點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

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新竹市科學園區展業一路9號7樓之1

9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.

Tel：886-3-5645656

Fax：886-3-5645626

16-channel 12-bit PWM Constant Current LED Driver

Version:A.003

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DM631

DM631

16-CHANNEL CONSTANT CURRENT LED DRIVER

WITH PROGRAMMABLE PWM OUTPUTS

General Description

DM631 is a 16-channel constant current sink LED driver. Each channel has adjustable 12-bits

(4096 steps) grayscale PWM control current outputs. It incorporates shift registers, data latches,

constant current circuitry with current value set by an external resistor, selectable oscillator source

for PWM function, and built-in LED open detection circuit to detect error status. It is specifically

designed for LED display or lighting applications.

Features

Constant-current outputs: 5mA to 90mA adjustable by one external resistor

12-bit PWM control current outputs for each channel

Maximum output voltage: 17V

Maximum clock frequency: 25MHz

Selectable internal/external PWM reference clock

PWM free-running capability (refresh rate (~4.4KHz) with internal oscillator (~ 18 MHz))

Build-in real-time LED open detection

Package and pin assignment (except QFN32) compatible to pure LED drivers series

(ST2221C, DM134/5/6, DM13C)

Power supply voltage: 3.3V to 5.5V

Applications

Indoor/Outdoor LED Video Display

LED Variable Message Signs (VMS) System

LED Decorative Lighting

Package Types

SOP24, SOP24B, SSOP24, TSSOP24E (with exposed pad), QFN32 (with exposed pad)