Datasheet TLC5940 (Texas Instruments)
| Manufacturer | Texas Instruments |
| Description | 16-channel LED driver w/EEprom dot correction & grayscale PWM control |
| Pages / Page | 40 / 1 — TLC5940. TLC5940 16-Channel LED Driver With DOT Correction and Grayscale … |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
TLC5940. TLC5940 16-Channel LED Driver With DOT Correction and Grayscale PWM Control. 1 Features. 3 Description
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TLC5940
SLVS515D – DECEMBER 2004 – REVISED NOVEMBER 2015
TLC5940 16-Channel LED Driver With DOT Correction and Grayscale PWM Control 1 Features 3 Description
The TLC5940 is a 16-channel, constant-current sink • 16 Channels 1 LED driver. Each channel has an individually • 12 bit (4096 Steps) Grayscale PWM Control adjustable 4096-step grayscale PWM brightness • Dot Correction control and a 64-step, constant-current sink (dot – 6 bit (64 Steps) correction). The dot correction adjusts the brightness variations between LED channels and other LED – Storable in Integrated EEPROM drivers. The dot correction data is stored in an • Drive Capability (Constant-Current Sink) integrated EEPROM. Both grayscale control and dot – 0 mA to 60 mA (V correction are accessible through a serial interface. A CC < 3.6 V) single external resistor sets the maximum current – 0 mA to 120 mA (VCC > 3.6 V) value of all 16 channels. • LED Power Supply Voltage up to 17 V The TLC5940 features two error information circuits. • VCC = 3 V to 5.5 V The LED open detection (LOD) indicates a broken or • Serial Data Interface disconnected LED at an output terminal. The thermal • Controlled In-Rush Current error flag (TEF) indicates an overtemperature condition. • 30 MHz Data Transfer Rate • CMOS Level I/O
Device Information(1)
• Error Information
PART NUMBER PACKAGE BODY SIZE (NOM)
– LOD: LED Open Detection PDIP (28) 35.69 mm × 6.73 mm – TEF: Thermal Error Flag TLC5940 HTSSOP (28) 9.70 mm × 4.40 mm VQFN (32) 5.00 mm × 5.00 mm
2 Applications
(1) For all available packages, see the orderable addendum at • Monocolor, Multicolor, Full-Color LED Displays the end of the datasheet. • LED Signboards • Display Backlighting • General, High-Current LED Drive
Block Diagram
VCC GND SCLK SIN XLAT DCPRG CNT VPRG 1 0 Constant Current 12−Bit Grayscale V GS Register Driver OUT0 IREF REF =1.24 V Max. OUTn VPRG 0 11 PWM Control Delay Current 0 DCPRG 1 x0 1 0 DC Register 6−Bit Dot 0 5 0 Correction GSCLK BLANK GS Counter CNT 0 DC EEPROM 5 LED Open Detection Input VPRG Shift Register CNT 0 96 Status Constant Current Information: 192 192 12−Bit Grayscale GS Register Driver OUT1 LOD, PWM Control 12 23 TED, DCPRG 96 Delay DC DATA 1 x1 191 95 96 DC Register 6−Bit Dot 1 0 6 11 0 Correction VPRG 6 DC EEPROM11 LED Open Detection LED Open 96 VPRG Detection (LOD) Temperature CNT Blank Error Flag (TEF) 1 0 Input Constant Current Shift 12−Bit Grayscale GS Register Driver OUT15 Register 180 191 PWM Control Delay DCPRG x15 1 XERR 6−Bit Dot DC Register 90 95 0 Correction 191 DC EEPROM LED Open Detection 90 95 SOUT VPRG 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. Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Switching Characteristics 6.7 Typical Characteristics 7 Parameter Measurement Information 7.1 Test Parameter Equations 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Serial Interface 8.3.2 Error Information Output 8.3.3 TEF: Thermal Error Flag 8.3.4 LOD: LED Open Detection 8.3.5 Delay Between Outputs 8.3.6 Output Enable 8.3.7 Setting Maximum Channel Current 8.4 Device Functional Modes 8.4.1 Operating Modes 8.4.2 Setting DOT Correction 8.4.3 Setting Grayscale 8.4.4 Status Information Output 8.4.5 Grayscale PWM Operation 9 Application and Implementation 9.1 Application Information 9.2 Typical Application 9.2.1 Design Requirements 9.2.2 Detailed Design Procedure 9.2.2.1 Serial Data Transfer Rate 9.2.2.2 Grayscale (GS) Data 9.2.3 Application Curve 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 11.3 Power Dissipation Calculation 12 Device and Documentation Support 12.1 Community Resources 12.2 Trademarks 12.3 Electrostatic Discharge Caution 12.4 Glossary 13 Mechanical, Packaging, and Orderable Information
TLC5940
SLVS515D – DECEMBER 2004 – REVISED NOVEMBER 2015
TLC5940 16-Channel LED Driver With DOT Correction and Grayscale PWM Control 1 Features 3 Description
The TLC5940 is a 16-channel, constant-current sink • 16 Channels 1 LED driver. Each channel has an individually • 12 bit (4096 Steps) Grayscale PWM Control adjustable 4096-step grayscale PWM brightness • Dot Correction control and a 64-step, constant-current sink (dot – 6 bit (64 Steps) correction). The dot correction adjusts the brightness variations between LED channels and other LED – Storable in Integrated EEPROM drivers. The dot correction data is stored in an • Drive Capability (Constant-Current Sink) integrated EEPROM. Both grayscale control and dot – 0 mA to 60 mA (V correction are accessible through a serial interface. A CC < 3.6 V) single external resistor sets the maximum current – 0 mA to 120 mA (VCC > 3.6 V) value of all 16 channels. • LED Power Supply Voltage up to 17 V The TLC5940 features two error information circuits. • VCC = 3 V to 5.5 V The LED open detection (LOD) indicates a broken or • Serial Data Interface disconnected LED at an output terminal. The thermal • Controlled In-Rush Current error flag (TEF) indicates an overtemperature condition. • 30 MHz Data Transfer Rate • CMOS Level I/O
Device Information(1)
• Error Information
PART NUMBER PACKAGE BODY SIZE (NOM)
– LOD: LED Open Detection PDIP (28) 35.69 mm × 6.73 mm – TEF: Thermal Error Flag TLC5940 HTSSOP (28) 9.70 mm × 4.40 mm VQFN (32) 5.00 mm × 5.00 mm
2 Applications
(1) For all available packages, see the orderable addendum at • Monocolor, Multicolor, Full-Color LED Displays the end of the datasheet. • LED Signboards • Display Backlighting • General, High-Current LED Drive
Block Diagram
VCC GND SCLK SIN XLAT DCPRG CNT VPRG 1 0 Constant Current 12−Bit Grayscale V GS Register Driver OUT0 IREF REF =1.24 V Max. OUTn VPRG 0 11 PWM Control Delay Current 0 DCPRG 1 x0 1 0 DC Register 6−Bit Dot 0 5 0 Correction GSCLK BLANK GS Counter CNT 0 DC EEPROM 5 LED Open Detection Input VPRG Shift Register CNT 0 96 Status Constant Current Information: 192 192 12−Bit Grayscale GS Register Driver OUT1 LOD, PWM Control 12 23 TED, DCPRG 96 Delay DC DATA 1 x1 191 95 96 DC Register 6−Bit Dot 1 0 6 11 0 Correction VPRG 6 DC EEPROM11 LED Open Detection LED Open 96 VPRG Detection (LOD) Temperature CNT Blank Error Flag (TEF) 1 0 Input Constant Current Shift 12−Bit Grayscale GS Register Driver OUT15 Register 180 191 PWM Control Delay DCPRG x15 1 XERR 6−Bit Dot DC Register 90 95 0 Correction 191 DC EEPROM LED Open Detection 90 95 SOUT VPRG 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. Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Switching Characteristics 6.7 Typical Characteristics 7 Parameter Measurement Information 7.1 Test Parameter Equations 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Serial Interface 8.3.2 Error Information Output 8.3.3 TEF: Thermal Error Flag 8.3.4 LOD: LED Open Detection 8.3.5 Delay Between Outputs 8.3.6 Output Enable 8.3.7 Setting Maximum Channel Current 8.4 Device Functional Modes 8.4.1 Operating Modes 8.4.2 Setting DOT Correction 8.4.3 Setting Grayscale 8.4.4 Status Information Output 8.4.5 Grayscale PWM Operation 9 Application and Implementation 9.1 Application Information 9.2 Typical Application 9.2.1 Design Requirements 9.2.2 Detailed Design Procedure 9.2.2.1 Serial Data Transfer Rate 9.2.2.2 Grayscale (GS) Data 9.2.3 Application Curve 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 11.3 Power Dissipation Calculation 12 Device and Documentation Support 12.1 Community Resources 12.2 Trademarks 12.3 Electrostatic Discharge Caution 12.4 Glossary 13 Mechanical, Packaging, and Orderable Information