G Revision (May 2016) to H Revision

  • Changed 更改了本商用数据表，将汽车数据表从中分离出来Go
  • Added 24 引脚 HTTSOP 封装选项Go
  • Added WEBENCH 链接 Go
  • Added 24-HTSSOP pin configurationGo
  • Added 24-HTSSOP Functions Go
  • Added LM5122Z part number Go
  • Changed 20-HTSSOP Thermal Information and added 24-HTSSOP thermal valuesGo
  • Added ICSP –ICSN (LM5122Z only) specsGo
  • Added No load, 50% to 50% (LM5122Z only) specsGo
  • Added 24-pin HTSSOPGo
  • Added Negative to Positive conversion exampleGo

Changes from F Revision (May 2015) to G Revision

  • Added 汽车 ESD 特性Go
  • Added paragraph and second equation Go
  • Changed equation Go

Changes from E Revision (December 2014) to F Revision

  • Changed Handling Ratings to ESD Ratings and moved Storage temperature to Absolute Max Ratings Go
  • Added Ohm symbol in Current Sense Resistor RS equation 28Go
  • Changed typo to reflect an Ohm symbol in Current Sense Resistor RS equation 29Go

Changes from D Revision (September 2013) to E Revision

  • Added 引脚配置和功能 部分、处理额定值 表、特性 说明 部分、器件功能模式、应用和实施 部分、电源相关建议 部分、布局 部分、器件和文档支持 部分以及机械、封装和可订购信息 部分Go

Changes from C Revision (August, 2013) to D Revision

  • Changed 5 kΩ to 20 kΩGo
  • Changed CCOMP to CHF Go

Changes from B Revision (May, 2013) to C Revision

  • Deleted Package AddendumGo

Changes from A Revision (May, 2013) to B Revision

  • Deleted Device Info tableGo

Changes from * Revision (March, 2013) to A Revision

  • Released full datasheet.Go
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