TLC5945RHBT

Overview

The Texas Instruments TLC5945RHBT is a 16-channel LED driver IC housed in a 32-VQFN (5x5 mm) package. It features 12-bit PWM grayscale control and 6-bit dot correction for each channel. The device operates on a supply voltage ranging from 3 V to 5.5 V, with an output current capability of 80 mA per channel. It utilizes a linear shift register topology and includes internal GS clock generation. The component supports serial data input and is designed for applications requiring precise LED brightness regulation within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates 12-bit PWM grayscale dimming and 6-bit per-channel dot correction for uniform LED appearance
• Utilizes a linear shift register architecture for simplified serial data interface and control
• Provides constant current output regulation with high per-channel current capacity

Applications

• High-density LED matrix displays
• Backlighting systems for portable electronics
• Architectural and decorative LED lighting arrays

Procurement Notes

Verify the specific suffix RHBT corresponds to the VQFN-32 package and tape-and-reel delivery format. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Cross-reference pinout diagrams with PCB layout requirements to prevent interface mismatches during assembly.

Selection Notes

Select this component when 16 channels of independent PWM control with dot correction are required. It is suitable for designs needing 80 mA output current per channel without external boost converters. Consider thermal dissipation capabilities given the exposed pad package. Evaluate system complexity against simpler drivers if dot correction functionality is not necessary for the application.

Part Context

This part belongs to the TLC594x series of LED drivers from Texas Instruments. It shares architectural similarities with the TLC5940 and TLC5946 but offers distinct current ratings and feature sets. The TLC5945 specifically targets applications requiring higher per-channel current than the TLC5940 while maintaining dot correction capabilities found in the TLC5946 family.

Replacement Considerations

The TLC59401RHBR serves as a functional substitute for basic 16-channel driving but lacks dot correction. The TLC5946RHBT provides similar features including dot correction but differs in output current specifications. Verify electrical compatibility and pin-to-pin alignment before substituting these alternatives.