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User's Guide

SLVU756–August 2012

Using the TLC5929, 16-Channel LED Driver with 7-Bit

Global Brightness Control, Power-Save Mode, and Full

Self-Diagnosis for LEDs

The Texas Instruments TLC5929 evaluation module (EVM) is a fully assembled and tested circuit for

evaluating the TLC5929, a 16-channel, constant-current LED driver with 7-Bit Global Brightness Control,

Power-Save Mode, and Full Self-Diagnosis for LEDs. The EVM is capable of driving up to 50 mA per

channel when powered from a 5-V supply.

Contents

1 Introduction .................................................................................................................. 2

1.1 Description .......................................................................................................... 2

1.2 Applications ......................................................................................................... 2

1.3 Features ............................................................................................................. 2

2 TLC5929 EVM Electrical Performance Specifications ................................................................. 2

3 TLC5929 EVM Schematic ................................................................................................. 3

4 Connector and Test Point Descriptions .................................................................................. 4

4.1 Connectors .......................................................................................................... 4

4.2 I

REF

Jumpers (J7) ................................................................................................... 5

4.3 Test Point Descriptions ............................................................................................ 5

5 Test Set Up .................................................................................................................. 6

5.1 Equipment ........................................................................................................... 6

5.2 Equipment Setup ................................................................................................... 6

6 TLC5929 EVM Assembly Drawings and Layout ........................................................................ 8

7 List of Materials ............................................................................................................. 9

List of Figures

1 TLC5929 EVM Schematic ................................................................................................. 3

2 TLC5929 EVM Recommended Test Set-Up ............................................................................ 7

3 TLC5929 EVM Component Placement (Viewed From Top) .......................................................... 8

4 TLC5929 EVM Top Copper (Viewed From Top)........................................................................ 8

5 TLC5929 EVM Bottom Copper (Viewed From Bottom)................................................................ 9

List of Tables

1 TLC5929 EVM Electrical and Performance Specifications ............................................................ 2

2 Connector Description...................................................................................................... 4

3 Test Point Description ...................................................................................................... 5

4 Bill of Materials .............................................................................................................. 9

SLVU756–August 2012 Using the TLC5929, 16-Channel LED Driver with 7-Bit Global Brightness

Control, Power-Save Mode, and Full Self-Diagnosis for LEDs

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Summary of content (18 pages)

PAGE 1
User's Guide SLVU756 – August 2012 Using the TLC5929, 16-Channel LED Driver with 7-Bit Global Brightness Control, Power-Save Mode, and Full Self-Diagnosis for LEDs The Texas Instruments TLC5929 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TLC5929, a 16-channel, constant-current LED driver with 7-Bit Global Brightness Control, Power-Save Mode, and Full Self-Diagnosis for LEDs. The EVM is capable of driving up to 50 mA per channel when powered from a 5-V supply.
PAGE 2
Introduction 1 Introduction 1.1 Description www.ti.com The evaluation board is powered with external power supplies. An external device capable of providing clock, data, latch, and blank signals also controls the EVM. This is done with an SPI-compatible serial interface on a microcontroller or through a function generator. Connect different LEDs to the evaluation board through the output connector. 1.2 Applications • • • 1.
PAGE 3
TLC5929 EVM Schematic www.ti.com 3 TLC5929 EVM Schematic NOTE: For Reference Only, See Table 4 for Specific Values Figure 1.
PAGE 4
Connector and Test Point Descriptions www.ti.com 4 Connector and Test Point Descriptions 4.1 Connectors Table 2. Connector Description 4.1.
PAGE 5
Connector and Test Point Descriptions www.ti.com 4.2 IREF Jumpers (J7) The 2 × 5 header, J7, selects the desired maximum output current. The currents available for the TLC5929 are 10, 20, 30, 40, and 50 mA per channel. NOTE: The LEDs connected to J3 do not turn on if there is no jumper set at J7. RIREF = VIREF ´ 54.8 IOLCMax (1) Where: VIREF = the internal reference voltage on the IREF pin (typically 1.205 V) IOLCMax = 1 mA to 40 mA for VCC ≤ 3.6 V, or 1 mA to 50 mA for VCC > 3.6 V with BC = 7Fh 4.
PAGE 6
Test Set Up www.ti.com 5 Test Set Up 5.1 Equipment 5.1.1 Voltage Source VCC supply (TLC5929 Driver): 3–5.5 V at 50 mA. VLED supply: 5 V at more than 16 times the set output current, IREF CAUTION Do not operate without LED loads. The TLC5929 outputs are bipolar and can draw high ICC current when no load is connected. In addition the fault protection will be triggered. Connect VCC to J6 and VLED to J5 as shown in Figure 2. 5.1.
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Test Set Up www.ti.com 5.2.2 Diagram Signal Pattern Generator (FPGA, CPLD, MCU, Equipment) LED Driver Power Supply e.g. 3.3V or 5V VOH: e.g. 3.3V or 5V VOL: GND 16x LED Power Supply e.g. 5V Figure 2.
PAGE 8
TLC5929 EVM Assembly Drawings and Layout 6 www.ti.com TLC5929 EVM Assembly Drawings and Layout Figure 3 through Figure 5 show the design of the TLC5929 EVM printed circuit board. The EVM has been designed using a 2-Layer, 1-oz copper-clad circuit board, 6.1 cm x 5.3 cm, with all components on the top side and all active traces to the top and bottom layers. This allows viewing, probing, and evaluation of the TLC5929 LED control IC in a practical double-sided application.
PAGE 9
List of Materials www.ti.com Figure 5. TLC5929 EVM Bottom Copper (Viewed From Bottom) 7 List of Materials Table 4 lists the EVM components as configured according to the schematic shown in Figure 1. Table 4.
PAGE 10
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
PAGE 11
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
PAGE 12
【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
PAGE 13
EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
PAGE 14
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
PAGE 15
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
PAGE 16
【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
PAGE 17
EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
PAGE 18
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.