Texas Instruments TLC5947 24-Channel LED Driver IC – TSSOP Package

High-Performance 24-Channel Constant-Current LED Driver – TLC5947

O TLC5947 is a high-precision, 24-channel, constant-current sink LED driver from Texas Instruments (TI), designed for demanding industrial and commercial lighting applications. With its integrated PWM control and advanced grayscale dimming capabilities, this device delivers exceptional performance in LED matrix displays, signage, and architectural lighting systems. Engineered for reliability and scalability, it supports daisy-chaining and offers a wide range of current control features, making it a preferred choice for engineers and system designers.

Technical Overview of the 24-Channel LED Driver

This device is built to provide consistent current regulation across all channels, ensuring uniform brightness and color accuracy in multi-LED configurations. It supports 12-bit grayscale PWM control and features a built-in LED open detection function. The integrated shift register and latch circuitry simplify the interface with microcontrollers or FPGAs, reducing system complexity.

Caraterísticas principais

• 24 constant-current sink output channels
• Controlo da escala de cinzentos PWM de 12 bits
• Adjustable output current up to 30 mA per channel
• Built-in LED open detection
• Supports daisy-chaining for scalable designs
• Thermal error flag and thermal shutdown protection
• Wide supply voltage range: 3.0 V to 5.5 V

Especificações técnicas

Why This LED Driver Outperforms Typical Alternatives

Compared to conventional LED drivers, this device offers a superior combination of precision, scalability, and protection features. The integrated 12-bit PWM control ensures fine-grained brightness adjustment, which is critical for high-resolution displays and color mixing applications. Unlike basic drivers that require external components for current regulation, this device integrates constant-current sinks, reducing BOM cost and board space.

Its daisy-chain capability allows multiple devices to be connected in series, simplifying the design of large LED arrays. The built-in thermal error flag and shutdown features protect the system from overheating, enhancing long-term reliability. Additionally, the open LED detection function helps in real-time fault monitoring, which is essential for mission-critical applications such as industrial indicators and medical equipment.

According to industry experts and engineers, the device’s robust performance and ease of integration make it a go-to solution for professional-grade LED systems. Its adoption in commercial lighting and display systems is a testament to its reliability and performance.

Aplicações típicas em sistemas industriais e comerciais

• LED matrix displays and video walls
• Architectural and stage lighting
• Digital signage and information boards
• Industrial status indicators
• Medical device illumination
• Consumer electronics with RGB LED backlighting

Its high channel count and precise current control make it ideal for applications requiring synchronized multi-LED operation. The device is also suitable for use in systems where thermal management and fault detection are critical.

Sobre a Texas Instruments - Um líder de confiança em semicondutores

Texas Instruments (TI) is a globally recognized leader in analog and embedded processing semiconductor solutions. With decades of innovation and a strong commitment to quality, TI components are widely used in automotive, industrial, and consumer electronics. The company’s focus on reliability, performance, and support makes it a preferred choice for engineers and OEMs worldwide.

The TLC5947 is part of TI’s extensive portfolio of LED drivers, known for their precision, scalability, and robust protection features. TI’s commitment to long-term product availability and comprehensive documentation ensures that designers can confidently integrate their solutions into both new and legacy systems.

Perguntas frequentes (FAQ)

1. Qual é a corrente máxima de saída por canal?

The device supports up to 30 mA per channel, allowing for high-brightness LED operation while maintaining consistent current regulation across all 24 channels.

2. Can multiple devices be connected together?

Yes, the device supports daisy-chaining, enabling multiple units to be connected in series. This is ideal for large LED arrays or matrix displays requiring synchronized control.

3. What kind of protection features are included?

It includes thermal error flagging and thermal shutdown protection, which help prevent damage due to overheating. It also features open LED detection for real-time fault monitoring.

4. What is the benefit of 12-bit PWM control?

The 12-bit PWM control allows for 4096 levels of brightness per channel, enabling smooth dimming and precise color mixing in RGB applications or grayscale displays.

5. What package options are available?

The device is available in TSSOP-32 and QFN-32 packages, offering flexibility for different PCB layouts and thermal management requirements in compact designs.

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