Overview
The TLC5945PWPR is a 16-channel, constant-current sink LED driver produced by Texas Instruments. This integrated circuit is designed to control the brightness of LEDs with high precision, making it suitable for various display and lighting applications. The device features 12-bit grayscale PWM control, allowing for 4096 different brightness steps, and a 6-bit dot correction mechanism to adjust for brightness variations between LED channels. It operates with a supply voltage range of 3.0 V to 5.5 V and can handle output currents up to 80 mA per channel.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 16 | |
| Grayscale PWM Control | 12-bit (4096 steps) | |
| Dot Correction | 6-bit (64 steps) | |
| Maximum Output Current per Channel | 0 mA to 80 mA | |
| Supply Voltage Range | 3.0 V to 5.5 V | V |
| Output Voltage Range | –0.3 V to 17 V | V |
| Data Transfer Rate | 30 MHz | |
| Operating Ambient Temperature Range | –40°C to 85°C | °C |
| Package Type | 28-HTSSOP |
Key Features
- Grayscale PWM Control: 12-bit control allowing for 4096 different brightness steps.
- Dot Correction: 6-bit correction to adjust for brightness variations between LED channels.
- Constant-Current Sink: Each channel has an individually adjustable current sink.
- Error Detection: LED open detection and thermal error flag (TEF) for overtemperature conditions.
- Serial Interface: Flexible serial data interface with a 30 MHz data transfer rate.
- Blanking Function: Ability to blank all outputs with a single signal.
Applications
- LED Signboards and Displays: Ideal for controlling the brightness of LEDs in signboards and various display applications.
- Display Backlighting: Suitable for backlighting in LCD displays.
- Full-Color, Multicolor, and Monocolor LED Displays: Can be used in a variety of LED display configurations.
Q & A
- What is the number of channels supported by the TLC5945PWPR?
The TLC5945PWPR supports 16 channels.
- What is the resolution of the grayscale PWM control?
The grayscale PWM control has a 12-bit resolution, allowing for 4096 different brightness steps.
- How does the dot correction feature work?
The dot correction feature adjusts the brightness variations between LED channels using a 6-bit correction mechanism.
- What is the maximum output current per channel?
The maximum output current per channel is 80 mA.
- What is the operating supply voltage range of the TLC5945PWPR?
The operating supply voltage range is from 3.0 V to 5.5 V.
- Does the TLC5945PWPR have error detection features?
Yes, it includes LED open detection and a thermal error flag (TEF) for overtemperature conditions.
- What is the data transfer rate of the serial interface?
The data transfer rate is 30 MHz.
- What is the package type of the TLC5945PWPR?
The package type is 28-HTSSOP.
- How does the blanking function work?
The blanking function allows all outputs to be disabled with a single signal by setting the BLANK pin high.
- What are some common applications of the TLC5945PWPR?
Common applications include LED signboards, display backlighting, and full-color, multicolor, and monocolor LED displays.
