TPS922055DRRR

Overview

The TPS922055DRRR is a non-synchronous buck LED driver IC from Texas Instruments, housed in a WSON-12 package. It supports an input voltage range of 4.5 V to 65 V and delivers up to 4 A output current. The device operates with a programmable switching frequency between 100 kHz and 2.2 MHz, utilizing spread spectrum technology for EMI reduction. It features an open-drain fault output and supports analog, PWM, hybrid, and flexible dimming methods. The integrated switching FET enables compact designs, while thermal foldback and shutdown protect against overheating.

Feature Summary

• Integrates a high-side switching FET to minimize external component count
• Supports multiple dimming modes including analog, PWM, hybrid, and flexible control
• Includes comprehensive protection mechanisms such as cycle-by-cycle over-current protection and thermal foldback
• Features LED open and short detection capabilities via the fault output pin

Applications

• General solid-state lighting applications
• Automotive exterior lighting systems
• Industrial LED illumination fixtures

Procurement Notes

Verify the specific ordering suffix DRRR to confirm the tape-and-reel packaging configuration and quantity per reel. Ensure compatibility with the target PCB footprint for the WSON-12 package. Cross-reference the datasheet revision date to confirm the accuracy of electrical specifications and recommended operating conditions before finalizing procurement.

Selection Notes

Select this component when a single-channel, high-voltage buck topology is required for LED strings. The wide input voltage range suits battery-powered or automotive bus applications. Consider the 4 A current limit and WSON-12 thermal performance for power density requirements. Evaluate the need for spread spectrum functionality if strict EMI limits are mandated by the system design.

Part Context

This part belongs to the TPS92205x family of LED drivers designed for high-efficiency constant current regulation. It complements other Texas Instruments power management solutions by providing dedicated control for LED loads. The device integrates necessary protection features typically found in discrete solutions, simplifying the design process for lighting manufacturers.

Replacement Considerations

Consult official substitution guides for direct replacements within the TPS92205x series. Verify pinout compatibility and electrical parameter equivalence for any alternative components. No public substitute part numbers are confirmed in the provided documentation.