Driver. TLC5973 Datasheet

TLC5973 Datasheet PDF


Part

TLC5973

Description

3-Channel 12-Bit PWM Constant-Current LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC5973 Datasheet PDF


TLC5973 Datasheet
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
TLC5973
SBVS225B – MARCH 2013 – REVISED MAY 2014
TLC5973 3-Channel, 12-Bit, PWM Constant-Current LED Driver
with Single-Wire Interface (EasySet™)
1 Features
1 Three Constant Sink Current Channels
• Current Capability:
– 2 mA to 35 mA per Channel (VCC 4.0 V)
– 2 mA to 50 mA per Channel (VCC > 4.0 V)
• Grayscale (GS) Control with PWM:
– 12-Bit (4096 Steps)
• Single-Wire Interface (EasySet)
• Power-Supply (VCC) Voltage Range:
– 3 V to 6 V
• OUT Pins Maximum Voltage: Up to 21 V
• Integrated Shunt Regulator
• Data Transfer Maximum Rate:
– Bits per Second (bps): 3 Mbps
• Internal GS Clock Oscillator: 12 MHz (typ)
• Display Repeat Rate: 2.9 kHz (typ)
• Output Delay Switching to Prevent Inrush Current
• Unlimited Device Cascading
• Operating Temperature: –40°C to 85°C
2 Applications
This device is targeted towards one application.
The primary application for this device is for RGB
LED cluster lamp displays.
3 Description
The TLC5973 is an easy-to-use, 3-channel, 50-mA
constant sink current LED driver. The single-wire,
3-Mbps serial interface (EasySet) provides a solution
for minimizing wiring cost. The LED driver provides
12-bit pulse width modulation (PWM) resolution. The
display repeat rate is achieved at 2.9 kHz (typ) with
an integrated 12-MHz grayscale (GS) clock oscillator.
The driver also provides unlimited cascading
capability.
All output sink constant currents can be set by an
external resistor. The TLC5973 has an internal shunt
regulator that can be used for higher VCC power-
supply voltage applications.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
TLC5973
SOIC (8)
4.9 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
space
space
Typical Application Circuit Example
Power
Supply
(5 V)
VCC
GND
Controller
RIREF
GND
IREF
Device
SDI
VCC
OUT0
OUT1
OUT2
SDO
RIREF
GND
IREF
Device
SDI
VCC
OUT0
OUT1
OUT2
SDO
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.

TLC5973 Datasheet
TLC5973
SBVS225B – MARCH 2013 – REVISED MAY 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......................................................... 3
6.1 Absolute Maximum Ratings ..................................... 3
6.2 Handling Ratings....................................................... 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Switching Characteristics .......................................... 6
6.7 Typical Characteristics .............................................. 6
7 Parameter Measurement Information .................. 7
7.1 Pin-Equivalent Input and Output Schematic
Diagrams.................................................................... 7
7.2 Test Circuits .............................................................. 7
7.3 Timing Diagrams ....................................................... 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 13
8.5 Programming........................................................... 19
8.6 Register Maps ......................................................... 21
9 Applications and Implementation ...................... 22
9.1 Application Information............................................ 22
9.2 Typical Applications ................................................ 22
10 Power Supply Recommendations ..................... 28
11 Layout................................................................... 28
11.1 Layout Guidelines ................................................. 28
11.2 Layout Example .................................................... 28
12 Device and Documentation Support ................. 29
12.1 Trademarks ........................................................... 29
12.2 Electrostatic Discharge Caution ............................ 29
12.3 Glossary ................................................................ 29
13 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
Changes from Revision A (May 2013) to Revision B
Page
• Changed format to meet latest data sheet standards; added Applications and Implementation, Power Supply
Recommendations, and Layout sections, moved existing sections ....................................................................................... 1
• Changed 8-bit pulse width modulation to 12-bit pulse width modulation in Description section ........................................... 1
• Changed tH0 and tH1 parameter units from µs to ns in Recommended Operating Conditions table ..................................... 4
• Changed Figure 8: deleted top SDO, changed bottom SDO to OUTn ................................................................................. 7
• Changed Figure 11: deleted extraneous breaks in traces, extraneous data call-outs, and tH1 on GSLAT trace,
changed data transfer trace note to Internal to 1st Device and 1st Data to 47th Data in 48-Bit Shift Register LSB trace.... 9
• Changed functional block diagram: changed Upper 8 Bits to Upper 12 Bits on 48-Bit Shift Register block ....................... 11
• Added Grayscale (GS) Control, EasySet and Shunt Regulator, and No Limit Cascading sections .................................... 11
• Changed Connector Design title .......................................................................................................................................... 13
• Changed Figure 13: changed OUTn traces GSDATA = 4093 and GSDATA = 4094 ......................................................... 15
• Changed description of the Data ‘0’ and Data ‘1’ Write Sequence (Data Write Sequence) section ................................... 16
• Changed title of Controlling Devices Connected in Series section ...................................................................................... 19
• Changed Data 101 to Data 1010 in Figure 18 .................................................................................................................... 19
• Changed eight MSBs to 12 MSBs in third sentence of the Register and Data Latch Configuration section ....................... 21
• Changed Figure 21: corrected 3AAh bit set sequence ........................................................................................................ 21
• Changed Figure 26: changed number of LEDs in optional dashed box .............................................................................. 26
• Changed Table 7: changed all values in RVCC column and first and last values in Resistor Wattage column .................... 27
Changes from Original (March 2013) to Revision A
Page
• Changed second paragraph of Grayscale (GS) Function (PWM Control) section............................................................... 13
• Changed tCYCLE setting range in Data Transfer Rate (tCYCLE) Measurement Sequence section .......................................... 16
• Updated Figure 18................................................................................................................................................................ 19
• Updated Figure 21 and Table 3............................................................................................................................................ 21
2 Submit Documentation Feedback
Product Folder Links: TLC5973
Copyright © 2013–2014, Texas Instruments Incorporated


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TLC5973 SBVS225B – MARCH 2013 – REVISED MAY 2014 TLC5973 3-Channel , 12-Bit, PWM Constant-Current LED Driv er with Single-Wire Interface (EasySet ) 1 Features •1 Three Constant Sin k Current Channels • Current Capabili ty: – 2 mA to 35 mA per Channel (VCC ≤ 4.0 V) – 2 mA to 50 mA per Channe l (VCC > 4.0 V) • Grayscale (GS) Cont rol with PWM: – 12-Bit (4096 Steps) Single-Wire Interface (EasySet) • Power-Supply (VCC) Voltage Range: – 3 V to 6 V • OUT Pins Maximum Voltage: Up to 21 V • Integrated Shunt Regula tor • Data Transfer Maximum Rate: – Bits per Second (bps): 3 Mbps • Inte rnal GS Clock Oscillator: 12 MHz (typ) • Display Repeat Rate: 2.9 kHz (typ) • Output Delay Switching to Prevent I nrush Current • Unlimited Device Casc ading • Operating Temperature: –40 C to 85°C 2 Applications This device is targeted towards one application. The primary application for this device is for RGB LED cluster lamp displ.
Keywords TLC5973, datasheet, pdf, etcTI, 3-Channel, 12-Bit, PWM, Constant-Current, LED, Driver, LC5973, C5973, 5973, TLC597, TLC59, TLC5, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)