SNVSCC4A October   2023  – September 2024 LP5811

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Synchronous Boost Converter
        1. 6.3.1.1 Undervoltage Lockout
        2. 6.3.1.2 Enable and Soft Start
        3. 6.3.1.3 Switching Frequency
        4. 6.3.1.4 Current Limit Operation
        5. 6.3.1.5 Boost PWM Mode
        6. 6.3.1.6 Boost PFM Mode
      2. 6.3.2 Analog Dimming
      3. 6.3.3 PWM Dimming
      4. 6.3.4 Autonomous Animation Engine Control
        1. 6.3.4.1 Animation Engine Pattern
        2. 6.3.4.2 Sloper
        3. 6.3.4.3 Animation Engine Unit (AEU)
        4. 6.3.4.4 Animation Pause Unit (APU)
      5. 6.3.5 Protections and Diagnostics
        1. 6.3.5.1 Overvoltage Protection
        2. 6.3.5.2 Output Short-to-Ground Protection
        3. 6.3.5.3 LED Open Detections
        4. 6.3.5.4 LED Short Detections
        5. 6.3.5.5 Thermal Shutdown
    4. 6.4 Device Functional Modes
    5. 6.5 Programming
    6. 6.6 Register Maps
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Application
      2. 7.2.2 Design Parameters
      3. 7.2.3 Detailed Design Procedure
        1. 7.2.3.1 Inductor Selection
        2. 7.2.3.2 Output Capacitor Selection
        3. 7.2.3.3 Input Capacitor Selection
        4. 7.2.3.4 Program Procedure
        5. 7.2.3.5 Programming Example
      4. 7.2.4 Application Performance Plots
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.2.4 Application Performance Plots

The following figures show the application performance plots.

LP5811 Scan Lines and Current Sinks Waveforms of OUT0, OUT1, OUT2, OUT3

PWM frequency = 24kHz

LED_A0/A1/A2 enable

led_mode = 4h

Figure 7-4 Scan Lines and Current Sinks Waveforms of OUT0, OUT1, OUT2, OUT3
LP5811 Scan Lines Switching Waveforms of OUT0, OUT1, OUT2, OUT3
Switch blank time tSW_BLK = 1μs
Figure 7-6 Scan Lines Switching Waveforms of OUT0, OUT1, OUT2, OUT3
LP5811 PWM Alignment Disabled
phase_align_a0 = 0h, phase_align_a1 = 0h, phase_align_a2 = 0h, PWM = 127
Figure 7-8 PWM Alignment Disabled
LP5811 Scan Lines and Current Sinks Waveforms of OUT0, OUT1, OUT2, OUT3
PWM frequency = 12kHzLED_A0/A1/A2 enable

led_mode = 4h

Figure 7-5 Scan Lines and Current Sinks Waveforms of OUT0, OUT1, OUT2, OUT3
LP5811 Scan Lines Switching Waveforms of OUT0, OUT1, OUT2, OUT3
Switch blank time tSW_BLK = 2μs
Figure 7-7 Scan Lines Switching Waveforms of OUT0, OUT1, OUT2, OUT3
LP5811 PWM Alignment Enabled
phase_align_a0 = 1h, phase_align_a1 = 2h, phase_align_a2 = 3h, PWM = 127
Figure 7-9 PWM Alignment Enabled
LP5811 Switching Waveform at Heavy Load
VIN = 3.6V, VOUT = 5V, IOUT = 1A
Figure 7-10 Switching Waveform at Heavy Load
LP5811 Start-up Waveform
VIN = 2.0V, VOUT = 3.3V, 6.6Ω resistance load
Figure 7-12 Start-up Waveform
LP5811 Load Transient
VIN = 3.6V, VOUT = 5V, IOUT = 400mA to 800mA with 20μs slew rate
Figure 7-14 Load Transient
LP5811 Load Sweep
VIN = 3.6V, VOUT = 5V, IOUT = 0A to 800mA Sweep
Figure 7-16 Load Sweep
LP5811 Output Short Protection (Entry)
VIN = 2.5V, VOUT = 3V, 6.6Ω resistance load
Figure 7-18 Output Short Protection (Entry)
LP5811 Switching Waveform at Light Load
VIN = 3.6V, VOUT = 5V, IOUT = 50mA
Figure 7-11 Switching Waveform at Light Load
LP5811 Shutdown Waveform
VIN = 2.0V, VOUT = 3.3V, 6.6Ω resistance load
Figure 7-13 Shutdown Waveform
LP5811 Line Transient
VIN = 2.5V to 4.6V with 20μs slew rate, VOUT = 5V
IOUT = 800mA
Figure 7-15 Line Transient
LP5811 Line Sweep
VIN = 0V to 3V Sweep, VOUT = 3V, 6.6Ω resistance load
Figure 7-17 Line Sweep
LP5811 Output Short Protection (Recover)
VIN = 2.5V, VOUT = 3V, 6.6Ω resistance load
Figure 7-19 Output Short Protection (Recover)