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TLC5947 Datasheet PDF

Part Number TLC5947
Description 24-Channel 12-Bit PWM LED Driver
Manufacture etcTI
Total Page 30 Pages
PDF Download Download TLC5947 Datasheet PDF

Features: Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5947 SBVS114B – JULY 20 08 – REVISED JANUARY 2015 TLC5947 24- Channel, 12-Bit PWM LED Driver With Int ernal Oscillator 1 Features •1 24 Ch annels, Constant-Current Sink Output 30-mA Capability (Constant-Current Si nk) • 12-Bit (4096 Steps) PWM Graysca le Control • LED Power-Supply Voltage Up to 30 V • VCC = 3.0 V to 5.5 V Constant-Current Accuracy: – Channe l-to-Channel = ±2% (Typical) – Devic e-to-Device = ±2% (Typical) • CMOS L ogic Level I/O • 30-MHz Data Transfer Rate (Standalone) • 15-MHz Data Tran sfer Rate (Cascaded Devices, SCLK Duty = 50%) • Shift Out Data Changes With Falling Edge to Avoid Data Shift Errors • Auto Display Repeat • 4-MHz Inte rnal Oscillator • Thermal Shutdown (T SD): – Automatic Shutdown at OverTemp erature Conditions – Restart Under No rmal Temperature • Noise Reduction: 4-Channel Grouped Delay to Prevent Inrush Current • Operating Temperature: –40°C to 85°C 2 Applications.

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TLC5947 datasheet
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TLC5947
SBVS114B – JULY 2008 – REVISED JANUARY 2015
TLC5947 24-Channel, 12-Bit PWM LED Driver With Internal Oscillator
1 Features
1 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
• VCC = 3.0 V to 5.5 V
• Constant-Current Accuracy:
– Channel-to-Channel = ±2% (Typical)
– Device-to-Device = ±2% (Typical)
• CMOS Logic Level I/O
• 30-MHz Data Transfer Rate (Standalone)
• 15-MHz Data Transfer Rate (Cascaded Devices,
SCLK Duty = 50%)
• Shift Out Data Changes With Falling Edge to
Avoid Data Shift Errors
• Auto Display Repeat
• 4-MHz Internal Oscillator
• Thermal Shutdown (TSD):
– Automatic Shutdown at OverTemperature
Conditions
– Restart Under Normal Temperature
• Noise Reduction:
– 4-Channel Grouped Delay to Prevent Inrush
Current
• Operating Temperature: –40°C to 85°C
2 Applications
• Static LED Displays
• Message Boards
• Amusement Illumination
• TV Backlighting
3 Description
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.
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.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
TLC5947
HTSSOP (32)
VQFN (32)
11.00 mm × 6.20 mm
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Application Circuit
VLED
VLED
VLED
VLED
¼¼
¼
Controller
DATA
SCLK
XLAT
BLANK
¼¼
¼¼
¼OUT0
OUT23
SIN SOUT
SCLK
XLAT TLC5947
IC1
BLANK
VCC
VCC
¼
¼
¼OUT0
OUT23
SIN SOUT
SCLK
XLAT TLC5947
BLANK ICn
VCC
VCC
RIREF
IREF
GND
RIREF
IREF
GND
3
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TLC5947 datasheet
TLC5947
SBVS114B – JULY 2008 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Dissipation Ratings ................................................... 5
6.6 Electrical Characteristics........................................... 6
6.7 Switching Characteristics .......................................... 7
6.8 Typical Characteristics .............................................. 9
7 Parameter Measurement Information ................ 11
7.1 Pin Equivalent Input and Output Schematic
Diagrams.................................................................. 11
7.2 Test Circuits ............................................................ 11
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 12
8.4 Programming........................................................... 15
9 Application and Implementation ........................ 18
9.1 Application Information............................................ 18
9.2 Typical Application ................................................. 18
10 Power Supply Recommendations ..................... 20
11 Layout................................................................... 20
11.1 Layout Guidelines ................................................. 20
11.2 Layout Example .................................................... 20
11.3 Power Dissipation ................................................. 21
12 Device and Documentation Support ................. 22
12.1 Trademarks ........................................................... 22
12.2 Electrostatic Discharge Caution ............................ 22
12.3 Glossary ................................................................ 22
13 Mechanical, Packaging, and Orderable
Information ........................................................... 22
4 Revision History
Changes from Revision A (September 2008) to Revision B
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2 Submit Documentation Feedback
Product Folder Links: TLC5947
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