Datasheet > TLC5947_17

TLC5947_17

更新时间： 2024-11-20 02:58:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
29页	1308K
描述
24-Channel, 12-Bit PWM LED Driver With Internal Oscillator

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TLC5947_17 数据手册

TLC5947

www.ti.com ................................................................................................................................................. SBVS114A–JULY 2008–REVISED SEPTEMBER 2008

24-Channel, 12-Bit PWM LED Driver with

Internal Oscillator

FEATURES

•

Noise Reduction:

•

24 Channels, Constant Current Sink Output

30-mA Capability (Constant Current Sink)

12-Bit (4096 Steps) PWM Grayscale Control

LED Power-Supply Voltage up to 30 V

V_CC= 3.0 V to 5.5 V

–

4-channel grouped delay to prevent inrush

current

•

Operating Temperature: –40°C to +85°C

APPLICATIONS

•

Static LED Displays

Message Boards

Amusement Illumination

TV Backlighting

Constant Current Accuracy:

–

Channel-to-Channel = ±2% (typ)

Device-to-Device = ±2% (typ)

•

CMOS Logic Level I/O

DESCRIPTION

30-MHz Data Transfer Rate (Standalone)

15-MHz Data Transfer Rate (Cascaded Devices,

SCLK Duty = 50%)

The TLC5947 is a 24-channel, constant current sink

LED driver. Each channel is individually adjustable

with 4096 pulse-width modulated (PWM) steps. PWM

control is repeated automatically with the

programmed grayscale (GS) data. GS data are

written via a serial interface port. The current value of

all 24 channels is set by a single external resistor.

•

Shift Out Data Changes With Falling Edge to

Avoid Data Shift Errors

•

Auto Display Repeat

4-MHz Internal Oscillator

Thermal Shutdown (TSD):

The TLC5947 has a thermal shutdown (TSD) function

that turns off all output drivers during an

over-temperature condition. All of the output drivers

automatically restart when the temperature returns to

normal conditions.

–

Automatic shutdown at over temperature

conditions

–

Restart under normal temperature

V_LED

OUT0

OUT23

SOUT

OUT0

SIN

OUT23

SOUT

DATA

SIN

SCLK

XLAT

BLANK

V_CC

Controller

XLAT

TLC5947

ICn

XLAT

BLANK

IC1

VCC

GND

VCC

GND

BLANK

IREF

R_IREF

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, Inc.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...29

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TLC5947DAPR	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with
TLC5947DAPRG4	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with Internal Oscillator
TLC5947RHB	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with
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TLC5947RHBRG4	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with Internal Oscillator
TLC5947RHBT	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with Internal Oscillator
TLC5947RHBTG4	TI	获取价格	24-Channel, 12-Bit PWM LED Driver with Internal Oscillator
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