SNVS873E August   2012  – November 2016

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 Single-Wire Interface Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 LED Driver Headroom Voltage
      2. 7.3.2 Single-Wire Interface
        1. 7.3.2.1 Run Command
        2. 7.3.2.2 Training Start Command
        3. 7.3.2.3 Training End Command
        4. 7.3.2.4 Run-Once Command
      3. 7.3.3 Training Mode
        1. 7.3.3.1 Ending the Training Sequence
        2. 7.3.3.2 Reset to Default
        3. 7.3.3.3 Changing the LED Current
        4. 7.3.3.4 Entering Follow Mode
        5. 7.3.3.5 Timeout
      4. 7.3.4 LED Output Current Setting
      5. 7.3.5 Rise and Fall Time Settings
      6. 7.3.6 LED ON-Time Setting
      7. 7.3.7 LED OFF-Time Setting
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Default Sequence
    6. 7.6 Registers
      1. 7.6.1 Control Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Step-by-Step Design Procedure
        2. 8.2.2.2 Running the Default Blinking Sequence
        3. 8.2.2.3 Programming New Blinking Sequence to the Memory
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

9 Power Supply Recommendations

The LP5560 is designed to operate from an input voltage supply range between 2.7 V and 5.5 V. This input supply must be well regulated. If the input voltage has high noise content TI recommends adding a dedicated ceramic bypass capacitor close to the VDD and GND pins. Depending on the selected LED it may be necessary to increase the minimum input voltage. The minimum input voltage must always be 100 mV higher than the LED maximum forward voltage.