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
9.3.7.1.2 Active Current Limiting with 2x IOL Pulse Current Support, (TPS26631, TPS26633, TPS26635 and TPS26636 Only)

TPS26631,TPS26633,TPS26635 and TPS26636 after the start-up and with PGOOD high, if the load current exceeds IOL, then an internal fixed tCB(dly), 25.5 msec (typical) timer starts. During this time the device will pass through the over current demanded by the load not more than 2 x IOL above which the device will regulate at 2 x IOL. After tCB(dly) time, the device regulates the current at IOL. The power dissipation across the device during this operation will be (VIN–VOUT) x IOL and this could heat up the device and eventually enter into thermal shutdown. The maximum duration for the internal FET in current regulation is tCL_PLIM(dly). The subsequent operation will be based on the MODE setting (either auto-retry or latch OFF) in Table 9-1.

The 2 x I(OL) pulse current support is activated only after PGOOD goes high. If PGOOD is in low state such as during start-up operation or during auto-retry cycles, the 2 x I(OL) pulse current support is not activated and the device limits the current at I(OL) level.

Figure 9-12 and Figure 9-13 illustrate overload current limiting performance.

GUID-E82B347B-B2A4-4B29-99A2-767F1CBE2A2B-low.gif
VIN_SYS = 24 V MODE connected to GND (Auto-Retry) RILIM = 9 kΩ
Figure 9-12 Overload Performance with TPS26631, TPS26633, TPS26635 and TPS26636 during Load Step from 19 Ω to 9 Ω
GUID-08E53CD5-38CE-4E96-A22C-F18F627DA35D-low.gif
VIN_SYS = 24 V MODE connected to GND (Auto-Retry) RILIM = 9 kΩ
Figure 9-13 Response during Coming Out of Overload Fault

The TPS2663x devices feature ILIM pin short and open fault detection and protection. The internal FET is turned OFF when ILIM pin is detected short or open to GND and it remains OFF till the ILIM pin fault is removed.

Refer to Figure 8-2 for more information on tCB(dly) and tCL_PLIM(dly) parameter measurement information.
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