1

FEATURES

APPLICATIONS

DESCRIPTION

¼

¼

¼

GSDATA

GSSCLK

XGSLAT

BLANK

ERROR

READ

DCSCLK

DCDATA

XDCLAT

R

IREF

GSSIN

GSSCLK

XGSLAT

BLANK

DCSIN

DCSCLK

XDCLAT

IREF

GSSOUT

DCSOUT

VCC

GND

VCC

TLC5942

IC1

OUT0

OUT15

VLED

VLED

¼

¼

R

IREF

GSSIN

GSSCLK

XGSLAT

BLANK

DCSIN

DCSCLK

XDCLAT

IREF

GSSOUT

VCC

GND

VCC

TLC5942

ICn

OUT0

OUT15

VLED

VLED

Controller

forGrayscale

(Outsideof

LEDmodule)

Controllerfor

DotCorrection

with

Correction

DataROM

(Insideof

LEDmodule)

TLC5942

SBVS096B – OCTOBER 2007 – REVISED OCTOBER 2007

www.ti.com

16-Channel, 12-Bit PWM LED Driver with

7-Bit Dot Correction

• Readable Error Information:

23

• 16 Channels, Constant Current Sink Output

–

LED Open Detection

• 50-mA Capability (Constant Current Sink)

–

Thermal Error Flag (TEF)

• 12-Bit (4096 Steps) Grayscale Control with

• Noise Reduction:

PWM

–

4-Channel grouped delay to prevent inrush

• 7-Bit (128 Steps) Dot Correction with Sink

current

Current

• Operating Temperature: –40°C to +85°C

• LED Power-Supply Voltage up to 17 V

• Constant Current Accuracy:

• Monochrome, Multicolor, Full-Color LED

–

Channel-to-Channel = ±1.5%

Displays

–

Device-to-Device = ±3%

• LED Signboards

• VCC = 3.0 V to 5.5 V

• Display Backlighting

• CMOS Level I/O

• 30-MHz Data Transfer Rate

• 30-MHz Grayscale Control Clock

The TLC5942 is a 16-channel, constant current sink

• Dedicated Ports for Grayscale and Dot

driver. Each channel is individually adjustable with

4096 pulse-width modulated (PWM) steps and 128

Correction

constant current sink steps for dot correction. Dot

• Continuous Base LED Open Detection (LOD)

correction adjusts the brightness variations between

• Thermal Shutdown (TSD):

LEDs. Both grayscale control and dot correction are

accessible via separate, dedicated serial interface

–

Automatic shutdown at high temperature

ports. The maximum current value of all 16 channels

conditions

can be set by a single external resistor.

–

Restart under normal temperature

Typical Application Circuit (Multiple Daisy-Chained TLC5942s)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments, Inc.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Not Recommended for New Designs