SLVSHL8 November   2024 TPS923650 , TPS923651

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adaptive Off-Time Current Mode Control
      2. 7.3.2 Setting LED Current
      3. 7.3.3 Internal Soft Start
      4. 7.3.4 Dimming Mode
        1. 7.3.4.1 PWM Dimming
        2. 7.3.4.2 Analog Dimming
      5. 7.3.5 Fault Protection
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS923651D2 12V Input, 1A Output, 8-piece WLED Driver With Analog Dimming
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Input Capacitor Selection
          3. 8.2.1.2.3 Output Capacitor Selection
          4. 8.2.1.2.4 Sense Resistor Selection
          5. 8.2.1.2.5 Other External Components Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 TPS923650D1 Buck-Boost, 24V Input, 0.5A Output, 4-piece WLED Driver with PWM Dimming
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Inductor Selection
          2. 8.2.2.2.2 Input Capacitor Selection
          3. 8.2.2.2.3 Output Capacitor Selection
          4. 8.2.2.2.4 Sense Resistor Selection
          5. 8.2.2.2.5 Other External Components Selection
        3. 8.2.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
    2. 11.2 Tape and Reel Information

Package Options

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

8.2.2.3 Application Curves

TPS923650 TPS923651 LED Current Ripple at DIMPWM = 99%, 1kHz and FSW = 1MHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-13 LED Current Ripple at DIMPWM = 99%, 1kHz and FSW = 1MHz
TPS923650 TPS923651 LED Current Transient for a DIMPWM Transition from 1% to 99%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-15 LED Current Transient for a DIMPWM Transition from 1% to 99%, 1kHz
TPS923650 TPS923651 Start-Up at DIMPWM = 100%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-17 Start-Up at DIMPWM = 100%, 1kHz
TPS923650 TPS923651 Start-Up at DIMPWM = 10%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-19 Start-Up at DIMPWM = 10%, 1kHz
TPS923650 TPS923651 LED PWM Dimming at DIMPWM = 1%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-14 LED PWM Dimming at DIMPWM = 1%, 1kHz
TPS923650 TPS923651 LED Current Transient for a DIMPWM Transition from 99% to 1%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-16 LED Current Transient for a DIMPWM Transition from 99% to 1%, 1kHz
TPS923650 TPS923651 Shutdown at DIMPWM = 100%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-18 Shutdown at DIMPWM = 100%, 1kHz
TPS923650 TPS923651 Shutdown at DIMPWM = 10%, 1kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-20 Shutdown at DIMPWM = 10%, 1kHz