JAJSME2A december   2022  – august 2023 TLV1851 , TLV1861

PRODMIX  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1.     Pin Configuration: TLV1851 and TLV1861
    2.     Pin Configurations: TLV1852 and TLV1862
    3.     Pin Configurations: TLV1854 and TLV1864
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Thermal Information
    4. 6.4 Recommended Operating Conditions
    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 Diagrams
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Inputs
        1. 7.4.1.1 Operating Common-Mode Ranges
        2. 7.4.1.2 Fail-Safe Inputs
        3. 7.4.1.3 Unused Inputs
      2. 7.4.2 Internal Hysteresis
      3. 7.4.3 Outputs
        1. 7.4.3.1 TLV185x Push-Pull Output
        2. 7.4.3.2 TLV186x Open-Drain Output
      4. 7.4.4 ESD Protection
        1. 7.4.4.1 Inputs
        2. 7.4.4.2 Outputs
      5. 7.4.5 Power-On Reset (POR)
      6. 7.4.6 Reverse Battery Protection
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Basic Comparator Definitions
        1. 8.1.1.1 Operation
        2. 8.1.1.2 Propagation Delay
        3. 8.1.1.3 Overdrive Voltage
      2. 8.1.2 Hysteresis
        1. 8.1.2.1 Inverting Comparator With Hysteresis
        2. 8.1.2.2 Non-Inverting Comparator With Hysteresis
        3. 8.1.2.3 Inverting and Non-Inverting Hysteresis using Open-Drain Output
    2. 8.2 Typical Applications
      1. 8.2.1 Window Comparator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Undervoltage Detection
      3. 8.2.3 Reverse Battery and Overvoltage Protection Scheme
    3. 8.3 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10デバイスおよびドキュメントのサポート
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
  12. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.2.2 Undervoltage Detection

Undervoltage detection is frequently required in low-power, always-on systems to alert the downstream device that a battery or supply voltage has drooped below the nominal voltage level. The TLV185x and TLV186x devices have an over-the-rail capability which allows the comparator to monitor high voltages up to 40 V on the inputs while operating at lower supply voltages such as 3.3 V, as shown in Figure 8-9. The high voltage battery VBAT is divided down to be compared against a reference voltage, which can be set by a shunt regulator such as the TL431. When the voltage on the non-inverting input drops below the reference voltage, then the output of the comparator will toggle and send an alert signal to a MCU.

GUID-20230313-SS0I-0PK3-4L5S-NSZZL05QH87V-low.svgFigure 8-9 Undervoltage Detection