SLVSHZ1 June   2024 TPS1HTC100-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1. 4.1 Recommended Connections for Unused Pins
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 SNS Timing Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Timing Diagrams
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Accurate Current Sense
      2. 7.3.2 Programmable Current Limit
        1. 7.3.2.1 Capacitive Charging
      3. 7.3.3 Inductive-Load Switching-Off Clamp
      4. 7.3.4 Full Protections and Diagnostics
        1. 7.3.4.1 Short-Circuit and Overload Protection
        2. 7.3.4.2 Open-Load Detection
        3. 7.3.4.3 Thermal Protection Behavior
        4. 7.3.4.4 UVLO Protection
        5. 7.3.4.5 Reverse Polarity Protection
        6. 7.3.4.6 Protection for MCU I/Os
      5. 7.3.5 Diagnostic Enable Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Dynamically Changing Current Limit
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Without a GND Network
        2. 8.4.2.2 With a GND Network
        3. 8.4.2.3 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.4.1 Short-Circuit and Overload Protection

TPS1HTC100-Q1 provides output short-circuit protection to make sure that the device prevents current flow in the event of a low impedance path to GND, removing the risk of damage or significant supply droop. The device is specified to protect against short-circuit events regardless of the state of the ILIM pins and with up to 60V supply at 125°C.

Figure 7-6 shows the behavior of TPS1HTC100-Q1 when a short-circuit occurs and the device is in the on-state and already outputting current. When the internal pass FET is fully enabled, the current clamping settling time is slower so to make sure overshoot is limited, the device implements a fast trip level at a level IOVCR. When this fast trip threshold is hit, the device immediately shuts off for a short period of time before quickly re-enabling and clamping the current to ICL level after a brief transient overshoot to the higher peak current (ICL_ENPS) level. The device then keeps the current clamped at the regulation current limit until the thermal shutdown temperature is hit and the device safely shuts off.

TPS1HTC100-Q1 On-State Short-Circuit BehaviorFigure 7-6 On-State Short-Circuit Behavior

Overload Behavior shows the behavior of the TPS1HTC100-Q1 when there is a small change in impedance that sends the load current above the ICL threshold. The current rises to ICL_LINPK above the regulation level. Then the current limit regulation loop kicks in and the current drops to the ICL value.

TPS1HTC100-Q1 Overload BehaviorFigure 7-7 Overload Behavior

In all of these cases, the internal thermal shutdown is safe to hit repetitively. There is no device risk or lifetime reliability concerns from repeatedly hitting this thermal shutdown level.