TLC5921DAP

Overview

The TLC5921DAP is a linear LED lighting driver IC manufactured by Texas Instruments, housed in a 32-pin HTSSOP package. It features 16 constant current outputs with an output current of 80 mA per channel and a maximum power dissipation of 3.9 W. The device operates on a supply voltage ranging from 4.5 V to 5.5 V, supporting a maximum operating frequency of 20 MHz and delivering up to 17 V output voltage. It includes thermal shutdown protection and functions within a temperature range of -20°C to +85°C.

Feature Summary

• Integrates a shift register and data latch for serial data input control
• Provides constant current regulation via an external programming resistor
• Includes built-in thermal shutdown circuitry for overtemperature protection

Applications

• LED backlighting systems
• General LED illumination circuits
• Signage displays

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Confirm moisture sensitivity level handling procedures during assembly. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when designing circuits requiring 16 individually addressable constant current channels. It is suitable for applications needing simple serial interface control without complex PWM dimming logic. Consider the 32-pin HTSSOP footprint for PCB layout constraints. Evaluate thermal management needs given the 3.9 W power dissipation capability.

Part Context

This part belongs to the TLC5921 series of LED drivers from Texas Instruments. It is designed as a cost-effective solution for driving multiple LEDs in series or parallel configurations. The device simplifies design by integrating necessary control logic and current regulation into a single compact package.

Replacement Considerations

TLC5921DAPRG4 is listed as a parameter-equivalent alternative.