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APPLICATIONS

DESCRIPTION

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

TLC5923

SLVS550 – DECEMBER 2004

LED DRIVER

•

Monocolor, Multicolor, Fullcolor LED Display

•

16 Channels

•

Monocolor, Multicolor LED Signboard

•

Drive Capability

•

Display Backlighting

– 0 to 80 mA (Constant-Current Sink)

•

Multicolor LED lighting applications

•

Constant Current Accuracy

–

±1% (typical)

•

Serial Data Interface

The TLC5923 is a 16 channel constant-current sink

•

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

•

CMOS Level Input/Output

128-step adjustable constant current sink (dot correc-

tion). The dot correction adjusts the brightness vari-

•

30 MHz Data Transfer Rate

ations between LED, LED channels and other LED

•

drivers. Both dot correction and On/Off state are

•

Operating Temperature = -20

°C to 85 °C

accessible via a serial data interface. A single exter-

nal resistor sets the maximum current of all 16

•

LED Supply Voltage up to 17 V

channels.

•

32-pin HTSSOP (PowerPAD™) Package

The TLC5923 features two error information circuits.

•

Dot Correction

The LED open detection (LOD) indicates a broken or

– 7 bit (128 Steps)

disconnected LED at an output terminal. The thermal

– individual adjustable for each channel

error flag (TEF) indicates an overtemperature con-

dition.

•

Controlled In-Rush Current

•

Error Information

– LOD: LED Open Detection

– TEF: Thermal Error Flag

Figure 1. Function Block Diagram

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 © 2004, 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.