¼

SIN

SCLK

LAT

BLANK

SOUT

GND

VCC

TLC5929

IC1

VCC

¼

¼

¼

SIN

SCLK

LAT

BLANK

R

IREF

IREF

SOUT

TLC5929

ICn

OUT0

OUT15

DATA

SCLK

BLANK

¼

R

IREF

IREF

Controller

GND

VCC

VCC

3

LAT

¼

¼

OUT0

OUT15

¼

SIDRead

VLED

TLC5929

www.ti.com

SBVS159

– APRIL 2011

16-Channel, Constant-Current LED Driver with 7-Bit Global Brightness Control,

Power-Save Mode, and Full Self-Diagnosis for LED Lamp

Check for Samples: TLC5929

1

FEATURES

•

2-ns Delayed Switching Between Each

Channel Minimizes Inrush Current

23

•

16 Constant-Current Sink Output Channels

•

Operating Temperature:

–40°C to +85°C

with On/Off Control

•

Current Capability:

APPLICATIONS

•

Variable Message Signs (VMS)

•

Illumination

•

Global Brightness Control: 7-Bit (128 Steps)

•

LED Video Displays

•

Power-Supply Voltage Range: 3.0 V to 5.5 V

•

LED Power-Supply Voltage: Up to 10 V

DESCRIPTION

•

Constant-Current Accuracy:

The TLC5929 is a 16-channel constant current sink

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

– Channel-to-Channel = ±1% (typ)

writing data to an internal register. The constant

– Device-to-Device = ±2% (typ)

current value of all 16 channels is set by a single

•

Data Transfer Rate: 33 MHz

external resistor with 128 steps for the global

brightness control (BC).

•

BLANK Pulse Width: 40 ns (min)

•

LED Open Detection (LOD)/LED Short

The TLC5929 has six error flags: LED open detection

Detection (LSD) with Invisible Detection Mode

(LOD), LED short detection (LSD), output leakage

(IDM)

detection (OLD), reference current terminal short

detection (ISF), pre-thermal warning (PTW) and

•

Output Leakage Detection (OLD) Detects 3

µA

thermal error flag (TEF). In addition, the LOD and

Leak

LSD functions have invisible detection mode (IDM)

•

Pre-Thermal Warning (PTW)

that can detect those errors even when the output is

off. The error detection results can be read via a

•

Thermal Shutdown (TSD)

serial interface port.

•

Current Reference Terminal Short Flag (ISF)

The TLC5929 also has a power-save mode that sets

•

Power-Save Mode with 10-

µA Consumption

the total current consumption to 10

µA (typ) when all

•

Undervoltage Lockout Sets the Default Data

outputs are off.

Typical Application Circuit (Multiple Daisy-Chained TLC5929s)

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.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright

© 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.