PWP

RHB

NT

1

FEATURES

APPLICATIONS

DESCRIPTION

Delay

x0

6−BitDotCorrection

12−BitGrayscale

PWMControl

DCRegister

GSRegister

Constant-Current

Driver

LEDOpenDetection

Temperature

ErrorFlag

(TEF)

Max.OUTn

Current

Delay

x1

6−BitDotCorrection

12−BitGrayscale

PWMControl

DCRegister

GSRegister

Constant-Current

Driver

LEDOpenDetection

Delay

x15

6−BitDotCorrection

12−BitGrayscale

PWMControl

DCRegister

GSRegister

Constant-Current

Driver

LEDOpenDetection

OUT0

OUT1

OUT15

SOUT

SIN

SCLK

IREF

XLAT

GSCLK

BLANK

GND

VCC

MODE

Input

Shift

Register

Input

Shift

Register

MODE

11

0

23

12

191

180

95

90

5

MODE

0

95

96

191

LEDOpen

Detection

(LOD)

6

11

0

192

96

0

1

0

1

0

1

GSCounter

CNT

CNT

CNT

CNT

96

96

Status

Information:

LOD,

TED,

DCDATA

192

0

191

VREF

=1.24V

XERR

TLC5941

SLVS589D – JULY 2005 – REVISED JANUARY 2008

www.ti.com

16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL

• Monocolor, Multicolor, Full-Color LED Displays

2

• 16 Channels

• LED Signboards

• 12-Bit (4096 Steps) Grayscale PWM Control

• Display Back-Lighting

• Dot Correction

–

6 Bit (64 Steps)

• Drive Capability (Constant-Current Sink)

The TLC5941 is a 16-channel, constant-current sink,

–

0 mA to 80 mA

LED

driver.

Each

channel

has

an

individually

• LED Power Supply Voltage up to 17 V

adjustable 4096-step grayscale PWM brightness

control and a 64-step constant-current sink (dot

• V

correction). The dot correction adjusts the brightness

• Serial Data Interface

variations between LED channels and other LED

• Controlled In-Rush Current

drivers. Both grayscale control and dot correction are

accessible via a serial interface. A single external

• 30-MHz Data Transfer Rate

resistor sets the maximum current value of all 16

• CMOS Level I/O

channels.

• Error Information

The TLC5941 features two error information circuits.

–

LOD: LED Open Detection

The LED open detection (LOD) indicates a broken or

–

TEF: Thermal Error Flag

disconnected LED at an output terminal. The thermal

error

flag

(TEF)

indicates

an

overtemperature

condition.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2008, 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.