SNVSC74B September   2023  – December 2024 LP5813

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  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 Timing Requirements
    7. 6.7 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 Synchronous Boost Converter
        1. 7.3.1.1 Undervoltage Lockout
        2. 7.3.1.2 Enable and Soft Start
        3. 7.3.1.3 Switching Frequency
        4. 7.3.1.4 Current Limit Operation
        5. 7.3.1.5 Boost PWM Mode
        6. 7.3.1.6 Boost PFM Mode
        7. 7.3.1.7 Pass-Through Mode
      2. 7.3.2 Time-Cross-Multiplexing (TCM) Scheme
        1. 7.3.2.1 Direct drive mode
        2. 7.3.2.2 TCM Drive Mode
        3. 7.3.2.3 Mix drive mode
        4. 7.3.2.4 Ghosting Elimination
      3. 7.3.3 Analog Dimming
      4. 7.3.4 PWM Dimming
      5. 7.3.5 Autonomous Animation Engine Control
        1. 7.3.5.1 Animation Engine Pattern
        2. 7.3.5.2 Sloper
        3. 7.3.5.3 Animation Engine Unit (AEU)
        4. 7.3.5.4 Animation Pause Unit (APU)
      6. 7.3.6 Protections and Diagnostics
        1. 7.3.6.1 Overvoltage Protection
        2. 7.3.6.2 Output Short-to-Ground Protection
        3. 7.3.6.3 LED Open Detections
        4. 7.3.6.4 LED Short Detections
        5. 7.3.6.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
  9. 8 Register Map Table
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Application
      2. 9.2.2 Design Parameters
      3. 9.2.3 Detailed Design Procedure
        1. 9.2.3.1 Inductor Selection
        2. 9.2.3.2 Output Capacitor Selection
        3. 9.2.3.3 Input Capacitor Selection
        4. 9.2.3.4 Program Procedure
        5. 9.2.3.5 Programming Example
      4. 9.2.4 Application Performance Plots
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.5 Autonomous Animation Engine Control

The LP5813 supports both manual mode and autonomous mode to control the DC and PWM of each LED. In manual mode, the LEDs are directly controlled by the related configuration registers and reflect the value immediately. In autonomous mode, the autonomous animation engine is applied for each LED, which can realize vivid lighting effects without external processor control. The animation engine pattern is composed by 3 animation engine units (AEU) and 2 animation pause units (APU) for complex and flexible control. One AEU is formed by 4 slopers, which is used for fading effect.

After setting up all animation engine pattern configurations, sending start_cmd to the device can let the animation running autonomously, to free external controller real-time loading. The PWM value and unit status of each LED can be read from PWM_value registers and pattern_status registers. To make sure the precision of reading results, sending pause_cmd to pause the animation firstly is recommended.