SW

GND_SW

R1

G1

B1

R2

G2

B2

Li-Ion

Battery

Or

Charger

FB

8-Bit IDAC

D

A

MCU

SCK/SCL

SI/A0

SS/SDA

IF_SEL

LDO

BIAS

REF

THSD

POR

OSC

SPI

I2C

CONTROL

BG

BOOST

PWM

RGB

Up to

40 mA/

LED

ASE1

SINGLE

ENDED

ANALOG

AUDIO

AUDIO

SYNC

SO

IRGB

IRT

D1

Logic supply

GNDA

GND

100 nF

1 µF

100 nF

10 µF

100 nF

10 µF

D

A

ASE2

PWM

CTRL

GND_RGB2

GND_RGB1

R3

G3

B3

R4

G4

B4

Audio

Synchronized

LED up to

15 mA

ALED

NRST

4.7 µH

LP55281

SNVS458B – JUNE 2007 – REVISED JUNE 2007

www.ti.com

Block Diagram

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

4

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Product Folder Links: LP55281