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UCS1903

3-Channel LED Driver / Controller

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UCS1903

3-Channel LED Driver / Controller

GENERAL DESCRIPTION

The UCS1903 is a 3-channel LED display

driver / controller with a built-in MCU digital

interface, data latches and LED high

voltage driving functions. It features superior

performances and reliable functions. Under

the control of the external MCU, it performs

independent grayscale control and cascading

control for driving large outdoor colour dot-

matrix LED panels.

FEATURES

l Unlimited cascading is possible in linear

transfer mode.

l Over 10-meter transfer distance between

any two points. No additional circuitry is

necessary.

l At the refresh speed of 30 frames / s,

up to 512 cascaded dots are possible

at the low-speed mode, and up to 1024

cascaded dots are possible at the high-

speed mode.

l Data transfer rates of up to 400kbps or

800kbps.

l 12V-rated output port.

l 6V to 12V operating voltage.

l Grayscle adjustment function (256-level

adjustable grayscle).

l Built-in dual RC oscillators for clock

PIN CONFIGURATION

SOP8

synchronization with the signals on the

data line. After the first data is received,

the subsequent data will be shaped and

forwarded automatically.

l Built-in power-on reset function.

l 256-level adjustment is possible through

the PWM control, with the scanning

frequency up to 400Hz/s.

l Serial cascade interface, with the data

received and decoded on one wire.

OUTR

OUTG

OUTB

GND

VDD

SET

DIN

DOUT

PIN DESCRIPTION

Number

1

2

3

4

Symbol

OUTR

OUTG

OUTB

GND

Name

LED drive output

LED drive output

LED drive output

Ground

Function Description

Red PWM control output

Green PWM control output

Blue PWM control output

Ground

V. 1.0

1 of 9

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