JAJSCF6G July   2016  – December  2019 TPS2660

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
    1.     概略回路図
  3. 3 概要
    1.     -60V電源における入力逆極性保護
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Undervoltage Lockout (UVLO)
      2. 10.3.2 Overvoltage Protection (OVP)
      3. 10.3.3 Reverse Input Supply Protection
      4. 10.3.4 Hot Plug-In and In-Rush Current Control
      5. 10.3.5 Overload and Short Circuit Protection
        1. 10.3.5.1 Overload Protection
          1. 10.3.5.1.1 Active Current Limiting
          2. 10.3.5.1.2 Electronic Circuit Breaker with Overload Timeout, MODE = OPEN
        2. 10.3.5.2 Short Circuit Protection
          1. 10.3.5.2.1 Start-Up With Short-Circuit On Output
        3. 10.3.5.3 FAULT Response
          1. 10.3.5.3.1 Look Ahead Overload Current Fault Indicator
        4. 10.3.5.4 Current Monitoring
        5. 10.3.5.5 IN, OUT, RTN, and GND Pins
        6. 10.3.5.6 Thermal Shutdown
        7. 10.3.5.7 Low Current Shutdown Control (SHDN)
    4. 10.4 Device Functional Modes
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Step by Step Design Procedure
        2. 11.2.2.2 Programming the Current-Limit Threshold—R(ILIM) Selection
        3. 11.2.2.3 Undervoltage Lockout and Overvoltage Set Point
        4. 11.2.2.4 Programming Current Monitoring Resistor—RIMON
        5. 11.2.2.5 Setting Output Voltage Ramp Time—(tdVdT)
          1. 11.2.2.5.1 Case 1: Start-Up Without Load—Only Output Capacitance C(OUT) Draws Current During Start-Up
          2. 11.2.2.5.2 Case 2: Start-Up With Load—Output Capacitance C(OUT) and Load Draws Current During Start-Up
          3. 11.2.2.5.3 Support Component Selections—RFLTb and C(IN)
      3. 11.2.3 Application Curves
    3. 11.3 System Examples
      1. 11.3.1 Acive ORing Operation
      2. 11.3.2 Field Supply Protection in PLC, DCS I/O Modules
      3. 11.3.3 Simple 24-V Power Supply Path Protection
    4. 11.4 Do's and Don'ts
  12. 12Power Supply Recommendations
    1. 12.1 Transient Protection
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14デバイスおよびドキュメントのサポート
    1. 14.1 デバイス・サポート
    2. 14.2 ドキュメントのサポート
      1. 14.2.1 関連資料
    3. 14.3 ドキュメントの更新通知を受け取る方法
    4. 14.4 コミュニティ・リソース
    5. 14.5 商標
    6. 14.6 静電気放電に関する注意事項
    7. 14.7 Glossary
  15. 15メカニカル、パッケージ、および注文情報

10.3.1 Undervoltage Lockout (UVLO)

Undervoltage comparator input. When the voltage at UVLO pin falls below V(UVLOF) during input power fail or input undervoltage fault, the internal FET quickly turns off and FLT is asserted. The UVLO comparator has a hysteresis of 90 mV. To set the input UVLO threshold, connect a resistor divider network from IN supply to UVLO terminal to RTN as shown in Figure 34.

TPS2660 EN_UVLO_OVP_Diagram.gifFigure 34. UVLO and OVP Thresholds Set by R1, R2 and R3

The TPS2660x also features a factory set 15-V input supply undervoltage lockout V(IN_UVLO) threshold with 1 V hysteresis. This feature can be enabled by connecting the UVLO terminal directly to the RTN terminal. If the Under-Voltage Lock-Out function is not needed, the UVLO terminal must be connected to the IN terminal. UVLO terminal must not be left floating.

The device also implements an internal power ON reset (POR) function on the IN terminal. The device disables the internal circuitry when the IN terminal voltage falls below internal POR threshold V(PORF). The internal POR threshold has a hysteresis of 275 mV.