ZHCSIU6F September   2018  – June 2021 TPS2663

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Hot Plug-In and In-Rush Current Control
        1. 9.3.1.1 Thermal Regulation Loop
      2. 9.3.2  PGOOD and PGTH
        1. 9.3.2.1 PGTH as VOUT Sensing Input
      3. 9.3.3  Undervoltage Lockout (UVLO)
      4. 9.3.4  Overvoltage Protection (OVP)
      5. 9.3.5  Input Reverse Polarity Protection (B_GATE, DRV)
      6. 9.3.6  Reverse Current Protection
      7. 9.3.7  Overload and Short Circuit Protection
        1. 9.3.7.1 Overload Protection
          1. 9.3.7.1.1 Active Current Limiting at 1x IOL, (TPS26630 and TPS26632 Only)
          2. 9.3.7.1.2 Active Current Limiting with 2x IOL Pulse Current Support, (TPS26631, TPS26633, TPS26635 and TPS26636 Only)
        2. 9.3.7.2 Short Circuit Protection
          1. 9.3.7.2.1 Start-Up With Short-Circuit On Output
      8. 9.3.8  Output Power Limiting, PLIM (TPS26632, TPS26633, TPS26635 and TPS26636 Only)
      9. 9.3.9  Current Monitoring Output (IMON)
      10. 9.3.10 FAULT Response ( FLT)
      11. 9.3.11 IN_SYS, IN, OUT and GND Pins
      12. 9.3.12 Thermal Shutdown
      13. 9.3.13 Low Current Shutdown Control (SHDN)
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application: Power Path Protection in a PLC System
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Programming the Current-Limit Threshold—R(ILIM) Selection
        2. 10.2.2.2 Undervoltage Lockout and Overvoltage Set Point
        3. 10.2.2.3 Output Buffer Capacitor – COUT
        4. 10.2.2.4 PGTH Set Point
        5. 10.2.2.5 Setting Output Voltage Ramp Time—(tdVdT)
          1. 10.2.2.5.1 Support Component Selections— RPGOOD and C(IN)
        6. 10.2.2.6 Selecting Q1, Q2 and TVS Clamp for Surge Protection
      3. 10.2.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 Simple 24-V Power Supply Path Protection
      2. 10.3.2 Priority Power MUX Operation
      3. 10.3.3 Input Protection for a Compact 24-V Auxiliary Power Supply for Servo Drives
    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. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 接收文档更新通知
    3. 13.3 支持资源
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 术语表
  14. 14Mechanical, Packaging, and Orderable Information

9.3.5 Input Reverse Polarity Protection (B_GATE, DRV)

The TPS2663x devices support the reverse input polarity protection feature. Connect an N-channel power FET (Q1) with the source to IN_SYS, drain to IN and GATE to B-GATE as shown in Figure 9-5. This forms a back to back FET topology in power path that is required to protect the load from input reverse polarity faults. Connect an external signal FET (Q2) across BGATE, DRV and IN_SYS. Q2 acts as a pull down gate switch for Q1. In the applications where reverse polarity protection and reverse current blocking is not required then connect IN_SYS and IN together. Leave BGATE and DRV open as shown in Figure 9-6.
Figure 8-7 illustrates the reverse input polarity protection functionality.

The TPS2663x devices support a maximum differential voltage across V(IN_SYS) – V(OUT) upto –85 V. This high voltage transients generally appear during the IEC61000-4-5 surge testing at the V(IN_SYS). This voltage stress appears across the external N-channel FET. The TPS2663x provides a gate drive (B_GATE) of 10.2 V (typical). The fast pull down gate switch Q2 pulls down the GATE of the Q1 during reverse current and reverse polarity fault events. Q2 should be at least 15-V, VDS rated FET with a maximum VGS rating of 20-V, Ciss ≤ 50 pF and VGTH(min) ≤ 3 V.

GUID-6AFB1755-F386-42A0-AA51-5F6D2A86945F-low.gif
A.
Figure 9-5 Configuration for Input Reverse Polarity Protection and Reverse Current Blocking
GUID-D417C837-9BD1-4573-875B-BDC7FB7666DD-low.gif
A.
Figure 9-6 Configuration for Applications Without Input Reverse Polarity Protection and Reverse Current Blocking Requirement
GUID-0D376896-3CD8-44ED-B45D-7227FC09F408-low.gif
Figure 9-7 Input Reverse Polarity Response at –60-V Input
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