SLUSFM0 May   2025 TPS4816-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Charge Pump and Gate Driver output (VS, GATE, BST, SRC)
      2. 8.3.2 Capacitive Load Driving
        1. 8.3.2.1 Using Bypass FET (G drive) for Load Capacitor Charging
        2. 8.3.2.2 Using Main FET's (GATE drive) Gate Slew Rate Control
      3. 8.3.3 Overcurrent and Short-Circuit Protection
        1. 8.3.3.1 I2t Based Overcurrent Protection
          1. 8.3.3.1.1 I2t based Overcurrent Protection with Auto-Retry
          2. 8.3.3.1.2 I2t based Overcurrent Protection with Latch-Off
        2. 8.3.3.2 Short-Circuit Protection
      4. 8.3.4 Analog Current Monitor Output (IMON)
      5. 8.3.5 NTC based Temperature Sensing (TMP) and Analog Monitor Output (ITMPO)
      6. 8.3.6 Fault Indication and Diagnosis (FLT)
      7. 8.3.7 Reverse Polarity Protection
      8. 8.3.8 Undervoltage (UVLO) and Overvoltage (OV) Protection
      9. 8.3.9 TPS48161-Q1 as a Simple Gate Driver
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Down
      2. 8.4.2 Shutdown Mode
      3. 8.4.3 Active Mode (AM)
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: Driving Capacitve Load
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 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
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.3.6 Fault Indication and Diagnosis (FLT)

The TPS4816-Q1 feature integrated charge pump UVLO feature. The voltage across BST-SRC is internally monitored. If the voltage is < V(BST_UVLO) then FLT is asserted low. Both the GATE and G gate drives also get disabled in this condition turning OFF main and bypass FETs. FLT gets de-asserted and gate drivers get enabled when BST to SRC voltage rises above V(BST_UVLO).

FLT assets low in TPS4816-Q1 when short-circuit or I2t based overcurrent or charge pump UVLO or input overvoltage is detected.