¼

¼

¼

SIN

SCLK

LAT

BLANK

SOUT

GND

VCC

TLC5928

IC1

OUT0

OUT15

VCC

¼

¼

VLED

VLED

¼

¼

SIN

SCLK

LAT

BLANK

R

IREF

IREF

SOUT

TLC5928

ICn

OUT0

OUT15

DATA

SCLK

BLANK

ERROR

READ

¼

VLED

VLED

R

IREF

IREF

Controller

GND

VCC

VCC

3

LAT

TLC5928

www.ti.com

SBVS120E

– JULY 2008 – REVISED JANUARY 2011

16-Channel, Constant-Current LED Driver with LED Open Detection

Check for Samples: TLC5928

1

FEATURES

APPLICATIONS

•

LED Video Displays

23

•

16 Channels, Constant-Current Sink Output

with On/Off Control

•

Message Boards

•

Illumination

•

35-mA Capability (Constant-Current Sink)

•

10-ns High-Speed Constant-Current Switching

DESCRIPTION

Transient Time

The TLC5928 is a 16-channel, constant-current sink

•

Low On-Time Error

LED driver. Each channel can be turned on/off by

•

LED Power-Supply Voltage up to 17 V

writing serial data to an internal register. The

•

constant-current value of all 16 channels is set by a

•

Constant-Current Accuracy:

single external resistor.

– Channel-to-Channel = ±1%

The TLC5928 has two error detection circuits: one for

LED open detection (LOD) and one for a pre-thermal

– Device-to-Device = ±1%

warning

(PTW).

LOD

detects

a

broken

or

•

CMOS Logic Level I/O

disconnected LED and LEDs shorted to GND while

•

35-MHz Data Transfer Rate

the constant-current output is on. PTW indicates a

•

20-ns BLANK Pulse Width

high temperature condition.

•

Readable Error Information:

– LED Open Detection (LOD)

– Pre-Thermal Warning (PTW)

•

Operating Temperature:

–40°C to +85°C

Typical Application Circuit (Multiple Daisy-Chained TLC5928s)

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, Inc.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

© 2008–2011, 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.