MCU

R3

G3

B3

R4

G4

B4

IRGB

IRT

ASE2

AUDIO

INPUTS

LP55281

SW

BATTERY

FB

VDDA

VREF

D1

VDD2

VDD1

GNDs

SCK/SCL

SI/A0

SS/SDA

SO

IF_SEL

VDDIO

RGB3

RGB4

RRT

RRGB

COUT

10 P

F

IMAX = 300...400 mA

VOUT = 4...5.3V

CVDD

100 nF

Lboost

CIN

10 P

F

CVDDA

1 é

F

CREF

100 nF

CVDDIO

100 nF

ALED

RGB1

RGB2

R1

G1

B1

R2

G2

B2

ASE1

4.7 P

H

Copyright © 2016, Texas Instruments Incorporated

NRST

31

LP55281

www.ti.com

SNVS458D – JUNE 2007 – REVISED OCTOBER 2016

Product Folder Links: LP55281

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Copyright © 2007–2016, Texas Instruments Incorporated

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LP55281 quadruple RGB driver with integrated boost converter provides a complete solution for driving up to

12 LEDs via either I2C or SPI interface.

8.2 Typical Application

Figure 26. LP55281 Typical Application