THAB0022_THL3504_Rev.1.00_E_Brief

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Copyright©2012 THine Electronics, Inc.

THine Electronics, Inc.

THL3504

24-channel Constant Current LED Driver with LVDS Interface

DESCRIPTIONS

The THL3504 is an LED driver with 24 channel constant

current sink outputs. The constant current values for

three output groups are determined by external resistors.

The embedded os cillat or an d P W M co nt ro l l er

individually generates 256-step brightness set by the

dedicated registers for each channel.

The serial interface of 2-pair LVDS lines (clock and

data) features high-level noise tolerance, high-speed, and

long-distance transmission.

The LVDS allowing cascaded and multidrop connection

offers the maximum flexibility for designers to place and

connect LED drivers.

The simple and one-way communication protocol is

easily-controlled and requires less CPU resources.

APPLICATIONS

Amusement

LED Backlight

LED Display

Digital Signage

Illumination

FEATURES

< Driver part >

- Constant Current Output: 24 channels

- Output Sink Current: up to 40mA/ch

- Output voltage: up to 40V

- Individual Brightness Control: 256 steps

- Group Brightness Control: 64 steps

- Output disable/enable

< Serial interface part >

- 2-pair Serial LVDS Input or 3-wire Serial CMOS Input

up to 10Mbps

- Bridge Function Converting 3-wire Serial

CMOS Input to 2-pair Serial LVDS Output

- Repeater function of 2-pair Serial LVDS Input / Output

with Waveform and Timing Correction

- Device Address Selection up to 62 addresses

- General call to all devices

Protection Circuits

UVLO, Short Circuit Protection, Thermal Shutdown

Supply Voltage: 3.0~5.5V

Package: QFN 48-pin Exposed Pad

Input Logic

Registers

Constant

Address

Data

PWM Controller

A0~A5

SCL_OUTn

SCL_OUTp

SDA_OUTn

SDA_OUTp

SCL_INn

SCL_INp

SDA_INn

SDA_INp

Oscillator

MODE

CSn

SI

SCK SCL

SDA

Block Diagram

SCL

SDA

REXT0

REXT1

REXT2

Current

Generator

Current Sink

3-wire to 2-wire

Re-timing

conversion

LVDS Input

LVDS Output

OUT0~OUT7 OUT8~OUT15 OUT16~OUT23

Current Sink

Current Sink