TLC5946RHBT

Overview

The TLC5946RHBT is a Texas Instruments LED display driver featuring 16 channels with 12-bit PWM grayscale control. It operates within a 3 V to 5.5 V supply range and supports up to 45 mA power supply current. The device utilizes a VQFN-32 package for surface mount installation. Electrical parameters include a maximum power dissipation of 3.482 W, low-level output current of 5 mA, and high-level output current of -1 mA. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates 6-bit dot correction capability to address LED brightness uniformity issues.
• Includes error flag functionality for detecting communication or configuration faults.
• Provides hardware-based fault detection mechanisms for open and short circuit conditions.
• Supports daisy-chain connection via serial data interface for multi-device expansion.

Applications

• LED matrix displays requiring precise grayscale control
• Backlight systems for portable electronic devices
• Signage applications needing high channel count density

Procurement Notes

Verify the specific suffix 'T' indicates cut tape packaging rather than reel configuration when ordering. Confirm RoHS compliance status through official manufacturer documentation as required by project specifications. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Cross-reference the full part number against distributor catalogs to avoid confusion with the 'R' suffix variant which denotes reel packaging.

Selection Notes

Choose this component when 16-channel independent PWM control is required alongside per-LED brightness calibration. The VQFN-32 package offers a compact footprint suitable for space-constrained designs. Consider the thermal performance limits defined by the 3.482 W power dissipation rating during high-load operations. Verify compatibility with existing serial control interfaces before integration into the system architecture.

Part Context

This part belongs to the TLC5946 series of LED drivers from Texas Instruments. It shares core functional specifications with variants like the TLC5946RHBR, differing primarily in packaging format. The series is designed for applications demanding high-resolution grayscale rendering and efficient channel management in LED-based visual output systems.

Replacement Considerations

The TLC5946RHBR serves as a direct substitute offering identical electrical characteristics but supplied in reel packaging instead of cut tape. Both parts share the same VQFN-32 footprint and pinout configuration, allowing for potential board layout flexibility depending on assembly requirements.