TLC5940PWPRG4

Overview

The TLC5940PWPRG4 is a 16-channel constant-current sink LED driver manufactured by Texas Instruments. It features individually adjustable 4096-step grayscale PWM brightness control for each channel, enabling precise dimming. The device includes EEPROM-based dot correction to ensure uniform LED intensity across all outputs. It operates within a supply voltage range of 3 V to 5.5 V and supports an output current of 120 mA per channel. The IC is housed in a 28-HTSSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides 16-channel constant-current sinking with individual 4096-step grayscale PWM control for high-resolution dimming.
• Integrates non-volatile EEPROM memory for storing dot correction data to maintain consistent LED brightness across channels.
• Includes built-in diagnostic capabilities such as open LED detection and error flagging for system reliability.

Applications

• LED backlighting systems
• General LED lighting drivers
• Display panel illumination

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's latest documentation to confirm compliance with current environmental standards and pinout configurations. Ensure that the 28-HTSSOP package dimensions align with the target PCB footprint. Confirm that the required grayscale resolution and current sinking capabilities meet the design specifications before finalizing procurement.

Selection Notes

Select this component when high-resolution grayscale control and channel-to-channel uniformity are critical requirements. The integrated dot correction feature reduces the need for external calibration components. Consider the thermal performance of the HTSSOP package under maximum load conditions. Verify compatibility with the host controller's serial interface for data loading and daisy-chaining capabilities.

Part Context

This part belongs to the TLC5940 series of LED drivers from Texas Instruments. It is designed for applications requiring precise control of multiple LEDs without complex external circuitry. The PWPRG4 designation indicates a specific tape-and-reel packaging variant with RoHS-compliant manufacturing processes. It serves as a core component in modern LED display and lighting solutions.

Replacement Considerations

TLC5940PWPR

FAQ

How does the TLC5940PWPRG4 handle LED fault detection?

The device includes an error flag output that signals if any channel detects an open LED condition or a short to ground, allowing the system to identify faults.

What is the purpose of the EEPROM in this IC?

The EEPROM stores dot correction values that compensate for manufacturing variations in LED forward voltage, ensuring uniform brightness across all 16 channels.