SNVS624B June   2011  – June 2016 LM3559

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 I2C Timing Requirements (SCL, SDA)
  7. 7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Power Amplifier Synchronization (TX1)
      2. 8.3.2  Input Voltage Flash Monitor Fault
      3. 8.3.3  Independent LED Control
      4. 8.3.4  Hardware Torch
      5. 8.3.5  Fault Protections
        1. 8.3.5.1 Overvoltage Protection
        2. 8.3.5.2 Current Limit
        3. 8.3.5.3 Flash Timeout
        4. 8.3.5.4 Indicator LED/Thermistor (LEDI/NTC)
          1. 8.3.5.4.1 Message Indicator Current Source (LEDI/NTC)
            1. 8.3.5.4.1.1 Message Indicator Example 1 (Single Pulse With Dead Time):
            2. 8.3.5.4.1.2 Message Indicator Example 2 (Multiple Pulses With Dead Time):
            3. 8.3.5.4.1.3 Updating The Message Indicator
      6. 8.3.6  Input Voltage (VIN ) Monitor
      7. 8.3.7  VIN Flash Monitor (Flash Current Rising)
      8. 8.3.8  Last Flash Register
      9. 8.3.9  LED Voltage Monitor
      10. 8.3.10 ADC Delay
      11. 8.3.11 Flags Register and Fault Indicators
        1. 8.3.11.1 Flash Timeout
        2. 8.3.11.2 Thermal Shutdown
        3. 8.3.11.3 LED Fault
        4. 8.3.11.4 TX1 and TX2 Interrupt Flags
        5. 8.3.11.5 LED Thermal Fault (NTC Flag)
        6. 8.3.11.6 Input Voltage Monitor Fault
    4. 8.4 Device Functional Modes
      1. 8.4.1  Start-Up (Enabling the Device)
      2. 8.4.2  Pass Mode
      3. 8.4.3  Flash Mode
      4. 8.4.4  Torch Mode
      5. 8.4.5  Privacy-Indicate Mode
      6. 8.4.6  GPIO1 Mode
      7. 8.4.7  TX2/INT/GPIO2
      8. 8.4.8  TX2 Mode
        1. 8.4.8.1 TX2 Shutdown
      9. 8.4.9  GPIO2 Mode
      10. 8.4.10 Interrupt Output (INT Mode)
      11. 8.4.11 NTC Mode
      12. 8.4.12 Alternate External Torch (AET Mode)
      13. 8.4.13 Automatic Conversion Mode
      14. 8.4.14 Manual Conversion Mode
    5. 8.5 Programming
      1. 8.5.1 I2C-Compatible Interface
        1. 8.5.1.1 START and STOP Conditions
        2. 8.5.1.2 I2C-Compatible Chip Address
        3. 8.5.1.3 Transferring Data
    6. 8.6 Register Maps
      1. 8.6.1  Enable Register
      2. 8.6.2  Torch Brightness Register
      3. 8.6.3  Flash Brightness Register
      4. 8.6.4  Flash Duration Register
      5. 8.6.5  Flags Register
      6. 8.6.6  Configuration Register 1
      7. 8.6.7  Configuration Register 2
      8. 8.6.8  GPIO Register
      9. 8.6.9  Last Flash Register
      10. 8.6.10 VLED Monitor Register
      11. 8.6.11 ADC Delay Register
      12. 8.6.12 Input Voltage Monitor Register
      13. 8.6.13 Privacy Register
      14. 8.6.14 Privacy PWM Period Register
      15. 8.6.15 Indicator Register
      16. 8.6.16 Indicator Blinking Register
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 LM3559 Typical Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Capacitor Selection
          2. 9.2.1.2.2 Input Capacitor Selection
          3. 9.2.1.2.3 Inductor Selection
        3. 9.2.1.3 Application Curves
      2. 9.2.2 LM3559 Typical Application Circuit With Thermistor
        1. 9.2.2.1 Detailed Design Procedure
          1. 9.2.2.1.1 NTC Thermistor Selection
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

10 Power Supply Recommendations

The LM3556 is designed to operate from an input supply range of 2.5 V to 5.5 V. This input supply must be well regulated and provide the peak current required by the LED configuration and inductor selected.