點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

.

3-CHANNEL CONSTANT CURRENT LED DRIVERS

Version:A.003

Page 1

未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任

Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.

DM412

DM412

3-CHANNEL CONSTANT CURRENT LED DRIVERS

WITH LED OPEN DETECTION

General Description

DM412 is a PWM enabled LED driver specifically designed for LED video display or lighting

applications. Each channel has linear adjustable 16-bits (65536 steps) grayscale PWM control

current outputs. It incorporates shift registers, data latches, 3-channel constant current circuitry with

current value set by 3 external resistors, and built-in oscillator for PWM functioning. Data, clock,

and latch buffer outputs are designed for cascading another chip. Its built-in open detection function

help users locate LED failures without additional circuits. The output polarity reverse function is

designed for more high power LED applications.

Features

Maximum constant current outputs: 200mA determined by three external resistors

Maximum sinking output voltage: 17V

Maximum serial-in clock frequency: 20 MHz

16-bit linear PWM control current outputs

Built-in buffers for cascading clock, data, and strobe to next driver

PWM free-running capability (refresh rate (~ 267 Hz) with internal oscillator (~ 17.5 MHz))

Selectable auto/manual strobe (Patent pending)

LED open detection

Output polarity reverse function

Power supply voltage: 4V ~ 5.5V

Applications

LED Decorative Lighting

Indoor/Outdoor LED Video or Message Display

PWM Signal Generator

Package

SSOP16, SOP16 (with exposed pad), TSSOP16 (with exposed pad), QFN16 (with exposed pad)