TLC5940PWPR

Product Overview

Category

The TLC5940PWPR belongs to the category of integrated circuits (ICs) used for driving LEDs.

Use

This product is specifically designed for controlling and driving LED displays and lighting applications.

Characteristics

• The TLC5940PWPR is a 16-channel constant current sink driver.
• It supports grayscale PWM (Pulse Width Modulation) control for each channel, allowing precise brightness adjustment.
• This IC has a built-in programmable grayscale control circuit, eliminating the need for external resistors.
• It operates with a wide supply voltage range of 3V to 5.5V, making it compatible with various power sources.
• The TLC5940PWPR offers high output current capability, up to 120 mA per channel.
• It features a serial interface that enables easy communication with microcontrollers or other control devices.

Package and Quantity

The TLC5940PWPR is available in a TSSOP-28 package. Each package contains one IC.

Specifications

• Supply Voltage: 3V to 5.5V
• Output Current: Up to 120 mA per channel
• Number of Channels: 16
• Grayscale Control: 4096 steps
• Serial Interface: Yes
• Package Type: TSSOP-28

Pin Configuration

The TLC5940PWPR has a total of 28 pins. The pin configuration is as follows:

1. OUT0
2. OUT1
3. OUT2
4. OUT3
5. OUT4
6. OUT5
7. OUT6
8. OUT7
9. OUT8
10. OUT9
11. OUT10
12. OUT11
13. OUT12
14. OUT13
15. OUT14
16. OUT15
17. VCC
18. GND
19. BLANK
20. XLAT
21. SCLK
22. SIN
23. DCPRG
24. VPRG
25. GSCLK
26. XERR
27. MODE
28. IREF

Functional Features

• Grayscale Control: The TLC5940PWPR allows precise control of LED brightness through its 4096-step grayscale control circuit.
• Constant Current Sink: It provides a constant current sink for each channel, ensuring consistent and accurate LED driving.
• Serial Interface: The IC features a serial interface that simplifies communication with external control devices.
• Daisy Chain Capability: Multiple TLC5940PWPR ICs can be daisy-chained together to expand the number of controllable channels.

Advantages and Disadvantages

Advantages

• Precise brightness control with 4096-step grayscale control.
• High output current capability per channel.
• Wide supply voltage range for compatibility with various power sources.
• Simplified circuit design with built-in grayscale control circuit.
• Daisy chain capability for scalability.

Disadvantages

• Limited to driving LEDs and not suitable for other applications.
• Requires external components for proper operation (e.g., resistors for current setting).

Working Principles

The TLC5940PWPR operates by receiving control signals from a microcontroller or other control devices through its serial interface. It uses these signals to adjust the grayscale levels of each channel, controlling the brightness of connected LEDs. The IC incorporates a constant current sink for each channel, ensuring consistent LED driving. By varying the pulse width of the grayscale control signals, the desired brightness levels can be achieved.

Application Field Plans

The TLC5940PWPR finds extensive use in various LED display and lighting applications, including: - LED matrix displays - LED signs and billboards - Automotive lighting systems - Architectural lighting - Stage lighting - Decorative lighting

Alternative Models

For those seeking alternative options, the following ICs can be considered: - MAX7219: A serially interfaced LED driver with built-in grayscale control. - TLC59711: A 12-channel constant current LED driver with integrated PWM control. - IS31FL3731: A 16-channel LED driver with advanced features like pattern scrolling and blinking.

These alternatives offer similar functionality and can be suitable replacements depending on specific requirements.

In conclusion, the TLC5940PWPR is a versatile LED driver IC that provides precise brightness control and high output current capability. Its wide range of applications and compatibility with various power sources make it a popular choice in the field of LED displays and lighting.