SNVSCC4C October   2023  – February 2025 LP5811

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
      2. 7.3.2 Analog Dimming
      3. 7.3.3 PWM Dimming
      4. 7.3.4 Autonomous Animation Engine Control
        1. 7.3.4.1 Animation Engine Pattern
        2. 7.3.4.2 Sloper
        3. 7.3.4.3 Animation Engine Unit (AEU)
        4. 7.3.4.4 Animation Pause Unit (APU)
      5. 7.3.5 Protections and Diagnostics
        1. 7.3.5.1 Overvoltage Protection
        2. 7.3.5.2 Output Short-to-Ground Protection
        3. 7.3.5.3 LED Open Detections
        4. 7.3.5.4 LED Short Detections
        5. 7.3.5.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
    6. 7.6 Register Maps
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Parameters
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Inductor Selection
        2. 8.2.3.2 Output Capacitor Selection
        3. 8.2.3.3 Input Capacitor Selection
        4. 8.2.3.4 Program Procedure
        5. 8.2.3.5 Programming Example
      4. 8.2.4 Application Performance Plots
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

LP5811 LP5811 YBH Package 12-Pin DSBGA Top View Figure 5-1 LP5811 YBH Package 12-Pin DSBGA Top View

LP5811 LP5811 DRR Package 12-Pin WSON Top View

Figure 5-2 LP5811 DRR Package 12-Pin WSON Top View
Table 5-1 Pin Functions
PIN TYPE(1) DESCRIPTION
NAME YBH DRR
EN A1 11 I Enable input of the integrated boost converter.
VIN A2 12 P Power supply of the device. A 10 μF capacitor is recommended to be connected between this pin with GND and be placed as close to the device as possible.
SW A3 1 P Switch pin of the integrated boost converter, which is connected to the drain of low-side power FET and source of high-side rectifier FET. Connect the inductor to this pin
OUT0 B1 10 O Output 0 which contains current sink 0 and high-side scan FET 0. If not used, this pin must be floating.
GND B2 3 G Ground. Must be connected to the common ground plane
VOUT B3 2 P Boost converter output. A 22 uF capacitor is recommended to be connected between this pin with GND and be placed as close to the device as possible.
OUT1 C1 9 O Output 1 which contains current sink 1 and high-side scan FET 1. If not used, this pin must be floating.
SYNC C2 4 I/O Synchronous between multiple devices. If not used, this pin can be connected to ground to save power.
SCL C3 5 I I2C serial interface clock input.
OUT2 D1 8 O Output 2 which contains current sink 2 and high-side scan FET 2. If not used, this pin must be floating.
OUT3 D2 7 O Output 3 which contains current sink 3 and high-side scan FET 3. If not used, this pin must be floating.
SDA D3 6 I/O I2C serial interface data input/output.
(1) P: Power Pin; I: Input Pin; I/O: Input/Output Pin; O: Output Pin.