SLVSI14A March   2026  – September 2026 TPS922152

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Adaptive Off-Time Mode
      2. 6.3.2 Setting LED Current
      3. 6.3.3 VCC UVLO & Clamping
      4. 6.3.4 Dimming Mode
        1. 6.3.4.1 PWM Dimming
        2. 6.3.4.2 Analog Dimming
        3. 6.3.4.3 External Shunt Dimming
      5. 6.3.5 Fault Protection
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 TPS922152 60V Input Bus, 5A Output, 16-piece WLED With Analog and PWM Dimming
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Inductor Selection
          2. 7.2.1.2.2 MOSFET Selection
          3. 7.2.1.2.3 Diode Selection
          4. 7.2.1.2.4 MOSFET Selection
          5. 7.2.1.2.5 Diode Selection
          6. 7.2.1.2.6 Input Capacitor Selection
          7. 7.2.1.2.7 Output Capacitor Selection
          8. 7.2.1.2.8 Sense Resistor Selection
          9. 7.2.1.2.9 Other External Components Selection
        3. 7.2.1.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.5 Fault Protection

The TPS922152 provides comprehensive fault protection and reports status by asserting the open-drain FAULT pin under various fault conditions, including: LED open/short, LED short to PGND, sense resistor open/short, and switching FET open. Upon detecting a fault, the device immediately suspends switching operations and enters a "hiccup" mode, attempting to restart every 1.6 seconds. The device will fully recover once the fault condition is cleared. However, if VCS exceeds the Overvoltage Protection (VCS_OVP) threshold, the device is disabled immediately without entering hiccup mode; it will only resume operation following a UVLO and restart sequence, provided the fault has been removed.
Table 6-2 Protections
TYPE CRITERION BEHAVIOR
LED open load tON > tON_MAX The device stops switching. It hiccups every 1.6s and recovers when fault is removed.
LED+ and LED- short circuit during switching operation (shunt dimming mode is disabled) VCS > VCS_OVP The device stops switching. It recovers after UVLO and restart with fault removed.
LED- short to PGND tON > tON_MAX The device stops switching. It hiccups every 1.6s and recovers when fault is removed.
Sense-resistor open circuit VCS > VCS_OVP The device stops switching. It recovers after UVLO and restart with fault removed.
Sense-resistor short circuit tON > tON_MAX The device stops switching. It hiccups every 1.6s and recovers when fault is removed.
Switching FET open circuit tON > tON_MAX The device stops switching. It hiccups every 1.6s and recovers when fault is removed.

The FAULT pin features an open-drain output, During normal operation, the pin is pulled up to VCC higher than 2.4V via a pull-up resistor, RFAULT. Upon detection of a fault, the internal MOSFET activates, pulling the FAULT pin to ground. When FAULT is not used, please connect it to GND and do not let it floating.

TPS922152 FAULT Open Drain Figure 6-4 FAULT Open Drain