1

FEATURES

APPLICATIONS

DESCRIPTION

¼

¼

¼

SIN

SCLK

BCSEL

XLAT

BLANK

GSCLK

SOUT

XERR

VCC

GND

VCC

TLC5943

IC1

OUT0

OUT15

XTEST

¼

¼

VLED

VLED

¼

¼

SIN

SCLK

BCSEL

XLAT

BLANK

GSCLK

R

IREF

IREF

SOUT

TLC5943

ICn

OUT0

OUT15

DATA

SCLK

BCSEL

XLAT

BLANK

GSCLK

FLAGS

READ

XERR

READ

¼

VLED

VLED

VCC

R

IREF

IREF

Controller

XERR

VCC

GND

VCC

XTEST

5

XTESTpinmustbeconnectedtoVCCorGND.

TLC5943

SBVS101 – DECEMBER 2007

www.ti.com

16-Channel, 16-Bit PWM LED Driver with

7-Bit Global Brightness Control

• Readable Error Information:

23

• 16 Channels, Constant Current Sink Output

–

LED Open Detection (LOD)

• 50-mA Capability (Constant Current Sink)

–

Thermal Error Flag (TEF)

• 16-Bit (65,536 Steps) Grayscale Control with

• Noise Reduction:

Enhanced Spectrum (ES) PWM

–

4-channel grouped delay to prevent inrush

• 7-Bit (128 Steps) Global Brightness Control for

current

All Channels with Sink Current

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

• LED Power-Supply Voltage up to 17 V

• V

• Monochrome, Multicolor, Full-Color LED

• Constant Current Accuracy:

Displays

–

Channel-to-Channel = ±1.5%

• LED Signboards

–

Device-to-Device = ±3%

• Display Backlighting

• CMOS Level I/O

• 30-MHz Data Transfer Rate

• 33-MHz Grayscale Control Clock

The TLC5943 is a 16-channel, constant current sink

• Auto Display Repeat

driver. Each channel is individually adjustable with

65,536 enhanced spectrum pulse-width modulated

• Auto Data Refresh

(PWM) steps controlled by grayscale (GS) data. All

• Continuous Base LED Open Detection (LOD):

output drivers are adjustable with 128 constant sink

–

Detect LED opening and LED short to GND

current steps at same value controlled by brightness

control (BC) data. Both GS data and BC data are

during display

writable via a serial interface port. The maximum

• Thermal Shutdown (TSD):

current value of all 16 channels can be set by a

–

Automatic shutdown at high temperature

single external resistor.

conditions

–

Restart under normal temperature

Typical Application Circuit (Multiple Daisy-Chained TLC5943s)

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.