JAJSVO8 November   2024 TPS922050 , TPS922051

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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 ドキュメントの更新通知を受け取る方法
    2. 9.2 サポート・リソース
    3. 9.3 Trademarks
    4. 9.4 静電気放電に関する注意事項
    5. 9.5 用語集
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
    2. 11.2 Tape and Reel Information

8.2.2.3 Application Curves

TPS922050 TPS922051 LED Current at DIMPWM = 90%, 20kHz and FSW = 1MHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-15 LED Current at DIMPWM = 90%, 20kHz and FSW = 1MHz
TPS922050 TPS922051 LED PWM Dimming Rising Edge at DIMPWM = 50%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-17 LED PWM Dimming Rising Edge at DIMPWM = 50%, 20kHz
TPS922050 TPS922051 LED Current Transient for a DIMPWM Transition from 1% to 99%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-19 LED Current Transient for a DIMPWM Transition from 1% to 99%, 20kHz
TPS922050 TPS922051 Start-Up at DIMPWM = 100%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-21 Start-Up at DIMPWM = 100%, 20kHz
TPS922050 TPS922051 Start-Up at DIMPWM = 10%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-23 Start-Up at DIMPWM = 10%, 20kHz
TPS922050 TPS922051 LED Current at DIMPWM = 10%, 20kHz and FSW = 1MHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-16 LED Current at DIMPWM = 10%, 20kHz and FSW = 1MHz
TPS922050 TPS922051 LED PWM Dimming Falling Edge at DIMPWM = 50%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-18 LED PWM Dimming Falling Edge at DIMPWM = 50%, 20kHz
TPS922050 TPS922051 LED Current Transient for a DIMPWM Transition from 99% to 1%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-20 LED Current Transient for a DIMPWM Transition from 99% to 1%, 20kHz
TPS922050 TPS922051 Shutdown at DIMPWM = 100%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-22 Shutdown at DIMPWM = 100%, 20kHz
TPS922050 TPS922051 Shutdown at DIMPWM = 10%, 20kHz
Black: DIMPWM, Light Blue: SW, Orange: Inductor Current, Deep Blue: LED Current
Figure 8-24 Shutdown at DIMPWM = 10%, 20kHz