TLC5946RHBRG4

Overview

The TLC5946RHBRG4 is a Texas Instruments LED display driver featuring 16 channels with 12-bit PWM grayscale control. It operates within a supply voltage range of 3 V to 5.5 V and supports an operating temperature from -40°C to +85°C. The device utilizes a VQFN-32 surface-mount package. Key technical specifications include a maximum power dissipation of 3.482 W, a maximum supply current of 45 mA, and output currents ranging from -1 mA (high) to 5 mA (low). It integrates 6-bit dot correction for uniformity.

Feature Summary

• Integrates 12-bit PWM grayscale dimming for precise LED brightness control across 16 channels.
• Includes 6-bit per-channel dot correction capability to ensure consistent luminance uniformity.
• Provides comprehensive fault management features including error flags, open/short detection, and latch-up protection.

Applications

• High-density LED matrix displays
• LED backlighting systems requiring uniform brightness
• Signage and advertising displays

Procurement Notes

Verify the specific suffix G4 indicates lead-free compliance when sourcing. Confirm the VQFN-32 package dimensions against PCB footprint requirements. Ensure thermal design accounts for the specified power dissipation limits under full load conditions. Check moisture sensitivity level handling procedures during assembly.

Selection Notes

Select this component for applications requiring high-resolution grayscale without external microcontrollers for timing. Consider the VQFN-32 package for space-constrained designs. Evaluate thermal performance given the 3.482 W dissipation rating. Verify compatibility with existing SPI or similar serial interfaces used for data input.

Part Context

This part belongs to the TLC5946 series of LED drivers from Texas Instruments. It is functionally equivalent to the TLC5946RHBR but includes the G4 suffix denoting environmental compliance. It serves as a modern replacement for older packages like the TSSOP variants in new designs.

Replacement Considerations

• TLC5946RHBR

FAQ

What is the purpose of the 6-bit dot correction?

It allows individual channel adjustment to compensate for manufacturing variations, ensuring uniform brightness across all LEDs.

Does the device support daisy-chaining?

Yes, multiple TLC5946 devices can be connected in series to drive larger numbers of LEDs using a single data line.