點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

.

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 16-bit PWM Constant Current LED Driver

Version:PRE.001

Preliminary

Page 1

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DM632B

DM632B

16-CHANNEL CONSTANT CURRENT LED DRIVER

WITH 16-bit PROGRAMMABLE PWM OUTPUTS

General Description

DM632B is a 16-channel constant current sink LED driver. Each channel has independent

16-bits (65536 steps) grayscale PWM control current outputs. It incorporates shift registers, data

latches, constant current circuitry with current value set by an external resistor, and built-in LED

open detection circuit to detect error status. It combines the selections with rising / falling edge

serial out, auto-reload/one-shot PWM output, internal/external grayscale clock source. It is

specifically designed for LED display or lighting applications.

Features

Constant-current outputs: 5mA to 60mA adjustable by one external resistor

16-bit linear PWM control current outputs for each channel

Maximum output voltage: 17V

Maximum clock frequency: 25MHz

Auto-Reload / One-Shot Mode selection.

Serial out clock edge selection – Rising / Falling edge selection

Internal / External PWM clock mode selection

Built-in real-time open detection

Package and pin assignment compatible to conventional LED drivers

(DM134/5/6, DM13C)

Power supply voltage: 3.3V to 5V

Schmitt Trigger input

Output channel delay

Applications

Indoor/Outdoor LED Video Display

LED Variable Message Signs (VMS) System

LED Decorative Lighting

Package Types

DIP24B, SOP24B, SSOP24, TSSOP24E (with exposed pad)