High-Performance LED Driver IC for Industrial and Automotive Applications
The TLC5940 is a 16-channel, constant-current sink LED driver from Texas Instruments (TI), designed to deliver precise and efficient control of high-brightness LEDs in demanding applications. With advanced features such as PWM grayscale control, dot correction, and thermal error flagging, this device is ideal for industrial, automotive, and commercial lighting systems where reliability and performance are critical.
Engineered for high-end LED display and lighting systems, the TLC5940 offers a robust solution for designers seeking fine-tuned brightness control, consistent color output, and long-term reliability. Its integrated features reduce the need for external components, simplifying PCB layout and reducing BOM costs.
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Technical Specifications and Parameters
The following table outlines the key technical specifications of the TLC5940 LED driver IC:
| Parameter | Value |
|---|---|
| Number of Output Channels | 16 |
| Output Current (per channel) | Up to 120 mA |
| Supply Voltage (Vcc) | 3.0 V to 5.5 V |
| Output Voltage (Vout) | Up to 17 V |
| Grayscale PWM Control | 12-bit (4096 steps) |
| Dot Correction | 6-bit (64 steps) |
| Thermal Error Flag | Yes |
| Data Transfer Interface | Serial (SPI-compatible) |
| Operating Temperature Range | -40°C to +85°C |
| Package Options | TSSOP-28, HTSSOP-28 |
Why Choose This LED Driver Over Conventional Alternatives?
Compared to standard LED drivers, the TLC5940 offers a unique combination of precision, flexibility, and integration. Its 12-bit PWM grayscale control allows for ultra-smooth dimming and color mixing, essential for high-end display and lighting applications. The 6-bit dot correction compensates for LED brightness variations, ensuring uniform output across all channels.
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Unlike basic constant-current drivers, this device includes a thermal error flag that alerts the system to overheating conditions, enhancing system reliability and safety. The serial interface supports daisy-chaining, enabling scalable designs for large LED arrays without increasing complexity.
Designers benefit from reduced component count and simplified layout due to the integrated features, which translates to lower development costs and faster time-to-market. The TLC5940 is also backed by Texas Instruments’ reputation for quality and long-term product availability, making it a trusted choice for mission-critical applications.
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Typical Applications in Industrial and Automotive Systems
- LED matrix displays for industrial control panels and public information systems
- Automotive interior and exterior lighting, including dashboards and ambient lighting
- Architectural lighting requiring precise color control and dimming
- Stage and studio lighting with high brightness and color fidelity
- Signage and advertising displays with dynamic content and animations
Its robust thermal management and wide operating temperature range make it suitable for harsh environments, while the high channel count supports complex lighting patterns and effects.
About Texas Instruments (TI)
Texas Instruments is a global leader in analog and embedded processing semiconductors. With decades of innovation and a strong commitment to quality, TI provides reliable and scalable solutions for industrial, automotive, and consumer electronics. The TLC5940 is part of TI’s extensive portfolio of LED drivers, known for their performance, integration, and long-term support.
Frequently Asked Questions (FAQ)
1. What is the maximum current output per channel?
The device supports up to 120 mA per channel, allowing it to drive high-brightness LEDs directly without external current-limiting resistors, simplifying circuit design and improving efficiency.
2. Can multiple devices be daisy-chained for larger LED arrays?
Yes, the serial interface is designed to support daisy-chaining, enabling seamless expansion for large-scale LED matrix or lighting systems without increasing control complexity.
3. How does dot correction improve LED performance?
Dot correction compensates for variations in LED brightness by adjusting the current for each channel individually, ensuring consistent light output and color uniformity across all LEDs.
4. Is the TLC5940 suitable for automotive applications?
Yes, with its wide operating temperature range and thermal error flag, the device is well-suited for automotive lighting systems, including dashboards, ambient lighting, and exterior indicators.
5. What package options are available for this IC?
The device is available in TSSOP-28 and HTSSOP-28 packages, offering flexibility for different PCB layouts and thermal performance requirements in compact or high-density designs.
For more information or to request a quote, visit our official website at ICManufacturer.com.
