ZHCSJQ0A may   2019  – july 2023 LM5108

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable
      2. 7.3.2 Start-up and UVLO
      3. 7.3.3 Input Stages and Interlock Protection
      4. 7.3.4 Level Shifter
      5. 7.3.5 Output Stage
      6. 7.3.6 Negative Voltage Transients
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Select Bootstrap and VDD Capacitor
        2. 8.2.2.2 Estimate Driver Power Losses
        3. 8.2.2.3 Selecting External Gate Resistor
        4. 8.2.2.4 Delays and Pulse Width
        5. 8.2.2.5 External Bootstrap Diode
        6. 8.2.2.6 VDD and Input Filter
        7. 8.2.2.7 Transient Protection
      3. 8.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 第三方产品免责声明
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表
  13. 12Mechanical, Packaging, and Orderable Information

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7.3.3 Input Stages and Interlock Protection

The two inputs operate independently, with an exception that both outputs will be pulled low when both inputs are high or overlap. The independence allows for full control of two outputs compared to the gate drivers that have a single input. The device has input interlock or cross-conduction protection. Whenever both the inputs are high, the internal logic turns both the outputs off. Once the device is in shoot-through mode, when one of the inputs goes low, the outputs follow the input logic. There is no other fixed time de-glitch filter implemented in the device and therefore propagation delay and delay matching are not sacrificed. In other words, there is no built-in dead-time due to the interlock feature. Any noise on the input that could cause the output to shoot-through will be filtered by this feature and the system stays protected. Because the inputs are independent of supply voltage, they can be connected to outputs of either digital controller or analog controller. Small filter at the inputs of the driver further improves system robustness in noise prone applications. The inputs have internal pull down resistors with typical value of 250 kΩ. Thus, when the inputs are floating, the outputs are held low.

GUID-4E0BF221-5C83-4A88-9523-11E4102D6EA6-low.gifFigure 7-1 Interlock or Input Shoot-through Protection