JAJSGA2F September   2018  – June 2021 TPS2663


  1. 特長
  2. アプリケーション
  3. 概要
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and 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  Hot Plug-In and In-Rush Current Control
        1. Thermal Regulation Loop
      2. 9.3.2  PGOOD and PGTH
        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. Overload Protection
          1. Active Current Limiting at 1x IOL, (TPS26630 and TPS26632 Only)
          2. Active Current Limiting with 2x IOL Pulse Current Support, (TPS26631, TPS26633, TPS26635 and TPS26636 Only)
        2. Short Circuit Protection
          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. Programming the Current-Limit Threshold—R(ILIM) Selection
        2. Undervoltage Lockout and Overvoltage Set Point
        3. Output Buffer Capacitor – COUT
        4. PGTH Set Point
        5. Setting Output Voltage Ramp Time—(tdVdT)
          1. Support Component Selections— RPGOOD and C(IN)
        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 Receiving Notification of Documentation Updates
    3. 13.3 サポート・リソース
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information


  • RGE|24
  • PWP|20

Output Power Limiting, PLIM (TPS26632, TPS26633, TPS26635 and TPS26636 Only)

The TPS26630 and TPS26631 devices with a fixed overcurrent limit threshold the maximum output power limit increases linearly with supply input. Electrical industrial process control equipment such as PLC CPU needs to comply with standards like IEC61010-1 and UL1310 for fire safety, which require limited energy and power circuits. Limiting the output power becomes a challenge in such high power applications where the operating supply voltage range is wide. The TPS26632, TPS26633, TPS26635 and TPS26636 devices integrate adjustable output power limiting functionality that simplifies the system design requiring compliance in accordance to this standard.

Connect a resistor from PLIM to GND as shown in Figure 9-16 to set the output power limiting value. If output power limiting is not required then connect PLIM to GND directly. This disables the PLIM functionality.

During an over power load event the TPS26632 limits the output power at the programmed value set by PLIM resistor. This indirectly results in the device operation in current limiting mode with steady state output voltage and current set by the load characteristics and PLIM = VOUT × IOUT. Figure 7-12 shows the output power limit and current limit characteristics of TPS26632 with 100 W power limit setting. The maximum duration for the device in power limiting mode is 162 msec (typical), tCL_PLIM(dly). After this time, the device operates either in auto-retry or latch off mode based on MODE pin configuration in Table 9-1.

During an over power load event the TPS26633, TPS26635 and TPS26636 allows the extra power for a maximum duration of tCB(dly), 25.5 msec (typical). The maximum power during this time is limited to VOUT x 2 x IOL where IOL is the overload current limit set by the R(ILIM) resistor. After the tCB(dly) time, the output power gets limited to the value programmed by the PLIM resistor. Set the power limit using Equation 6.

Equation 6. P(PLIM) = 1 x R(PLIM)

Here P(PLIM) is output power limit in watts, R(PLIM) is the power limit setting resistor in kΩ. Figure 9-17 and Figure 9-18 illustrate output power limiting performance of TPS26632 and TPS26633 devices respectively.

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

GUID-C1CA207D-5CD0-4604-9031-2EBE8AE900B4-low.gifFigure 9-16 TPS26632, TPS26633, TPS26635 and TPS26636 Typical Application Schematic
RPLIM = 100 kΩ RILIM = 3 kΩ
Figure 9-17 100 W Class 2, Output Power Limiting Response of TPS26632
RPLIM = 100 kΩ RILIM = 3 kΩ
Figure 9-18 100 W Class 2, Output Power Limiting Response of TPS26633