Synchronous boost 4 x 3 matrix RGB LED driver with I2C and auto animation control

The LP5813 is a

synchronous boost

4 × 3 matrix RGB LED driver with

autonomous animation engine control. The device is ideal to support battery-powered

applications with 0.5V to 5.5V input voltage range, and it has ultra-low normal

operation current with 0.4mA (typical) when illuminate LEDs.

The integrated synchronous boost

converter maintains excellent efficiency and keeps the brightness of LEDs stable over a wide

operating voltage range. Output voltage can be selected for different LED forward voltage

from 3V to 5.5V with 0.1V step. The boost converter can power not only the LEDs driven by

the device itself, but also other loads in the system. If the boost converter need to be

bypassed, VOUT is used as the power supply input for the LED driver blocks.

The time-cross-multiplexing (TCM)

structure is adopted, which uses 4 output pins to control 12 LED dots individually. Both

high-side scan switch and low-side current sink are contained in one output. The total

solution size are minimized for space limited system.

The autonomous animation engine can

significantly reduce the real-time loading of controller. Each LED can be configured through

the related registers to realize vivid and fancy lighting effects. The device can generate

6MHz clock signal and use it for synchronizing the lighting effects among multiple devices.