SNVSC74C September   2023  – February 2025 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

9.2.2 Design Parameters

Design Parameters shows the typical design parameters of Figure 9-1.

Table 9-1 Design Parameters
PARAMETER VALUE
Input voltage 3.6V to 4.2V by one Li-on battery cell
Output voltage 4.5V
Inductor 1µH
Output capacitor 22µF
RGB LED count 4
LED maximum average current (red, green, blue) 12.75mA, 10.2mA, 10.2mA
LED peak current (red, green, blue) 51mA, 40.8mA, 40.8mA
LED PWM frequency 6kHz

The different color of LEDs are put as below configuration.

Red LEDs: LED_A1, LED_B1, LED_C1, LED_D1

Green LEDs: LED_A0, LED_B0, LED_C0, LED_D0

Blue LEDs: LED_A2, LED_B2, LED_C2, LED_D2