TLD5190QV: Infineon's High-Performance LED Driver for Automotive Lighting Applications

The evolution of automotive lighting from traditional halogen bulbs to advanced Light Emitting Diodes (LEDs) has demanded a new generation of robust and efficient power management solutions. Addressing this need, Infineon Technologies introduces the TLD5190QV, a highly integrated synchronous step-down (buck) controller designed specifically to drive high-current LEDs in the demanding automotive environment. This driver stands out by offering exceptional performance, reliability, and flexibility for applications such as adaptive driving beam (ADB) systems, headlights, and fog lights.

A key strength of the TLD5190QV is its wide input voltage range from 4.5 V to 40 V. This ensures stable operation despite the notoriously volatile conditions of an automotive electrical system, which can experience extreme transients like load-dump pulses. The device can deliver a continuous output current of up to 5 A, providing ample power for even the most luminous LED arrays.

The driver employs a fixed-frequency peak current mode control architecture. This method ensures excellent line and load regulation, resulting in consistent LED brightness without flicker—a critical factor for safety and comfort. Its high switching frequency, adjustable up to 2.3 MHz, allows designers to use smaller external inductors and capacitors, thereby saving valuable board space and reducing the overall bill of materials.

Recognizing the critical nature of automotive safety, the TLD5190QV is built with a comprehensive suite of advanced protection features. These include over-current protection (OCP), over-temperature protection (OTP), over-voltage protection (OVP), and short-circuit protection. Each feature is designed to safeguard both the driver IC and the connected LEDs from potential damage, enhancing the longevity and reliability of the lighting system.

Furthermore, the device supports PWM dimming with a wide dimming ratio, enabling precise control over light intensity. This is essential for modern functionalities like automatic beam adjustment and daytime running light (DRL) dimming. Packaged in a VQFN-32 (5x5mm) and qualified according to AEC-Q100 Grade 1, the TLD5190QV is engineered to perform reliably in the harshest automotive conditions, from -40°C to +125°C.

ICGOODFIND: The Infineon TLD5190QV emerges as a superior, all-in-one solution for next-generation automotive lighting. Its robust design, high efficiency, extensive diagnostic capabilities, and compliance with stringent automotive standards make it an ideal choice for engineers developing high-performance, reliable, and compact LED driving systems for modern vehicles.

Keywords: Automotive LED Driver, High Current, AEC-Q100, Wide Input Voltage, PWM Dimming