(PDF) TLC5955 Datasheet PDF | etcTI





TLC5955 Datasheet PDF

Part Number TLC5955
Description 48-Channel 16-Bit PWM LED Driver
Manufacture etcTI
Total Page 30 Pages
PDF Download Download TLC5955 Datasheet PDF

Features: Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5955 SBVS237 – MARCH 20 14 TLC5955 48-Channel, 16-Bit, PWM LED Driver with DC, BC, LED Open-Short Dete ction, and Internal Current Setting 1 Features •1 48 Constant-Current Sink Output Channels • Sink Current Capabi lity with Maximum MC, DC, and BC Data: – 23.9 mA (VCC ≤ 3.6 V, MC = 5) – 31.9 mA (VCC > 3.6 V, MC = 7) • Gray scale (GS) Control: – 16-Bit (65,536 Steps) with Enhanced Spectrum or Conven tional PWM • Maximum Current (MC) Con trol: – 3 Bits (8 Steps) with a 3-mA to 30-mA Range – 3 MC Sets for Each C olor Group • Dot Correction (DC) Cont rol: – 7 Bits (128 Steps) with a 26.2 % to 100% Range • Global Brightness C ontrol (BC): – 7 Bits (128 Steps) wit h a 10% to 100% Range – 3 BC Sets for Each Color Group • LED Power-Supply Voltage: Up to 10 V • VCC: 3.0 V to 5 .5 V • Constant-Current Accuracy: – Channel-to-Channel: ±2% (typ), ±5% (max) – Device-to-Device: ±2% (typ), ±4% (max) • Data Transfer Rate.

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TLC5955 datasheet
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TLC5955
SBVS237 – MARCH 2014
TLC5955 48-Channel, 16-Bit, PWM LED Driver with DC, BC, LED Open-Short Detection,
and Internal Current Setting
1 Features
1 48 Constant-Current Sink Output Channels
• Sink Current Capability with Maximum MC, DC,
and BC Data:
– 23.9 mA (VCC 3.6 V, MC = 5)
– 31.9 mA (VCC > 3.6 V, MC = 7)
• Grayscale (GS) Control:
– 16-Bit (65,536 Steps) with Enhanced Spectrum
or Conventional PWM
• Maximum Current (MC) Control:
– 3 Bits (8 Steps) with a 3-mA to 30-mA Range
– 3 MC Sets for Each Color Group
• Dot Correction (DC) Control:
– 7 Bits (128 Steps) with a 26.2% to 100%
Range
• Global Brightness Control (BC):
– 7 Bits (128 Steps) with a 10% to 100% Range
– 3 BC Sets for Each Color Group
• LED Power-Supply Voltage: Up to 10 V
• VCC: 3.0 V to 5.5 V
• Constant-Current Accuracy:
– Channel-to-Channel: ±2% (typ), ±5% (max)
– Device-to-Device: ±2% (typ), ±4% (max)
• Data Transfer Rate: 25 MHz
• Grayscale Control Clock: 33 MHz
• Auto Display Repeat
• Display Timing Reset
• Auto Data Refresh (GS and DC Only)
• LED Open Detection (LOD)
• LED Short Detection (LSD)
• UVLO Sets Default Data
• Delay Switching to Prevent Inrush Current
• Operating Temperature: –40°C to +85°C
2 Applications
• LED Video Displays
• Variable Message Signs (VMS)
• Illumination
3 Description
The TLC5955 is a 48-channel, constant-current sink
driver. Each channel has an individually-adjustable,
pulse width modulation (PWM), grayscale (GS)
brightness control with 65,536 steps and 128 steps of
constant-current dot correction (DC). DC adjusts
brightness deviation between channels. All channels
have a 128-step global brightness control (BC). BC
adjusts brightness deviation between the R, G, B
color group. The eight-step maximum current control
(MC) selects the maximum output current range for
all channels of each color group. GS, DC, BC, and
MC data are accessible with a serial interface port.
The TLC5955 has two error flags: LED open
detection (LOD) and LED short detection (LSD). The
error detection results can be read with a serial
interface port.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
TLC5955DCA
HTSSOP (56)
14,0 mm × 6,1 mm
TLC5955RTQ
QFN (56)
8,0 mm × 8,0 mm
VLED
+
GND
Input Serial Data
Shift Clock
Data Latch
GS Clock
Application Circuit
x48
OUTR0
SIN
SCLK
LAT
GSCLK
OUTB15
SOUT
TLC5955
VCC
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.

TLC5955 datasheet
TLC5955
SBVS237 – MARCH 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Terminal Configurations and Functions.............. 3
6 Specifications......................................................... 6
6.1 Absolute Maximum Ratings ..................................... 6
6.2 Handling Ratings....................................................... 6
6.3 Recommended Operating Conditions....................... 7
6.4 Thermal Information .................................................. 7
6.5 Electrical Characteristics........................................... 8
6.6 Switching Characteristics .......................................... 9
6.7 Typical Characteristics ............................................ 10
7 Parameter Measurement Information ................ 12
7.1 Terminal-Equivalent Input and Output Schematic
Diagrams.................................................................. 12
7.2 Test Circuits ............................................................ 12
7.3 Timing Diagrams ..................................................... 13
8 Detailed Description ............................................ 15
8.1 Overview ................................................................. 15
8.2 Functional Block Diagram ....................................... 16
8.3 Feature Description................................................. 17
8.4 Device Functional Modes........................................ 28
9 Applications and Implementation ...................... 38
9.1 Application Information............................................ 38
9.2 Typical Application .................................................. 38
10 Power Supply Recommendations ..................... 41
11 Layout................................................................... 41
11.1 Layout Guidelines ................................................. 41
11.2 Layout Example .................................................... 42
12 Device and Documentation Support ................. 43
12.1 Device Support...................................................... 43
12.2 Documentation Support ........................................ 43
12.3 Trademarks ........................................................... 43
12.4 Electrostatic Discharge Caution ............................ 43
12.5 Glossary ................................................................ 43
13 Mechanical, Packaging, and Orderable
Information ........................................................... 43
4 Revision History
DATE
March 2014
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: TLC5955
Copyright © 2014, Texas Instruments Incorporated




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