LP5813 datasheet(12/60 Pages) TI

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9 Detailed Description

9.1 Overview

The LP5813 is a synchronous boost 4 × 3 matrix RGB 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. Time-cross-multiplexing (TCM) scheme can support up to 4×3 matrix for 12 LEDs or 4 RGB LEDs, by ¼

multiplexing ratio of the scan switches.

The LP5813 has ultra-low operation current at active mode, consuming about 0.4 mA when LED maximum

current setting is 25.5 mA. If all LEDs are turned off, the device will enter 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 LP5813 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 LP5813 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 LP5813 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. The LP5813 materials and corresponding chip

addresses are shown in Device Comparison.

LP5813

SNVSC74 – SEPTEMBER 2023

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LP5813 Datasheet(PDF) 12 Page - Texas Instruments