www.ti.com

D Q

FF

FF

FF

LAT

LAT

LAT

VCC

XDOWN

SW0

SW1

SW15

16

16[output] Constant

Current Driver

with Dot Correction

PGND

OUT15

OUT0

D Q

FF

LAT

FF

LAT

FF

LAT

DC15[6]

BLANK

0

1

0

0

0

1

XLAT

SCLK

SIN

IREF

GND

SOUT

D Q

D Q

D Q

D Q

D Q

D Q

D Q

D Q

D Q

D Q

DC0[1]

DC0[0]

BLANK

1

1

TLC5922

SLVS486 – SEPTEMBER 2003

LED DRIVER

FEATURES

DESCRIPTION

•

16 Channels

The TLC5922 is a constant-current sink driver with 128

steps of adjustable current value (dot-correction). Each

•

Drive Capability

of the 16 channels has an individually controlled

– 0 to 80 mA (Constant-Current Sink) x 16 ch

dot-correction and an ON/OFF state. Both the ON/OFF

•

Constant Current Accuracy

and dot-correction have their respective modes set via

–

±1% (typ)

1 port of serial I/F. The maximum current value of the

constant-current output of all 16 channels is pro-

•

1 Port of Serial Data Input/Output

grammed by a single external resistor. An external

•

processor programs each of the 16 channels of the

TLC5922 with the desired ON/OFF state and

•

CMOS Input/Output

dot-correction value through a single serial interface.

•

30 MHz Data Transfer Rate

After all data is loaded, the processor then latches the

•

Vcc = 3 V to 5.5 V

information into the TLC5922 and enables the outputs.

•

Operating Temperature = -20

°C to 85 °C

The TLC5922 includes two error flags. First is the LED

open detection (LOD) which indicates a broken LED at

•

LED Supply Voltage up to 17 V

an output terminal. The second is a thermal error flag

•

(TEF) which indicates an over temperature condition.

•

Dot Correction

The TLC5922 has two methods to communicate these

– 128-Step For Each Individual 16 ch

error flags to the external processor. One method is on

a dedicated output pin, XDOWN. The other method is

•

Controlled In-Rush Current

through the serial data output pin, SOUT.

•

Error Information

– LOD: LED Open Detection

– TEF: Thermal Error Flag

APPLICATIONS

•

LED Display

•

LED Signboard

FUNCTIONAL 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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003, Texas Instruments Incorporated

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily in-

clude testing of all parameters.