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This user's guide describes the characteristics, operation, and use of the
TLC5941EVM-105 evaluation module (EVM). This EVM is designed to help the user
evaluate and test the various operating modes of the TLC5941. This user's guide
includes setup instructions for the hardware and software, a schematic diagram, a bill
of materials (BOM), and PCB layout drawings for the evaluation module
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Introduction
The Texas Instruments TLC5941 is a 16 channel, constant-current LED driver that is capable of driving
80mA per channel. The IC contains an integrated DOT correction circuitry that adjusts the dc current for
each output channel to compensate for brightness difference between LEDs. It also has integrated PWM
grayscale control to provide individual LED dimming.
This EVM contains three TLC5941 ICs that are connected in series. The three TLC5941 ICs drive 16
red-green-blue light emitting diodes (RGB LEDs). Each TLC5941 drives a separate color. Each TLC5941
has 16 outputs and each output is connected to a different LED. Using the software, the user individually
controls the DOT correction and grayscale values for each color of each LED.
SLVU140 - October 2005
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TLC5941EVM-105 EVM
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User's Guide
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TLC5941EVM-105 EVM
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Summary of Contents for Texas Instruments TLC5941EVM-105
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Page 1: Table Of Contents
Bill of Materials Introduction The Texas Instruments TLC5941 is a 16 channel, constant-current LED driver that is capable of driving 80mA per channel. The IC contains an integrated DOT correction circuitry that adjusts the dc current for each output channel to compensate for brightness difference between LEDs. It also has integrated PWM grayscale control to provide individual LED dimming. -
Page 2: Introduction
EVM except for the host computer and the two dc power supplies. 1.1.1 Software Texas Instruments has provided the software necessary to evaluate this EVM. Check the TLC5941 product folder on the TI website for the latest revision of the software. 1.1.2 Host Computer (PC) Requirements •... -
Page 3: J1 - Interface Connector
Do not actively drive the same signals on J1 and J3 at the same time. As shown on the schematic, these signals from J1 are buffered before reaching the TLC5941 ICs. SLVU140 – October 2005 TLC5941EVM-105 EVM... -
Page 4: J2 - Power Connector
RGB LED. 9, 10 Not connected Table 3. EVM Power Requirements Pin Number Pin Symbol Voltage Range Max Current 3.3V ± 0.1V 1, 2 V_CC > 500mA 7, 8 V_GB 4.0V – 17V > 2000mA TLC5941EVM-105 EVM SLVU140 – October 2005... -
Page 5: Jumper Descriptions
Data Input Modes The TLC5941EVM-105 can be configured to accept data in two different modes: serially or in parallel. The default configuration is serial mode. The EVM can be reconfigured for parallel data input by modifying resistors R2, R3, R4, R6, R7, and R8 according to Table 5. -
Page 6: Evm Operation
This circuitry is not necessary for operation of the TLC5941 IC. It was added to the EVM to eliminate problems that could be caused by noisy drive signals in a test setup. Board Layout This chapter provides the TLC5941EVM-105 board layout. TLC5941EVM-105 EVM SLVU140 – October 2005... -
Page 7: Assembly Layer
Board Layout Layout Figure 2. Assembly Layer SLVU140 – October 2005 TLC5941EVM-105 EVM... -
Page 8: Top Layer Routing
Board Layout Figure 3. Top Layer Routing TLC5941EVM-105 EVM SLVU140 – October 2005... -
Page 9: Layer 2 Routing
Board Layout Figure 4. Layer 2 Routing SLVU140 – October 2005 TLC5941EVM-105 EVM... -
Page 10: Layer 3 Routing
Board Layout Figure 5. Layer 3 Routing TLC5941EVM-105 EVM SLVU140 – October 2005... -
Page 11: Bottom Layer Routing
Board Layout Figure 6. Bottom Layer Routing SLVU140 – October 2005 TLC5941EVM-105 EVM... -
Page 12: Related Documentation From Texas Instruments
Related Documentation From Texas Instruments Related Documentation From Texas Instruments 1. TLC5941 data sheet (SLVS589) Bill of Materials and Schematic This chapter provides the TLC5941EVM-105 bill of materials and schematic. Bill of Materials Table 6. Bill of Materials Description Size... -
Page 13: Tlc5941Evm-105 Schematic
Bill of Materials and Schematic Schematic Figure 7. TLC5941EVM-105 Schematic SLVU140 – October 2005 TLC5941EVM-105 EVM... -
Page 14: Tlc5941Evm-105 Schematic (Continued)
Bill of Materials and Schematic Figure 8. TLC5941EVM-105 Schematic (Continued) TLC5941EVM-105 EVM SLVU140 – October 2005... -
Page 15: Fcc Warnings
EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2005, Texas Instruments Incorporated... -
Page 16: Important Notice
TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions:... -
Page 17: Texas Instruments
Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TLC5941EVM-156...
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