SNVU925 October   2024 LP5811

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     Notational Conventions
    3.     Glossary
    4.     Related Documentation
    5.     Support Resources
    6.     Trademarks
  3. 1Introduction/Feature Overview
    1. 1.1 Overview
  4. 2 Register Maps
    1. 2.1  Register Map Table
    2. 2.2  Device_Enable Registers
    3. 2.3  Config Registers
    4. 2.4  Command Registers
    5. 2.5  LED_Enable Registers
    6. 2.6  Fault_Clear Registers
    7. 2.7  Reset Registers
    8. 2.8  Manual_DC Registers
    9. 2.9  Manual_PWM Registers
    10. 2.10 Autonomous_DC Registers
    11. 2.11 LED_0_Autonomous_Animation Registers
    12. 2.12 LED_1_Autonomous_Animation Registers
    13. 2.13 LED_2_Autonomous_Animation Registers
    14. 2.14 LED_3_Autonomous_Animation Registers
    15. 2.15 Flag Registers
  5.   Revision History

1.1 Overview

The LP5811 is a synchronous boost 4-Channel RGBW LED driver with autonomous animation engine control. The device can support 1.8 V minimum start-up voltage and 0.5 V to 5.5 V input voltage range during operation. The integrated synchronous boost converter can output 3 V to 5.5 V, to provide enough forward voltage of LEDs.

The LP5811 has ultra-low operation current at active mode, consuming 0.4 mA when LED maximum current setting is 25.5 mA. If all LEDs are turned off, the device enters standby state to reduce power consumption with data retained. When 'chip_enable' bit setting is 0, initial state is entered with minimum power consumption to save power.

The LP5811 supports both analog dimming and PWM dimming. In analog dimming, the output current of each LED can be adjusted with 256 steps. In PWM dimming, the integrated 8-bit configurable PWM generator enables smooth brightness dimming control. Optional exponential PWM dimming can be activated for individual LED to achieve a human-eye-friendly visual performance.

The LP5811 integrates autonomous animation engine, with no need for brightness control commands from controller. Each LED has an individual animation engine which can be configured through the related registers. The device can generate a 6 MHz clock signal, which synchronizes the lighting effects among multiple devices.

The LP5811 has 4 different material versions with different I2C chip address. Up to 4 LP581x devices can be connected to the same I2C bus and controlled individually.

Device Block DiagramFigure 1-1 Device Block Diagram