SLVSHL8 November   2024 TPS923650

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

8.2.1.3 Application Curves

TPS923650 TPS923651 LED Current Ripple at DIMAnalog = 2V and FSW = 400kHz
Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current Ripple (AC)
Figure 8-2 LED Current Ripple at DIMAnalog = 2V and FSW = 400kHz
TPS923650 TPS923651 LED Current Transient for a DIMAnalog Transition from 0.2V to 2V
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-4 LED Current Transient for a DIMAnalog Transition from 0.2V to 2V
TPS923650 TPS923651 Start-Up at DIMAnalog = 2V
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-6 Start-Up at DIMAnalog = 2V
TPS923650 TPS923651 LED Dimming Rising and Falling Edges at DIMAnalog = 2V, 20kHz
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-8 LED Dimming Rising and Falling Edges at DIMAnalog = 2V, 20kHz
TPS923650 TPS923651 Sense-Resistor Open Protection
Light Blue: SW, Green: CSN, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-10 Sense-Resistor Open Protection
TPS923650 TPS923651 LED Current Ripple at DIMAnalog = 0.2V and FSW = 400kHz
Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current Ripple (AC)
Figure 8-3 LED Current Ripple at DIMAnalog = 0.2V and FSW = 400kHz
TPS923650 TPS923651 LED Current Transient for a DIMAnalog Transition from 2V to 0.2V
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-5 LED Current Transient for a DIMAnalog Transition from 2V to 0.2V
TPS923650 TPS923651 Shutdown at DIMAnalog = 2V
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-7 Shutdown at DIMAnalog = 2V
TPS923650 TPS923651 LED Open-Load Protection
Light Blue: SW, Green: CSN, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-9 LED Open-Load Protection
TPS923650 TPS923651 Sense-Resistor Short-Circuit Protection
Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current, Green: CSN
Figure 8-11 Sense-Resistor Short-Circuit Protection