TLC5945RHBR

Overview

The TLC5945RHBR is a Texas Instruments LED driver IC featuring 16 channels with 12-bit PWM grayscale control and 6-bit dot correction. It operates on a 3V to 5.5V supply voltage within an industrial temperature range of -40°C to +85°C. The device utilizes a VQFN-32 package and includes internal current regulation for each channel. Key specifications include a maximum output current of 80mA per channel, a 30MHz shift clock frequency, and a 17V output voltage capability. It supports daisy-chaining via serial data and latch inputs.

Feature Summary

• Integrates 12-bit grayscale PWM control for precise brightness adjustment across all channels.
• Provides 6-bit dot correction to compensate for manufacturing variations in LED luminance.
• Features internal constant current sinks with programmable reference resistor setting.
• Supports serial data input and daisy-chain architecture for multi-device expansion.

Applications

• LED backlighting systems for displays
• General-purpose LED indicator arrays
• Portable electronic device illumination

Procurement Notes

Verify the specific suffix RHBR corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the component meets RoHS compliance standards as indicated by manufacturer documentation. Ensure compatibility with the intended PCB footprint for the VQFN-32 package during procurement validation.

Selection Notes

Select this component when 16 individually controllable LED channels are required with high-resolution grayscale dimming. The integrated dot correction feature simplifies hardware design by reducing external calibration requirements. Consider the thermal dissipation capabilities of the VQFN-32 package relative to the total power consumption of the connected LED array.

Part Context

This part belongs to the TLC594x series of LED drivers from Texas Instruments, designed for applications requiring multiple channels of PWM-controlled current sinking. The RHBR suffix denotes the specific reel packaging variant. It complements other series members like the TLC5946 and TLC5947 by offering a balance of channel count and control precision.

Replacement Considerations

TLC5945PWPR is a pin-compatible alternative in a different package type. TLC5945PWPG4 is a lead-free variant of the PWPR package. Verify electrical parameters and package dimensions before substituting with these parts.

FAQ

How is the output current for each channel determined?

The output current is set by an external reference resistor connected to the IREF pin, allowing for precise current programming across the 16 channels.

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

Dot correction compensates for individual LED brightness variations by adjusting the current sink value for each channel independently, ensuring uniform appearance.