Texas Instruments
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TLC5940NTG4
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TLC5940NTG4

Product Overview

The TLC5940NTG4 is a 16-channel, constant-current sink driver designed for generating programmable, high-quality grayscale images. This integrated circuit falls under the category of LED drivers and is commonly used in applications such as LED displays, signage, and decorative lighting. The TLC5940NTG4 is known for its high grayscale PWM control capabilities, compact package, and efficient performance.

Basic Information

  • Category: LED Driver
  • Use: Generating grayscale images for LED displays and lighting applications
  • Characteristics: High grayscale PWM control, constant-current sink driver
  • Package: TSSOP
  • Essence: Precise grayscale control for LED applications
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Number of Channels: 16
  • Output Type: Constant Current
  • Interface: Serial
  • Supply Voltage: 3V to 5.5V
  • Operating Temperature: -40°C to 85°C
  • Package Type: TSSOP

Detailed Pin Configuration

The TLC5940NTG4 features a 28-pin TSSOP package with the following pin configuration: 1. XLAT 2. BLANK 3. SCLK 4. SIN 5. VPRG 6. IREF 7. OUT15 8. OUT14 9. OUT13 10. OUT12 11. OUT11 12. OUT10 13. OUT9 14. OUT8 15. OUT7 16. GND 17. OUT6 18. OUT5 19. OUT4 20. OUT3 21. OUT2 22. OUT1 23. OUT0 24. VCC 25. DCPRG 26. GSCLK 27. SOUT 28. XERR

Functional Features

  • High grayscale PWM control
  • 12-bit (4096 steps) grayscale control
  • Open-load detection
  • Thermal shutdown protection
  • Daisy-chainable serial interface

Advantages and Disadvantages

Advantages

  • Precise grayscale control
  • Efficient constant-current sink driver
  • Daisy-chainable for scalability
  • Built-in thermal protection

Disadvantages

  • Requires external resistors for current setting
  • Limited to 16 channels

Working Principles

The TLC5940NTG4 operates by receiving grayscale data through its serial interface and converting it into precise current levels for driving LEDs. It utilizes a constant-current sink architecture to ensure consistent brightness across all connected LEDs. The built-in grayscale PWM control allows for smooth dimming and color mixing in LED applications.

Detailed Application Field Plans

The TLC5940NTG4 is well-suited for various applications including: - LED displays - Decorative lighting - Signage - Architectural lighting - Entertainment lighting

Detailed and Complete Alternative Models

Some alternative models to the TLC5940NTG4 include: - TLC5947 - MAX7219 - AS1130 - IS31FL3731

In conclusion, the TLC5940NTG4 is a versatile LED driver offering precise grayscale control and efficient operation, making it an ideal choice for various LED display and lighting applications.

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10 domande e risposte comuni relative all'applicazione di TLC5940NTG4 nelle soluzioni tecniche

  1. What is TLC5940NTG4?

    • The TLC5940NTG4 is a 16-channel, constant-current sink driver with the capability to control multiple LEDs.

  2. How many LEDs can be controlled using TLC5940NTG4?

    • The TLC5940NTG4 can control up to 16 LEDs independently.

  3. What is the maximum current output per channel of TLC5940NTG4?

    • The TLC5940NTG4 has a maximum current output of 120 mA per channel.

  4. Can TLC5940NTG4 be used for dimming LEDs?

    • Yes, TLC5940NTG4 can be used for dimming LEDs by controlling the current through each channel.

  5. What is the communication interface for TLC5940NTG4?

    • TLC5940NTG4 uses a serial interface for communication with microcontrollers or other devices.

  6. Is TLC5940NTG4 suitable for driving RGB LEDs?

    • Yes, TLC5940NTG4 can be used to drive RGB LEDs by controlling the individual channels for red, green, and blue.

  7. What is the supply voltage range for TLC5940NTG4?

    • The supply voltage range for TLC5940NTG4 is typically between 3V and 5.5V.

  8. Can TLC5940NTG4 be cascaded to control more than 16 LEDs?

    • Yes, TLC5940NTG4 can be cascaded to control more than 16 LEDs by connecting multiple devices together.

  9. Does TLC5940NTG4 have built-in thermal shutdown protection?

    • Yes, TLC5940NTG4 includes built-in thermal shutdown protection to prevent damage from excessive heat.

  10. What are some common applications for TLC5940NTG4?

    • Common applications for TLC5940NTG4 include LED displays, signage, decorative lighting, and automotive lighting systems.