On/Off

Input

Shift

Register

DC Input

Shift

Register

7−bit DC Register

Delay

x0

Constant Current

Driver

LOD

MODE

0

1

MODE

0

1

0

15

111

0

On/Off Register

0

6

0

0

0

1

Temperature

Error Flag

(TEF)

LED Open

Detection

(LOD)

7−bit DC Register

Delay

x1

Constant Current

Driver

LOD

On/Off Register

7

13

1

1

7−bit DC Register

Delay

x15

Constant Current

Driver

LOD

On/Off Register

105

111

15

15

BLANK

0

Max. OUTn

Current

GND

VCC

SIN

SCLK

SOUT

IREF

XERR

XLAT

MODE

OUT0

OUT1

OUT15

PGND

BLANK

BLANK

BLANK

16

16

112

1

RHB

DAP

TLC5923

www.ti.com

SLVS550B – DECEMBER 2004 – REVISED JANUARY 2013

16-CHANNEL LED DRIVER WITH DOT CORRECTION

Check for Samples: TLC5923

1

FEATURES

–

TEF: Thermal Error Flag

2

•

16 Channels

APPLICATIONS

•

Drive Capability

•

Monocolor, Multicolor, Fullcolor LED Display

–

0 to 80 mA (Constant-Current Sink)

•

Monocolor, Multicolor LED Signboard

•

Constant Current Accuracy: ±1% (typical)

•

Display Backlighting

•

Serial Data Interface

•

Multicolor LED lighting applications

•

•

CMOS Level Input/Output

DESCRIPTION

•

30 MHz Data Transfer Rate

The TLC5923 is a 16 channel constant-current sink

•

driver. Each channel has a On/Off state and a 128-

step adjustable constant current sink (dot correction).

•

Operating Temperature = –40°C to 85°C

The dot correction adjusts the brightness variations

•

LED Supply Voltage up to 17 V

between LED, LED channels and other LED drivers.

•

32-pin HTSSOP( PowerPAD™) and QFN

Both dot correction and On/Off state are accessible

Packages

via a serial data interface. A single external resistor

sets the maximum current of all 16 channels.

•

Dot Correction

The TLC5923 features two error information circuits.

–

7 bit (128 Steps)

The LED open detection (LOD) indicates a broken or

–

individual adjustable for each channel

disconnected LED at an output terminal. The thermal

•

Controlled In-Rush Current

error

flag

(TEF)

indicates

an

overtemperature

•

Error Information

condition.

–

LOD: LED Open Detection

FUNCTIONAL BLOCK DIAGRAM

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 © 2004–2013, 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.