TLC5943RHBT

Overview

The TLC5943RHBT is a Texas Instruments LED lighting driver IC featuring 16 constant current outputs in a 32-VQFN package. It operates on a 3 V to 5.5 V supply with a 30 MHz SPI interface. Each channel delivers up to 50 mA at an output voltage of 17 V. The device supports linear topology and functions within a -40°C to +85°C temperature range.

Feature Summary

• Integrates 16 independent constant current sinks for precise LED brightness control
• Utilizes a 3-wire serial interface for simplified data and clock transmission
• Includes internal oscillators for both grayscale and PWM dimming operations

Applications

• LED backlighting systems
• General LED illumination circuits
• Portable electronic displays

Procurement Notes

Verify the specific suffix RHBT confirms the VQFN-32 package and tape-and-reel shipping configuration. Ensure compatibility with the system's 3 V to 5.5 V power rails and 30 MHz serial clock limits. Confirm RoHS compliance status matches project requirements before finalizing procurement orders.

Selection Notes

Select this component when 16 individually controllable channels are required in a compact surface-mount footprint. It is suitable for designs needing moderate current drive without external transistors. Consider thermal dissipation capabilities if operating near maximum current limits across all channels simultaneously.

Part Context

This part belongs to the TLC594x family of LED drivers from Texas Instruments. It shares architectural similarities with the TLC5940 and TLC5946 but offers a distinct 16-channel configuration optimized for cost-sensitive applications requiring reliable grayscale and PWM dimming performance.

Replacement Considerations

Direct substitutes include the TLC5940RHBR or TLC5946RHBT, though pinouts and feature sets like dot correction may differ. Verify electrical parameters and software compatibility before swapping components in existing designs.