ZHCSTJ7A October   2023  – December 2023 TPS3762

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Specifications
    2. 6.2 Absolute Maximum Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Requirements
    7. 6.7 Timing Requirements
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristic
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Voltage (VDD)
        1. 7.3.1.1 Undervoltage Lockout (VPOR < VDD < UVLO)
        2. 7.3.1.2 Power-On Reset (VDD < VPOR )
      2. 7.3.2 SENSE
        1. 7.3.2.1 Reverse Polarity Protection
        2. 7.3.2.2 SENSE Hysteresis
      3. 7.3.3 Output Logic Configurations
        1. 7.3.3.1 Open-Drain
        2. 7.3.3.2 Active-Low (RESET)
        3. 7.3.3.3 Latching
      4. 7.3.4 User-Programmable Reset Time Delay
        1. 7.3.4.1 Reset Time Delay Configuration
      5. 7.3.5 User-Programmable Sense Delay
        1. 7.3.5.1 Sense Time Delay Configuration
      6. 7.3.6 Built-In Self-Test
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Adjustable Voltage Thresholds
    3. 8.3 Typical Application
      1. 8.3.1 Design 1: SELV Power Supply Monitoring
        1. 8.3.1.1 Design Requirements
        2. 8.3.1.2 Detailed Design Procedure
          1. 8.3.1.2.1 Setting Voltage Threshold
          2. 8.3.1.2.2 Meeting the Sense and Reset Delay
          3. 8.3.1.2.3 Setting Supply Voltage
          4. 8.3.1.2.4 Initiating Built-In Self-Test and Clearing Latch
        3. 8.3.1.3 Application Curves
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 Power Dissipation and Device Operation
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Nomenclature
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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7.3.2.2 SENSE Hysteresis

TPS3762 device offers built-in hysteresis around the UV and OV thresholds to avoid erroneous RESET deassert. The hysteresis is opposite to the threshold voltage; for overvoltage options the hysteresis is subtracted from the positive threshold (VITP), for undervoltage options hysteresis is added to the negative threshold (VITN).

GUID-20231205-SS0I-58WF-CMZC-WQRDTCJVFLFD-low.svgFigure 7-5 Hysteresis (Undervoltage & Overvoltage Active-Low)
Table 7-1 Common Adjustable Hysteresis Lookup Table
TARGETDEVICE ACTUAL HYSTERESIS OPTION
ADJUSTABLE THRESHOLDTOPOLOGYRELEASE VOLTAGE (V)
800 mVOvervoltage

784 mV

-2%

800 mVOvervoltage

760 mV

-5%
800 mVOvervoltage

720 mV

-10%
800 mVUndervoltage

816 mV

2%

800 mVUndervoltage

840 mV

5%
800 mVUndervoltage

880 mV

10%

Table 7-1 shows a sample of hysteresis for the 800 mV adjustable variant for the TPS3762.

Knowing the amount of hysteresis voltage, the release voltage for the undervoltage (UV) channel is
(VITN + VHYS) and for the overvoltage (OV) channel is (VITP - VHYS).

Undervoltage (UV) Channel

VITN = 800 mV

Voltage Hysteresis (VHYS) = 2% = 16 mV

Hysteresis Accuracy = +1.5% to +2.5% = 16.24 mV to 16.4 mV

Release Voltage = VITN + VHYS = 816.24 mV to 816.4 mV

Overvoltage (OV) Channel

VITP = 800 mV

Voltage Hysteresis (VHYS) = 2% = 16 mV

Hysteresis Accuracy = +1.5% to +2.5% = 16.24 mV to 16.4 mV

Release Voltage = VITP - VHYS = 783.6 mV to 783.76 mV