ZHCSL09C April   2020  – December 2020 LM7480-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Charge Pump
      2. 9.3.2 Dual Gate Control (DGATE, HGATE)
        1. 9.3.2.1 Reverse Battery Protection (A, C, DGATE)
        2. 9.3.2.2 Load Disconnect Switch Control (HGATE, OUT)
      3. 9.3.3 Overvoltage Protection and Battery Voltage Sensing (VSNS, SW, OV)
      4. 9.3.4 Low Iq Shutdown and Under Voltage Lockout (EN/UVLO)
    4. 9.4 Device Functional Modes
    5. 9.5 Application Examples
      1. 9.5.1 Redundant Supply OR-ing with Inrush Current Limiting, Overvoltage Protection and ON/OFF Control
      2. 9.5.2 Ideal Diode with Unsuppressed Load Dump Protection
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical 12-V Reverse Battery Protection Application
      1. 10.2.1 Design Requirements for 12-V Battery Protection
      2. 10.2.2 Automotive Reverse Battery Protection
        1. 10.2.2.1 Input Transient Protection: ISO 7637-2 Pulse 1
        2. 10.2.2.2 AC Super Imposed Input Rectification: ISO 16750-2 and LV124 E-06
        3. 10.2.2.3 Input Micro-Short Protection: LV124 E-10
      3. 10.2.3 Detailed Design Procedure
        1. 10.2.3.1 Design Considerations
        2. 10.2.3.2 Charge Pump Capacitance VCAP
        3. 10.2.3.3 Input and Output Capacitance
        4. 10.2.3.4 Hold-Up Capacitance
        5. 10.2.3.5 Overvoltage Protection and Battery Monitor
      4. 10.2.4 MOSFET Selection: Blocking MOSFET Q1
      5. 10.2.5 MOSFET Selection: Hot-Swap MOSFET Q2
      6. 10.2.6 TVS Selection
      7. 10.2.7 Application Curves
    3. 10.3 200-V Unsuppressed Load Dump Protection Application
      1. 10.3.1 Design Requirements for 200-V Unsuppressed Load Dump Protection
      2. 10.3.2 Design Procedure
        1. 10.3.2.1 Charge Pump Capacitance VCAP
        2. 10.3.2.2 Input and output capacitance
        3. 10.3.2.3 VS Capacitance, Resistor and Zener Clamp
        4. 10.3.2.4 Overvoltage Protection and Output Clamp
        5. 10.3.2.5 MOSFET Q1 Selection
        6. 10.3.2.6 Input TVS Selection
        7. 10.3.2.7 MOSFET Q2 Selection
      3. 10.3.3 Application Curves
    4. 10.4 Do's and Don'ts
  11. 11Power Supply Recommendations
    1. 11.1 Transient Protection
    2. 11.2 TVS Selection for 12-V Battery Systems
    3. 11.3 TVS Selection for 24-V Battery Systems
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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

3 说明

LM7480x-Q1 理想二极管控制器可驱动和控制外部背对背 N 沟道 MOSFET，从而模拟具有电源路径开/关控制和过压保护的理想二极管整流器。3V 至 65V 的宽输入电源电压可保护和控制 12V 和 24V 汽车类电池供电的 ECU。该器件可以承受并保护负载免受低至 –65V 的负电源电压的影响。集成的理想二极管控制器 (DGATE) 可驱动第一个 MOSFET 来代替肖特基二极管，以实现反向输入保护和输出电压保持。在电源路径中使用了第二个 MOSFET 的情况下，该器件允许负载断开（开/关控制）并使用 HGATE 控制提供过压保护。该器件具有可调节过压切断保护功能。LM7480-Q1 有两种型号：LM74800-Q1 和 LM74801-Q1。LM74800-Q1 使用线性稳压和比较器方案来实现反向电流阻断功能，而 LM74801-Q1 支持基于比较器的方案。通过功率 MOSFET 的共漏极配置，可以使用另一个理想二极管将中点用于 OR-ing 设计。LM7480x-Q1 的最大额定电压为 65V。通过在共源极拓扑中为器件配置外部 MOSFET，可以保护负载免受过压瞬态（例如 24V 电池系统中未抑制的 200V 负载突降）的影响。

器件信息
器件型号封装(1)封装尺寸（标称值）
LM74800-Q1、
LM74801-Q1		WSON (12)3.0mm x 3.0mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
GUID-8069E19C-C166-47BC-B78E-5B0FA3730FD0-low.gif具有开关输出的理想二极管
GUID-20201011-CA0I-WLZS-FDDV-W65MGHXBJKXC-low.gif具有 200V 负载突降保护的理想二极管