PWP

RHB

www.ti.com

FEATURES

APPLICATIONS

DESCRIPTION

6−BitDotCorrection

12−BitGrayscale

PWMControl

DCRegister

GSRegister

Constant-Current

Driver

LEDOpenDetection

Temperature

ErrorFlag

(TEF)

Max.OUTn

Current

6−BitDotCorrection

12−BitGrayscale

PWMControl

DCRegister

GSRegister

Constant-Current

Driver

LEDOpenDetection

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

TLC5945

SLVS755 – MARCH 2007

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

• Monocolor, Multicolor, Full-Color LED

• 16 Channels

Displays

• 12-bit (4096 Steps) Grayscale PWM Control

• LED Signboards

• Dot Correction

• Display Back-lighting

–

6 bit (64 Steps)

• Drive Capability (Constant-Current Sink)

–

0 mA to 80 mA

The TLC5945 is a 16-channel, constant-current sink,

• LED Power Supply Voltage up to 17 V

LED

driver.

Each

channel

has

an

individually

adjustable 4096-step grayscale PWM brightness

• V

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

• Serial Data Interface

correction). The dot correction adjusts the brightness

• 30-MHz Data Transfer Rate

variations between LED channels and other LED

drivers. Both grayscale control and dot correction are

• CMOS Level I/O

accessible via a serial interface. A single external

• Error Information

resistor sets the maximum current value of all 16

–

LOD: LED Open Detection

channels.

–

TEF: Thermal Error Flag

The TLC5945 features two error information circuits.

The LED open detection (LOD) indicates a broken or

disconnected LED at an output terminal. The thermal

error

flag

(TEF)

indicates

an

overtemperature

condition.

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.

PowerPAD is a trademark of Texas Instruments.

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.