1

FEATURES

APPLICATIONS

DESCRIPTION

¼

¼

V

CC

¼

¼

¼

DATA

SCLK

LAT

BLANK

¼

R

IREF

Controller

3

ERROR

READ

¼

SIN

SCLK

LAT

SOUT

V

CC

GND

TLC5952

IC1

OUTR0

OUTB7

BLANK

IREF

V

LED

+

V

CC

R

IREF

¼

SIN

SCLK

LAT

SOUT

V

CC

GND

TLC5952

ICn

OUTR0

OUTB7

BLANK

IREF

TLC5952

24-Channel, Constant-Current LED Driver with

Global Brightness Control and LED Open-Short Detection

• Operating Temperature: –40°C to +85°C

23

• 24-Channel Constant-Current Sink Output with

• Packages: HTSSOP-32, QFN-32

On/Off Control

• Current Capability:

• Full-Color LED Displays

–

35 mA for 16 Channels

• LED Signboards

–

26.2 mA for 8 Channels

• Global Brightness Control (BC) for Each Color

Group: 7-Bit (128 Step), Three Groups

The TLC5952 is a 24-channel, constant-current sink

• LED Power-Supply Voltage up to 15 V

driver. Each channel can be turned on/off with

• V

internal register data. The output channels are

• Constant-Current Accuracy:

grouped into three groups of eight channels each.

Each channel group has a 128-step global brightness

–

Channel-to-Channel = ±1%

control (BC) function. Both on/off data and BC are

–

Device-to-Device = ±3%

writable via a serial interface. The maximum current

• CMOS Logic Level I/O

value of all 24 channels is set by a single external

resistor.

• Data Transfer Rate: 35 MHz

• BLANK Pulse Width: 15 ns

The TLC5952 has three error detection circuits: LED

open detection (LOD), LED short detection (LSD),

• Open Load, Short Load, and Over-Temperature

and a thermal error flag (TEF). The error detection is

Detection

read via a serial interface.

• Thermal Shutdown (TSD) with Auto Restart

• Delay Switching to Prevent Inrush Current

Typical Application Circuit (Multiple Daisy-Chained TLC5952s)

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, Incorporated.

3

All other trademarks are the property of their respective owners.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2009, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.