JAJSVO8 November   2024 TPS922051

PRODUCTION DATA  

  1.   1
  2. 特長
  3. アプリケーション
  4. 概要
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. 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. 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. 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. 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

Typical Characteristics

VIN = 24V, LED count = 4, FSW = 400kHz, L = 33µH, unless otherwise specified

TPS922050 TPS922051 Output Current vs. Input VoltageFigure 6-1 Output Current vs. Input Voltage
TPS922050 TPS922051 D1 PWM Duty Cycle vs. CSP-CSN Voltage at 20kHz PWMFigure 6-3 D1 PWM Duty Cycle vs. CSP-CSN Voltage at 20kHz PWM
TPS922050 TPS922051 VIN UVLO Threshold vs. Junction TemperatureFigure 6-5 VIN UVLO Threshold vs. Junction Temperature
TPS922050 TPS922051 VIN Quiescent Current vs. Junction TemperatureFigure 6-7 VIN Quiescent Current vs. Junction Temperature
TPS922050 TPS922051 D1 Efficiency at 24V Input Voltage,
                                2A Output Current, 20kHz PWMFigure 6-9 D1 Efficiency at 24V Input Voltage, 2A Output Current, 20kHz PWM
TPS922050 TPS922051 D2 Efficiency at 24V Input Voltage,
                                2A Output CurrentFigure 6-11 D2 Efficiency at 24V Input Voltage, 2A Output Current
TPS922050 TPS922051 Output Current vs. LED CountFigure 6-2 Output Current vs. LED Count
TPS922050 TPS922051 D2 Analog Voltage vs. CSP-CSN VoltageFigure 6-4 D2 Analog Voltage vs. CSP-CSN Voltage
TPS922050 TPS922051 Internal LDO Output vs. Junction TemperatureFigure 6-6 Internal LDO Output vs. Junction Temperature
TPS922050 TPS922051 Switching FET Rdson vs. Junction TemperatureFigure 6-8 Switching FET Rdson vs. Junction Temperature
TPS922050 TPS922051 D1 Efficiency at 48V Input Voltage,
                                2A Output Current, 20kHz PWMFigure 6-10 D1 Efficiency at 48V Input Voltage, 2A Output Current, 20kHz PWM
TPS922050 TPS922051 D2 Efficiency at 48V Input Voltage,
                                2A Output CurrentFigure 6-12 D2 Efficiency at 48V Input Voltage, 2A Output Current