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

10 Layout

10.1 Layout Guidelines

  • Normally the LP5560 device does not require any external components except for the LED. However, in a noisy environment a small 0.1-µF bypass capacitor can be connected between VIN and GND pins.
  • TI recommends routing the pins in a 45-degree angle to avoid component rotation during soldering process.
  • Use traces with similar width for all pins. This makes the exposed copper area similar for all pins and improves the soldering reliability.
  • Obtain the minimum clearance and trace width from the manufacturer of the PCB used for the board.

10.2 Layout Example

LP5560 Layout_Example_SNVS873.gif Figure 27. LP5560 Layout Example