SLVSGF4B june   2022  – may 2023 TPS1641

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Enable and Shutdown Input (EN/SHDN)
      2. 8.3.2  Overvoltage Protection (OVP)
      3. 8.3.3  Output Slew Rate and Inrush Current Control (dVdt)
      4. 8.3.4  Active Current Limiting (ILIM) With the TPS16412, TPS16413, TPS16416, and TPS16417
      5. 8.3.5  Active Power Limiting (PLIM) With the TPS16410, TPS16411, TPS16414, and TPS16415
        1. 8.3.5.1 Internal Current Limit for the TPS16410 and TPS16411
      6. 8.3.6  Overcurrent Protection (IOCP) and Blanking Time (IDLY or PDLY) for Transient Loads
      7. 8.3.7  Fast-Trip and Short-Circuit Protection
      8. 8.3.8  Analog Load Current Monitor (IMON) on the IOCP Pin
      9. 8.3.9  IN to OUT Short Detection (TPS16410, TPS16411, TPS16412, and TPS16413)
      10. 8.3.10 Thermal Shutdown and Overtemperature Protection
      11. 8.3.11 Fault Response and Indication (FLT)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: 15-W Power Limiting for Low Power Circuits (LPCs)
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Setting Overvoltage Setpoints
        2. 9.2.2.2 Setting the Output Overcurrent Setpoint (IOCP)
        3. 9.2.2.3 Setting the Output Power Limit
        4. 9.2.2.4 Monitoring the Output Current
        5. 9.2.2.5 Limiting the Inrush Current and Setting the Output Slew Rate
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Accurate Power or Current Limiting at the Output of DC/DC or Flyback Converter
    4. 9.4 Best Design Practices
    5. 9.5 Power Supply Recommendations
      1. 9.5.1 Transient Protection
    6. 9.6 Layout
      1. 9.6.1 Layout Guidelines
      2. 9.6.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.2 Overvoltage Protection (OVP)

The TPS1641x implements overvoltage protection to protect the load from input overvoltage conditions. A resistor divider can be connected from the IN pin of device to configure the overvoltage protection setpoint. The device turns off the internal FET and asserts the FLT pin as the voltage at OVP pin goes above VOVPR, and as the OVP pin voltage falls below VOVPF, the internal FET is turned ON and FLT pin is de-asserted. See the Section 7.5 table for VOVPF and VOVPR­ and Section 7.6 for tOVP_entry_dly and tOVP_exit_dly timings for overvoltage protection input. Figure 8-3 illustrates the OVP input in TPS1641x devices. Figure 8-4 shows the overvoltage response.

GUID-20211220-SS0I-NJPB-9X8W-RW8XLMZ9KP99-low.svg Figure 8-3 OVP Input in TPS1641x
GUID-20220603-SS0I-QJBC-GFN8-CDLM3FHWDPQ3-low.png Figure 8-4 Overvoltage Protection Response for IN Voltage 12 V to 40 V

Vcc and FLT pins of the device are rated up to 60 V, and the FLT pin can be used to drive an external PFET transistor and provide protection from 60-V overvoltage at input as shown in Figure 8-5.

GUID-20211220-SS0I-HLRP-1QFB-CP2SFHNQX1LJ-low.svg Figure 8-5 Overvoltage (up to 60 V) Protection with External PFET

To disable the overvoltage input, connect OVP to GND. If the OVP pin is left open, the device turns off the internal FET.

GUID-20220603-SS0I-0BWZ-FQLT-SSHSVZJJRV0D-low.pngFigure 8-6 Overvoltage Response with External PFET for IN Voltage from 12 V to 60 V
GUID-20220607-SS0I-TTMN-14BQ-ZDJMKL4LNZBS-low.pngFigure 8-7 Hot Plugin with External PFET for 60-V Input