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  • TPS922050/1 65V 1A/2A Buck LED Driver with PWM/Analog Dimming

    • SLVSHL9 November   2024 TPS922050 , TPS922051

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  • TPS922050/1 65V 1A/2A Buck LED Driver with PWM/Analog Dimming
  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
  13. IMPORTANT NOTICE
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Data Sheet

TPS922050/1 65V 1A/2A Buck LED Driver with PWM/Analog Dimming

1 Features

  • 4.5V to 65V wide input range
  • LED common anode connection
  • Integrated 300mΩ MOSFET:
    • Typical current limit (1.6A / 3.2A)
    • Switching frequency (400kHz / 1MHz)
  • Advanced dimming options:
    • Analog dimming (200:1)
    • Fast PWM dimming (50ns pulse width)
  • Full protection features:
    • LED open and short protection
    • Switching FET open and short protection
    • External component failure protection
    • Cycle-by-cycle current limit
    • Thermal shutdown
  • Package: WSON-8, HVSSOP-8, SOT583

2 Applications

  • Constant illumination:
    • Indoor and outdoor lighting
    • Appliance lighting
    • Cold/warm WLED lighting
    • Emergency and signage lighting
    • Security floodlight
    • LED bulb and lamp
    • LCD backlight
  • Instant illumination:
    • Machine vision and camera flash
    • Fire alarm and strobe
TPS922050 TPS922051 Simplified Schematic Simplified Schematic

 
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