SLVSEW6F August   2021  – March 2024 TPS7H2211-SEP , TPS7H2211-SP

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Related Products
  7. 6 Pin Configuration and Functions
  8. 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: All Devices
    6. 7.6  Electrical Characteristics: CFP and KGD Options
    7. 7.7  Electrical Characteristics: HTSSOP Option
    8. 7.8  Switching Characteristics: All Devices
    9. 7.9  Quality Conformance Inspection
    10. 7.10 Typical Characteristics
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Enable and Overvoltage Protection
      2. 9.3.2 Current Limit
      3. 9.3.3 Soft Start (Adjustable Rise Time)
      4. 9.3.4 Parallel Operation
      5. 9.3.5 Reverse Current Protection
      6. 9.3.6 Forward Leakage Current
    4. 9.4 Device Functional Modes
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Application 1: Cold Sparing
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Capacitance
          2. 10.2.1.2.2 Enable Control
          3. 10.2.1.2.3 Overvoltage Protection
          4. 10.2.1.2.4 Soft Start Time
          5. 10.2.1.2.5 Summary
        3. 10.2.1.3 Application Curve
      2. 10.2.2 Application 2: Protection
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Capacitance
          2. 10.2.2.2.2 Enable Control
          3. 10.2.2.2.3 Overvoltage Protection
          4. 10.2.2.2.4 Soft Start Time
          5. 10.2.2.2.5 Summary
        3. 10.2.2.3 Application Curve
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DAP|32
Thermal pad, mechanical data (Package|Pins)
Orderable Information
10.2.1.2.3 Overvoltage Protection

The overvoltage protection is set by configuring the RBOT_OVP and RTOP_OVP resistors. The overvoltage protection feature turns off the switch if the input voltage exceeds a predetermined value as described in Section 9.3.1. For this design, the goal is to have the overvoltage protection activate at a nominal voltage of 13.5 V. First set RTOP_OVP = 100 kΩ with a 0.1% tolerance resistor, then use Equation 10 to calculate the nominal value of RBOT_OVP. A nominal 9.31-kΩ 0.1% tolerance resistor best satisfies the equation.

Equation 10. GUID-E03922BF-5604-4082-89DD-9FFE6F6F5F5E-low.gif

where

  • VOVPR(TYP) = 1.15 V
  • RTOP_OVP = 100 kΩ
  • VINOVP_RISE = 13.5 V

In order to ensure the selected RBOT_OVP value is acceptable for both the minimum and maximum OVP rising threshold, use Equation 11. VINOVP_RISE(MIN) is selected as the highest possible value that VIN will reach during nominal operation (to prevent false OVP trips). VINOVP_RISE(MAX) may be selected by the user as long as it is within the VIN of the Recommended Operating Conditions. These selections result in an allowable value of RBOT_OVP between 9.214 kΩ and 9.650 kΩ. The selected 9.31-kΩ 0.1% tolerance resistor satisfies these constraints, even when taking into account its tolerance.

Equation 11. GUID-472C2F99-1B6C-45AF-9D96-D4C168D9B876-low.gif

where

  • VOVPR(MAX) = 1.18 V
  • RTOP_OVP = 100 kΩ
  • Rtolerance = 0.01% = 0.001
  • VINOVP_RISE(MAX) = 14 V
  • VOVPR(MIN) = 1.11 V
  • VINOVP_RISE(MIN) = VIN × (1 + tolerance) = 12.6 V

Since the OVP pin has hysteresis, the OVP falling threshold will be different than the rising threshold. Therefore, in order to ensure the selected RBOT_OVP value is acceptable for the OVP falling threshold, use Equation 12. VINOVP_FALL(MIN) and VINOVP_FALL(MAX) values may be selected using the same method as for VINOVP_RISE(MIN) and VINOVP_RISE(MAX). These selections results in an allowable RBOT_OVP value between of 9.129 kΩ and 9.460 kΩ. The selected 9.31-kΩ 0.1% tolerance resistor also satisfies these constraints, even when taking into account its tolerance.

Equation 12. GUID-24F619C3-9AF8-46D9-8726-00F3CC3BEEB4-low.gif

where

  • VOVPF(MAX) = 1.17 V
  • RTOP_OVP = 100 kΩ
  • Rtolerance = 0.001
  • VINOVP_FALL(MAX) = 14 V
  • VOVPF(MIN) = 1.09 V
  • VINOVP_FALL(MIN) = VIN × (1 + tolerance) = 12.6 V

To summarize, using Equation 3 and Equation 4 with RTOP_OVP = 100 kΩ and RBOT_OVP = 9.31 kΩ, the eFuse will nominally go into overvoltage protection mode at 13.50 V and exit at 13.38 V. Taking into account the minimum and maximum OVP pin threshold and resistor tolerances, the switch will enter over voltage protection mode between 13.01 V and 13.88 V and exit between 12.77 V and 13.76 V.

CAUTION:

The eFuse input voltage must remain within the recommended operating conditions (which contain a maximum VIN of 14 V). If OVP is configured above 14 V, then the OVP mode should only be used as a last resort feature. The eFuse is not intended to be above 14 V.