TLC5948ADBQR

Overview

The TLC5948ADBQR is a 16-channel, 16-bit ES-PWM constant-current LED driver manufactured by Texas Instruments. It features a boost topology with an output current of 60 mA and operates within a supply voltage range of 3 V to 5.5 V. The device supports a maximum operating frequency of 33 MHz and delivers an output voltage up to 10 V. Packaged in a 24-pin HTSSOP (DBQ) format, it functions across a temperature range of -40°C to +85°C. Key integrated capabilities include dot correction, LED open detection, and PWM control for precise lighting management.

Feature Summary

• Integrates 16-bit Enhanced Serial Pulse Width Modulation (ES-PWM) for high-resolution brightness control across all channels.
• Provides full self-diagnosis functionality including LED open detection and error flagging for system reliability.
• Features built-in dot correction to ensure uniform luminance across multiple LEDs without external calibration components.

Applications

• 7-bit DC and 7-bit Global BC LED lamps
• General-purpose LED lighting systems requiring high channel count
• Display drivers utilizing constant current sink architecture

Procurement Notes

Verify the specific suffix 'ADBQR' corresponds to the HTSSOP-24 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design accounts for the specified humidity sensitivity level during storage and assembly processes to maintain component integrity.

Selection Notes

Select this component for designs requiring independent 16-bit grayscale control per channel alongside global brightness adjustment. The integrated boost converter simplifies driving higher voltage LED strings from low-voltage supplies. Consider the thermal performance within the HTSSOP-24 package relative to total power dissipation in dense PCB layouts.

Part Context

This part belongs to the TLC5948A series of LED drivers designed for applications demanding high channel density and diagnostic feedback. It serves as a specialized solution for replacing discrete driver circuits, consolidating control logic, current regulation, and error detection into a single integrated circuit for efficient system design.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the TLC5948ADBQ (non-reel version). Cross-vendor replacements require careful evaluation of pinout compatibility and electrical parameter alignment to ensure functional equivalence in existing designs.