TPS61042DRBT

Overview

The TPS61042DRBT is a constant current LED driver IC from Texas Instruments, designed for white LED applications. It functions as a synchronous boost converter with an input voltage range of 1.8V to 6V and supports output currents up to 500mA. The device features a switching frequency of 1MHz and delivers a maximum output voltage of 27.5V to 28V. Operating within a temperature range of -40°C to +85°C, it utilizes an 8-SON (3x3) package with an exposed pad for thermal management.

Feature Summary

• Integrated synchronous boost topology for efficient power conversion
• Constant current regulation capability for precise LED control
• Supports PWM dimming via the CTRL pin interface

Applications

• White LED lighting systems
• Portable electronic device backlighting
• Battery-powered LED drivers

Procurement Notes

Verify the specific suffix DRBT against official Texas Instruments documentation to confirm the reel packaging configuration. Ensure the order matches the required 8-VDFN exposed pad footprint. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement to align with assembly processes.

Selection Notes

Select this component when a compact solution for driving white LEDs from a single-cell lithium battery is required. The 1.8V minimum input voltage allows operation until deep discharge. The 1MHz frequency enables the use of small external inductors and capacitors, optimizing board space constraints for portable designs.

Part Context

This part belongs to the TPS6104x series of switch boost converters. It is specifically engineered for LED illumination tasks requiring regulated current. The DRBT variant denotes the tape-and-reel packaging format, distinguishing it from cut-tape or sample configurations while maintaining identical electrical characteristics.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the TPS6104x family. Verify that any substitute maintains the 500mA output current rating and 1MHz switching frequency to ensure circuit stability without redesign.

FAQ

How is LED brightness controlled?

Brightness is regulated through the CTRL pin using PWM signals. The switching frequency must be higher than the applied PWM frequency to maintain accuracy.

What is the maximum input voltage?

The maximum input voltage is 6V, suitable for single-cell lithium-ion or lithium-polymer battery applications.