ZHCSI22E October   2017  – August 2019 TPS2662

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
    1.     Device Images
      1.      简化原理图
      2.      –60V 电源时的反向输入极性保护
  4. 修订历史记录
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions
  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 Timing Requirements
    7. 7.7 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Undervoltage Lockout (UVLO)
      2. 9.3.2 Overvoltage Protection (OVP)
      3. 9.3.3 Hot Plug-In and In-Rush Current Control
      4. 9.3.4 Reverse Polarity Protection
        1. 9.3.4.1 Input Side Reverse Polarity Protection
        2. 9.3.4.2 Output Side Reverse Polarity Protection
      5. 9.3.5 Overload and Short Circuit Protection
        1. 9.3.5.1 Overload Protection
        2. 9.3.5.2 Short Circuit Protection
          1. 9.3.5.2.1 Start-Up With Short-Circuit On Output
      6. 9.3.6 Reverse Current Protection
      7. 9.3.7 FAULT Response
      8. 9.3.8 IN, OUT, RTN, and GND Pins
      9. 9.3.9 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 Low Current Shutdown Control (SHDN)
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Step by Step Design Procedure
        2. 10.2.2.2 Programming the Current-Limit Threshold R(ILIM) Selection
        3. 10.2.2.3 Undervoltage Lockout and Overvoltage Set Point
        4. 10.2.2.4 Setting Output Voltage Ramp Time—(tdVdT)
          1. 10.2.2.4.1 Case 1: Start-Up Without Load—Only Output Capacitance C(OUT) Draws Current During Start-Up
          2. 10.2.2.4.2 Case 2: Start-Up With Load —Output Capacitance C(OUT) and Load Draws Current During Start-Up
          3. 10.2.2.4.3 Support Component Selections - RFLT and C(IN)
      3. 10.2.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 Field Supply Protection in PLC, DCS I/O Modules
      2. 10.3.2 Simple 24-V Power Supply Path Protection
      3. 10.3.3 Power Stealing in Smart Thermostat
    4. 10.4 Do's and Don'ts
  11. 11Power Supply Recommendations
    1. 11.1 Transient Protection
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13器件和文档支持
    1. 13.1 接收文档更新通知
    2. 13.2 社区资源
    3. 13.3 商标
    4. 13.4 静电放电警告
    5. 13.5 Glossary
  14. 14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

Case 1: Start-Up Without Load—Only Output Capacitance C(OUT) Draws Current During Start-Up

During start-up, as the output capacitor charges, the voltage difference across the internal FET decreases, and the power dissipation decreases. Typical ramp-up of the output voltage, inrush current and instantaneous power dissipated in the device during start-up are shown in Figure 48. The average power dissipated in the device during start-up is equal to the area of triangular plot (red curve in Figure 49) averaged over tdVdT.

TPS2662 PDinrush1.gif
VIN = 24 V CdVdT = 10 nF COUT = 22 µF
Figure 48. Start-Up Without Load
TPS2662 D029_SLVSDT4.gif
VIN = 24 V CdVdT = 10 nF COUT = 22 µF
Figure 49. PD(INRUSH) Due to Inrush Current

The inrush current is determined as shown in Equation 8.

Equation 8. TPS2662 Equation_7_App2.gif

Average power dissipated during start-up is given by Equation 9.

Equation 9. TPS2662 Equation_8_App.gif

Equation 9 assumes that the load does not draw any current until the output voltage reaches its final value.