Overview
The TLC5940QRHBREP, produced by Texas Instruments, is a 16-channel constant-current sink LED driver. This device is designed to provide precise control over LED brightness and is particularly useful in applications requiring high-resolution grayscale and dot correction. The TLC5940QRHBREP features a flexible serial interface, allowing easy integration with microcontrollers or digital signal processors. It supports 4096-step grayscale PWM brightness control and 64-step dot correction, which can be stored in an integrated EEPROM. The device also includes error detection features such as LED open detection and thermal error flags, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Channels | Number of LED channels | 16 |
| Grayscale PWM Control | Number of steps for grayscale control | 4096 steps (12-bit) |
| Number of steps for dot correction | 64 steps (6-bit) | |
| Maximum Current Capability | Maximum current per channel | 120 mA |
| Package Options | Available package types | HTSSOP (28-pin), VQFN (32-pin) |
| Operating Temperature Range | Temperature range for operation | -40°C to 125°C |
| Supply Current | Typical supply current (no data transfer, all outputs off) | 0.9 mA to 6 mA (depending on R(IREF)) |
Key Features
- Grayscale PWM Control: 4096-step (12-bit) grayscale PWM brightness control for each channel.
64-step (6-bit) dot correction, storable in integrated EEPROM. - Constant-Current Sink: Each channel operates as a constant-current sink, with the maximum current value set by an external resistor.
- Error Detection: LED open detection (LOD) and thermal error flag (TEF) for monitoring and error reporting.
- Flexible Serial Interface: Three-pin serial interface for easy integration with microcontrollers or digital signal processors.
- EEPROM Storage: Dot correction data can be stored in the integrated EEPROM.
Applications
- LED Lighting Systems: Suitable for various LED lighting applications requiring high-resolution brightness control and dot correction.
- Display Systems: Ideal for display systems, such as LED signs, scoreboards, and other display panels.
- Automotive Lighting: Can be used in automotive lighting systems where precise control over LED brightness is necessary.
- Industrial Lighting: Applicable in industrial lighting solutions that require reliable and precise LED control.
Q & A
- What is the number of channels supported by the TLC5940QRHBREP?
The TLC5940QRHBREP supports 16 LED channels.
- What is the resolution of the grayscale PWM control?
The grayscale PWM control has a resolution of 4096 steps (12-bit).
- How is the dot correction data stored?
The dot correction data is stored in the integrated EEPROM.
- What is the maximum current capability of the TLC5940QRHBREP?
The maximum current capability is 120 mA per channel.
- What types of packages are available for the TLC5940QRHBREP?
The device is available in HTSSOP (28-pin) and VQFN (32-pin) packages.
- What is the operating temperature range of the TLC5940QRHBREP?
The operating temperature range is -40°C to 125°C.
- How does the TLC5940QRHBREP handle error detection?
The device includes LED open detection (LOD) and thermal error flag (TEF) for error detection.
- What is the purpose of the serial interface on the TLC5940QRHBREP?
The serial interface allows for easy integration with microcontrollers or digital signal processors and is used to input data for grayscale and dot correction control.
- Can the TLC5940QRHBREP be used in automotive lighting systems?
- What software tool is available for designing LED frames with the TLC5940QRHBREP?
The LED Frame Designer Software allows users to individually control the Dot Correction and PWM dimming levels for each LED and program multiple LED frames.
