SLVSGH1A April   2023  – September 2023 TPS923652 , TPS923653 , TPS923654 , TPS923655

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  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
    6. 7.6 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Adaptive Off-Time Current Mode Control
        1. 8.3.1.1 Switching Frequency Settings
        2. 8.3.1.2 Spread Spectrum
      2. 8.3.2 Setting LED Current
      3. 8.3.3 Undervoltage Lockout
      4. 8.3.4 Internal Soft Start
      5. 8.3.5 Dimming Mode
        1. 8.3.5.1 PWM Dimming
        2. 8.3.5.2 Analog Dimming
        3. 8.3.5.3 Hybrid Dimming
        4. 8.3.5.4 Flexible Dimming
      6. 8.3.6 CC/CV Charging Mode
      7. 8.3.7 Fault Protection
      8. 8.3.8 Thermal Foldback
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 TPS923654 Boost, 12-V Input, 1-A Output, 12-piece WLED Driver With Analog Dimming
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Input Capacitor Selection
          3. 9.2.1.2.3 Output Capacitor Selection
          4. 9.2.1.2.4 Sense Resistor Selection
          5. 9.2.1.2.5 Other External Components Selection
        3. 9.2.1.3 Application Curves
      2. 9.2.2 TPS923654 Buck-Boost, 24-V Input, 2-A Output, 4-piece WLED Driver with PWM Dimming
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Input Capacitor Selection
          3. 9.2.2.2.3 Output Capacitor Selection
          4. 9.2.2.2.4 Sense Resistor Selection
          5. 9.2.2.2.5 Other External Components Selection
        3. 9.2.2.3 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. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.3 Undervoltage Lockout

The TPS92365x family implements an internal undervoltage-lockout (UVLO) circuitry connecting to the VCC pin. The UVLO is triggered and then the device is disabled when the VCC pin voltage falls below the internal UVLO threshold voltage, VVIN_UVLO typically 3.0 V, with a typical 0.2-V hysteresis. The VCC pin is the output of an internal regulator of which the input is supplied by the VIN pin. Therefore, if VIN pin voltage falls close to above the VVIN_UVLO (around 500 mV above), the UVLO will be triggered.