(PDF) TLC5957 Datasheet PDF | etcTI





TLC5957 Datasheet PDF

Part Number TLC5957
Description 48-Channel 16-Bit ES-PWM LED Driver
Manufacture etcTI
Total Page 26 Pages
PDF Download Download TLC5957 Datasheet PDF

Features: Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5957 SLVSCQ4 – OCTOBER 2014 TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPE N Detection and Caterpillar Cancelling 1 Features •1 48 Constant-Current Si nk Output Channels • Sink Current Cap ability with Max BC/CC data – 1~20mA (VCC = 3.3V) – 1~25mA (VCC = 5V) • Global Brightness Control (BC): 3-Bit ( 8 Step) • Global Brightness Control ( CC) for Each Color Group: 9-Bit (512 St ep), Three Groups • LED Power Supply Voltage up to 10V • VCC = 3.0 to 5.5V • Knee Voltage Vout = 0.24V at 10mA • Constant Current Accuracy – Chann el to Channel = ±1%(Typ), ±3%(Max) Device to Device = ±1%(Typ), ±2%(Ma x) • Data Transfer Rate : 33MHz • G rayscale Control Clock : 33MHz • Pre- charge FET for Ghost Cancelling • Enh anced Circuit for Caterpillar Cancellin g • Selectable Data Transfer Bit and PWM Bit (9 bit to 16 bit) • Selectable Traditional PWM and ES-PWM • LED Open Detection (LOD) • Thermal .

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TLC5957 datasheet
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TLC5957
SLVSCQ4 – OCTOBER 2014
TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET,
LED OPEN Detection and Caterpillar Cancelling
1 Features
1 48 Constant-Current Sink Output Channels
• Sink Current Capability with Max BC/CC data
– 1~20mA (VCC = 3.3V)
– 1~25mA (VCC = 5V)
• Global Brightness Control (BC): 3-Bit (8 Step)
• Global Brightness Control (CC) for Each Color
Group: 9-Bit (512 Step), Three Groups
• LED Power Supply Voltage up to 10V
• VCC = 3.0 to 5.5V
• Knee Voltage Vout = 0.24V at 10mA
• Constant Current Accuracy
– Channel to Channel = ±1%(Typ), ±3%(Max)
– Device to Device = ±1%(Typ), ±2%(Max)
• Data Transfer Rate : 33MHz
• Grayscale Control Clock : 33MHz
• Pre-charge FET for Ghost Cancelling
• Enhanced Circuit for Caterpillar Cancelling
• Selectable Data Transfer Bit and PWM Bit (9 bit to
16 bit)
• Selectable Traditional PWM and ES-PWM
• LED Open Detection (LOD)
• Thermal Shut Down (TSD)
• Auto Display Repeat/Auto Data Refresh
• Delay Switching to Prevent Inrush Current
• Operating Temperature : –40°C to +85°C
2 Applications
• LED Video Displays
• LED Signboards
3 Description
The TLC5957 is a 48-channel constant current sink
driver. Each channel has an individually-adjustable,
65536-step, pulse width modulation (PWM) grayscale
(GS) brightness control.
The output channels are divided into three groups,
each group has a 512 step color brightness control
(CC), CC adjusts brightness between colors. The
maximum current value of all 48 channels can be set
by 8-step global brightness control (BC). BC adjusts
brightness deviation between LED drivers. GS, CC
and BC data are accessible via a serial interface port.
TLC5957 has one error flag: LED open detection
(LOD), which can be read via a serial interface port.
Each constant-current has a pre-charge field- effect
transistor (FET), which can remove ghosting and
improve display performance on the multiplexing LED
display. Besides, TLC5957 has an enhanced circuit, it
can cancel the caterpillar effect caused by LED open.
TLC5957 has a poker data transmission mode; GS
data length can be configured from 9 bit to 16 bit
according to PWM bits in each sub-segment. Poker
Mode can significantly increase visual refresh rate in
multiplexing applications.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TLC5957
QFN (56)
8.0 mm × 8.0 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Circuit (Multiple Daisy Chained TLC5957s)
VLED
SW
COM n
COM n
VLED
SW
COM 1
VLED
SW
COM 0
X 48
COM 1
COM 0
X 48
Controller
DATA
SCLK
LAT
GCLK
FLAGS
READ
OUTR0
OUTB15
SIN
SCLK
LAT
TLC5957
IC1
GCLK
IREF
IREFGND
SOUT
VCC
Thermal
Pad
VCC
GND
GND
3
OUTR0
OUTB15
SIN
SCLK
TLC5957
LAT ICn
GCLK
IREF
IREFGND
SOUT
VCC
Thermal
Pad
VCC
GND
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.

TLC5957 datasheet
TLC5957
SLVSCQ4 – OCTOBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Typical Application Circuit (Multiple Daisy
Chained TLC5957s)................................................ 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 Handling Ratings ...................................................... 4
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information ................................................. 5
7.5 Electrical Characteristics........................................... 5
7.6 Timing Requirements ............................................... 7
7.7 Typical Characteristics .............................................. 8
8 Parameter Measurement Information ................ 10
8.1 Pin Equivalent Input and Output Schematic
Diagrams.................................................................. 10
8.2 Test Circuit .............................................................. 10
9 Detailed Description ............................................ 11
9.1 Overview ................................................................. 11
9.2 Functional Block Diagram ....................................... 12
9.3 Device Functional Modes........................................ 13
10 Application and Implementation........................ 17
10.1 Application Information.......................................... 17
11 Power Supply Recommendations ..................... 17
12 Layout................................................................... 17
12.1 Layout Guidelines ................................................. 17
12.2 Layout Example .................................................... 18
13 Device and Documentation Support ................. 18
13.1 Related Links ........................................................ 18
13.2 Trademarks ........................................................... 18
13.3 Electrostatic Discharge Caution ............................ 18
13.4 Glossary ................................................................ 18
14 Mechanical, Packaging, and Orderable
Information ........................................................... 18
5 Revision History
DATE
October 2014
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated




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