TLC5940RHBR

Overview

The TLC5940RHBR is a 16-channel constant current sink LED driver manufactured by Texas Instruments. It features 4096-step grayscale PWM control and 64-level dot correction for uniform brightness. The device operates on a 3V to 5.5V supply with a maximum output current of 120mA per channel. It utilizes a VQFN-32 package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides independent 4096-step grayscale PWM dimming for each of the 16 channels.
• Includes internal 64-level dot correction to compensate for LED manufacturing variations.
• Features open-load detection and thermal shutdown for system protection.

Applications

• High-density LED matrix displays
• Backlighting for LCD panels
• General-purpose LED lighting systems

Procurement Notes

Verify the specific suffix 'RHBR' against the manufacturer's latest datasheet to confirm the tape-and-reel packaging configuration. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the ordering part number with official Texas Instruments documentation to avoid substitution errors during procurement.

Selection Notes

Select this component when precise grayscale control and brightness uniformity are required across multiple LEDs. It is suitable for designs needing high channel density in a compact VQFN-32 footprint. Consider the 120mA sink capability for driving standard LEDs without external transistors.

Part Context

This part belongs to the TLC5940 family, which integrates grayscale and brightness control into a single IC. It simplifies design by reducing the need for external microcontrollers to manage individual LED timing. The RHBR variant specifically denotes the surface-mount reel packaging option.

Replacement Considerations

TLC5940RHB: Pin-compatible alternative with identical electrical specifications but potentially different packaging or revision status.

FAQ

How does dot correction function?

Dot correction allows users to store 6-bit values in EEPROM to adjust the peak current of each channel, compensating for LED efficiency differences.

What interface is used for data input?

Data is shifted in via a serial interface compatible with standard SPI-like protocols, using SIN, SCLK, and XLAT pins.