SNVS549C June   2009  – February 2016 LM3554

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  6. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Start-Up
      2. 6.3.2  Overvoltage Protection
      3. 6.3.3  Current Limit
      4. 6.3.4  Flash Termination (Strobe-Initiated Flash)
      5. 6.3.5  Flash Termination (I2C-Initiated Flash)
      6. 6.3.6  Flash Timeout
      7. 6.3.7  Torch Mode
      8. 6.3.8  TX1/Torch
      9. 6.3.9  ENVM/TX2/GPIO2
        1. 6.3.9.1 ENVM/TX2/GPIO2/INT as an Interrupt Output
      10. 6.3.10 Indicator LED/Thermistor (LEDI/NTC)
        1. 6.3.10.1 LED Indicator Mode (LEDI)
        2. 6.3.10.2 Thermal Comparator Mode (NTC)
      11. 6.3.11 Alternative External Torch (AET Mode)
      12. 6.3.12 Input Voltage Monitor
      13. 6.3.13 LM3554 Timing Diagrams
      14. 6.3.14 Flags Register and Fault Indicators
      15. 6.3.15 Thermal Shutdown
      16. 6.3.16 LED Fault
      17. 6.3.17 Flash Timeout
      18. 6.3.18 LED Thermal Fault
      19. 6.3.19 Input Voltage Monitor Fault
      20. 6.3.20 TX1 And TX2 Interrupt Flags
      21. 6.3.21 Light Load Disable
    4. 6.4 Device Functional Modes
      1. 6.4.1 Flash Mode
      2. 6.4.2 Pass Mode
      3. 6.4.3 Voltage-Output Mode
    5. 6.5 Programming
      1. 6.5.1 I2C-Compatible Interface
        1. 6.5.1.1 Start and Stop Conditions
        2. 6.5.1.2 I2C-Compatible Chip Address
        3. 6.5.1.3 Transferring Data
    6. 6.6 Register Maps
      1. 6.6.1 Register Descriptions
        1. 6.6.1.1 Torch Brightness Register
        2. 6.6.1.2 Flash Brightness Register
        3. 6.6.1.3 Flash Duration Register
        4. 6.6.1.4 Flags Register
        5. 6.6.1.5 Configuration Register 1
        6. 6.6.1.6 Configuration Register 2
        7. 6.6.1.7 GPIO Register
        8. 6.6.1.8 VIN Monitor Register
  7. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Output Capacitor Selection
        2. 7.2.2.2 Input Capacitor Selection
        3. 7.2.2.3 Inductor Selection
        4. 7.2.2.4 NTC Thermistor Selection
        5. 7.2.2.5 NTC Thermistor Placement
        6. 7.2.2.6 Maximum Load Current (Voltage Mode)
        7. 7.2.2.7 Maximum Output Power
          1. 7.2.2.7.1 Voltage-Output Mode
          2. 7.2.2.7.2 LED Boost Mode
          3. 7.2.2.7.3 LED Pass Mode
      3. 7.2.3 Application Curves
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Community Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation.