TLC59283DBQR

Overview

The TLC59283DBQR is a 16-channel constant-current sink LED driver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V and delivers up to 45 mA per channel. The device features an internal boost converter capable of generating an output voltage up to 17 V, supporting high-voltage LED strings. It utilizes a 35 MHz serial interface for data input and includes a pre-charge FET for improved efficiency. The component is housed in a 24-pin SSOP package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a boost converter topology to drive high-voltage LED loads from low supply voltages
• Provides individual channel control via simple serial data writing to internal registers
• Includes dedicated pre-charge FET functionality to enhance system efficiency during startup

Applications

• LED lighting driver circuits requiring constant current regulation
• Portable electronic devices with limited power supply headroom
• Signage and display systems utilizing series-connected LED arrays

Procurement Notes

Verify the specific suffix 'DBQR' corresponds to the 24-SSOP package and reel packaging configuration. Confirm that the 45 mA output current rating aligns with the target LED load requirements. Ensure compatibility with the 3 V to 5.5 V supply voltage range for the intended application environment.

Selection Notes

Select this component when a single IC must manage multiple LEDs with independent on/off control. The integrated boost converter eliminates the need for external inductors in some designs, simplifying layout. Consider the 45 mA per channel limit when determining the number of LEDs per string. Verify thermal dissipation capabilities within the SSOP package for the expected duty cycle.

Part Context

This part belongs to the TLC5928 family of LED drivers from Texas Instruments. Variants such as TLC59281 and TLC59284 share similar architectures but differ in output current ratings or specific feature sets. The TLC59283 specifically combines the 45 mA capability with the boost converter and pre-charge FET features.

Replacement Considerations

Direct substitutes include other parts within the TLC5928 family, such as the TLC59281 or TLC59284, provided their electrical characteristics match the design requirements. Cross-referencing pinouts and functional specifications is essential before substitution.