Delay

x0

12−BitGrayscale

PWMControl

DCRegister

GSRegister

DCEEPROM

ConstantCurrent

Driver

LEDOpenDetection

Temperature

ErrorFlag

(TEF)

Max.OUTn

Current

Delay

x1

12−BitGrayscale

PWMControl

DCRegister

GSRegister

DCEEPROM

ConstantCurrent

Driver

LEDOpenDetection

Delay

x15

6−BitDot

12−BitGrayscale

PWMControl

DCRegister

GSRegister

DCEEPROM

ConstantCurrent

Driver

LEDOpenDetection

OUT0

OUT1

OUT15

SOUT

SIN

SCLK

IREF

XERR

XLAT

GSCLK

BLANK

DCPRG

DCPRG

DCPRG

VPRG

VPRG

VPRG

GND

VCC

VPRG

Input

Shift

Register

Input

Shift

Register

VPRG

11

0

23

12

191

180

95

90

11

6

5

VPRG

0

0

95

96

191

LEDOpen

Detection

(LOD)

5

95

90

6

11

DCPRG

0

192

96

0

1

0

1

0

1

0

1

GSCounter

CNT

CNT

CNT

CNT

96

96

Status

Information:

LOD,

TED,

DCDATA

192

0

191

1

0

0

1

VREF =1.24V

Correction

6−BitDot

Correction

6−BitDot

Correction

0

1

Blank

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TLC5940

SLVS515D – DECEMBER 2004 – REVISED NOVEMBER 2015

TLC5940 16-Channel LED Driver With DOT Correction and Grayscale PWM Control

1 Features

3 Description

The TLC5940 is a 16-channel, constant-current sink

1

•

16 Channels

LED

driver.

Each

channel

has

an

individually

•

12 bit (4096 Steps) Grayscale PWM Control

adjustable 4096-step grayscale PWM brightness

•

Dot Correction

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

correction). The dot correction adjusts the brightness

–

6 bit (64 Steps)

variations between LED channels and other LED

–

Storable in Integrated EEPROM

drivers. The dot correction data is stored in an

•

Drive Capability (Constant-Current Sink)

integrated EEPROM. Both grayscale control and dot

correction are accessible through a serial interface. A

–

single external resistor sets the maximum current

–

value of all 16 channels.

•

LED Power Supply Voltage up to 17 V

The TLC5940 features two error information circuits.

•

The LED open detection (LOD) indicates a broken or

•

Serial Data Interface

disconnected LED at an output terminal. The thermal

error

flag

(TEF)

indicates

an

overtemperature

•

Controlled In-Rush Current

condition.

•

30 MHz Data Transfer Rate

•

CMOS Level I/O

Device Information(1)

•

Error Information

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

LOD: LED Open Detection

PDIP (28)

35.69 mm × 6.73 mm

–

TEF: Thermal Error Flag

TLC5940

HTSSOP (28)

9.70 mm × 4.40 mm

VQFN (32)

5.00 mm × 5.00 mm

2 Applications

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

•

Monocolor, Multicolor, Full-Color LED Displays

•

LED Signboards

•

Display Backlighting

•

General, High-Current LED Drive

Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.