Infineon TLD5501-2QV: A High-Performance Multitopology LED Driver for Automotive Lighting Applications

The evolution of automotive lighting, from basic halogen bulbs to sophisticated LED-based systems, demands advanced electronic control. At the heart of this innovation are specialized integrated circuits designed to deliver precision, efficiency, and reliability. The Infineon TLD5501-2QV stands out as a premier solution, engineered specifically to meet the stringent requirements of modern automotive lighting applications.

This LED driver is a synchronous buck controller that excels in its flexibility, supporting a wide range of multitopology configurations. Designers can implement it in standard buck, boost, buck-boost, or SEPIC (Single-Ended Primary-Inductor Converter) setups. This unparalleled adaptability allows a single component to power diverse lighting modules—from low-voltage interior mood lighting and dynamic turn indicators to high-intensity headlights and daytime running lights (DRLs)—simplifying inventory and design complexity.

A key strength of the TLD5501-2QV is its high-performance feature set. It operates at a switching frequency of up to 2.2 MHz, enabling the use of smaller external passive components and thus saving valuable board space. It incorporates a high-accuracy PWM dimming controller capable of achieving a wide dimming ratio, essential for creating dynamic light signatures and adaptive beam patterns. Furthermore, its integrated diagnostics and protection mechanisms, such as over-current, over-voltage, and over-temperature protection, ensure robust operation under the harsh conditions of the automotive environment, including wide temperature ranges and significant voltage transients.

Compliant with the AEC-Q100 qualification standard, the TLD5501-2QV is built for automotive-grade reliability. Its ability to handle input voltages from 3.5 V to 40 V makes it perfectly suited for both passenger vehicles and heavy-duty trucks, ensuring stable performance throughout the entire battery voltage range, including during start-stop events and load-dump scenarios.

ICGOO

D FIND Summary: The Infineon TLD5501-2QV is a highly versatile and robust multitopology LED driver that sets a new benchmark for performance and integration in automotive lighting systems. Its flexibility, high switching frequency, and comprehensive protection features make it an ideal choice for next-generation vehicle illumination.

Keywords:

Automotive LED Driver

Multitopology Controller

Synchronous Buck

AEC-Q100 Qualified

High-Frequency Switching