Driver. TLC5954 Datasheet

TLC5954 Datasheet PDF


Part

TLC5954

Description

48-Channel Constant-Current LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
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TLC5954 Datasheet
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TLC5954
SBVS241 – APRIL 2014
TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control,
LED Open-Short Detection, and Power-Save Mode
1 Features
1 48 Constant-Current Sink Output Channels with
On or Off Control
• Current Capability:
– 34.9 mA for 32 Channels
– 24.4 mA 16 Channels
• No External Resistor for Current Setting
• Maximum Current Control (MC): 3 Bits (8 Steps)
• Global Brightness Control (BC) for Each Color
Group: 7 Bits (128 Steps), Three Groups
• LED Power-Supply Voltage: Up to 10 V
• VCC = 3.0 V to 3.6 V
• Constant-Current Accuracy:
– Channel-to-Channel = ±1% (typ), ±3% (max)
– Device-to-Device = ±2% (typ), ±4% (max)
• Data Transfer Rate: 30 MHz
• BLANK Pulse Duration: 40 ns (min)
• LED Open Detection (LOD)
• LED Short Detection (LSD)
• Power-Save Mode (PSM): 7-µA Consumption,
High-Speed Recovery
• Undervoltage Lockout Sets Default Data
• Delayed Switching Minimizes Inrush Current
• Operating Temperature: –40°C to +85°C
2 Applications
• LED Video Displays
• Variable Message Signs (VMS)
• Illumination
3 Description
The TLC5954 is a 48-channel, constant-current sink
LED driver. Each channel can be turned on or off by
writing data to an internal register. The output
channels (OUTXn) are grouped into three groups of
16 channels. Each channel group (R, G, and B) has a
128-step global brightness control (BC) function. The
maximum current value of all 48 channels can be set
with an 8-step maximum current control (MC)
function. The device has two error flags: LED open
detection (LOD) and LED short detection (LSD). The
error flags can be read via a serial interface port. The
device also has a power-save mode that sets the
total current consumption to 7 µA (typ) when all
outputs are off.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
TLC5954
VQFN (56)
8 mm × 8 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
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Application Circuit
VLED
+ x48
GND
Input Serial Data
Shift Clock
Data Latch
BLANK Signal
OUTR0
OUTB15
SIN SOUT
SCLK
LAT
TLC5954
VCC
BLANK
PowerPAD
GND
GND
Output Serial Data
VCC
GND
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.

TLC5954 Datasheet
TLC5954
SBVS241 – APRIL 2014
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 Handling Ratings....................................................... 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics .......................................... 7
6.7 Typical Characteristics .............................................. 8
7 Parameter Measurement Information ................ 11
7.1 Pin Equivalent Input and Output Schematic
Diagrams.................................................................. 11
7.2 Test Circuits ............................................................ 11
7.3 Timing Diagrams ..................................................... 12
8 Detailed Description ............................................ 16
8.1 Overview ................................................................. 16
8.2 Functional Block Diagram ....................................... 17
8.3 Feature Description ................................................ 18
8.4 Device Functional Modes........................................ 23
8.5 Register Maps ......................................................... 27
9 Applications and Implementation ...................... 33
9.1 Application Information............................................ 33
9.2 Typical Application .................................................. 33
10 Power Supply Recommendations ..................... 36
11 Layout................................................................... 36
11.1 Layout Guidelines ................................................. 36
11.2 Layout Example .................................................... 37
12 Device and Documentation Support ................. 38
12.1 Device Support...................................................... 38
12.2 Documentation Support ........................................ 38
12.3 Trademarks ........................................................... 38
12.4 Electrostatic Discharge Caution ............................ 38
12.5 Glossary ................................................................ 38
13 Mechanical, Packaging, and Orderable
Information ........................................................... 38
4 Revision History
Date
April 2014
Revision
*
Notes
Initial release.
2 Submit Documentation Feedback
Product Folder Links: TLC5954
Copyright © 2014, Texas Instruments Incorporated


Features Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5954 SBVS241 – APRIL 20 14 TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Cont rol, LED Open-Short Detection, and Powe r-Save Mode 1 Features •1 48 Constan t-Current Sink Output Channels with On or Off Control • Current Capability: – 34.9 mA for 32 Channels – 24.4 mA 16 Channels • No External Resistor f or Current Setting • Maximum Current Control (MC): 3 Bits (8 Steps) • Glob al Brightness Control (BC) for Each Col or Group: 7 Bits (128 Steps), Three Gro ups • LED Power-Supply Voltage: Up to 10 V • VCC = 3.0 V to 3.6 V • Cons tant-Current Accuracy: – Channel-to-C hannel = ±1% (typ), ±3% (max) – Dev ice-to-Device = ±2% (typ), ±4% (max) • Data Transfer Rate: 30 MHz • BLAN K Pulse Duration: 40 ns (min) • LED O pen Detection (LOD) • LED Short Detec tion (LSD) • Power-Save Mode (PSM): 7 -µA Consumption, High-Speed Recovery • Undervoltage Lockout Sets Default Data • Delayed Switching Minim.
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