SLVSHL9 November   2024 TPS922051

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 TPS922051D2 24V Input, 2A Output, 4-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 TPS922050D1 48V Input, 1A Output, 12-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

TPS922050 TPS922051 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
TPS922050 TPS922051 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
TPS922050 TPS922051 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
TPS922050 TPS922051 LED Open-Load Protection
Black: LED–, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-8 LED Open-Load Protection
TPS922050 TPS922051 LED+ and LED– Short-Circuit Protection
Black: LED–, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-10 LED+ and LED– Short-Circuit Protection
TPS922050 TPS922051 Sense-Resistor Open Protection
Green: CSN, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-12 Sense-Resistor Open Protection
TPS922050 TPS922051 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
TPS922050 TPS922051 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
TPS922050 TPS922051 Shutdown at DIMAnalog = 2V
Black: DIMAnalog, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-7 Shutdown at DIMAnalog = 2V
TPS922050 TPS922051 LED– Short-to-GND Protection
Black: LED–, Light Blue: SW, Orange: Inductor Current, Green: CSN
Figure 8-9 LED– Short-to-GND Protection
TPS922050 TPS922051 Switching FET Short-Circuit Protection
Black: COMP, Light Blue: SW, Orange: Inductor Current, Green: CSN
Figure 8-11 Switching FET Short-Circuit Protection
TPS922050 TPS922051 Sense-Resistor Short-Circuit Protection
Black: COMP, Light Blue: SW, Orange: Inductor Current, Green: CSN
Figure 8-13 Sense-Resistor Short-Circuit Protection