Infineon TLE8386-2EL: A High-Current Dual-Channel Low-Side Switch for Automotive Applications

The increasing electrification of modern vehicles demands robust, efficient, and intelligent power switching solutions. The Infineon TLE8386-2EL stands out as a premier device engineered to meet these rigorous demands, offering a powerful and protected interface between microcontrollers and high-current loads in the automotive environment.

This IC is a dual-channel low-side switch capable of driving resistive or inductive loads—such as valves, motors, solenoids, and lamps—with a continuous current of up to 5.5 A per channel. Its ability to handle such significant current makes it an ideal choice for a wide array of body control and powertrain applications, including engine management, transmission control, and advanced lighting systems.

A cornerstone of the TLE8386-2EL's design is its comprehensive suite of diagnostic and protection features, which are critical for ensuring system safety and reliability. Each channel is equipped with protection against over-load, over-current, and over-temperature conditions. Furthermore, the device provides sophisticated diagnostic feedback to the host microcontroller, including reports on short circuits to ground or battery (SCG/SCB), open-load conditions both in on and off states, and overtemperature warnings. This level of diagnostics is vital for automotive functional safety (ISO 26262) compliance, enabling systems to take corrective action or enter a safe state when a fault is detected.

Built on Infineon's proven SPT9 technology, the TLE8386-2EL achieves an excellent balance between low saturation voltage (low power dissipation) and high integration. The device operates from a standard 12 V vehicle power system and features a wide operating voltage range, enhancing its resilience against load dump and other voltage transients common in the automotive electrical environment. It also includes built-in protection against reverse battery conditions and electrostatic discharge (ESD).

With its two independent channels controlled via separate logic inputs, the IC offers flexible control while minimizing the component count on the PCB. Its compact, space-saving PG-DSO-14 package is designed for automated assembly and provides good thermal performance.

ICGOODFIND: The Infineon TLE8386-2EL is a highly integrated, robust, and intelligent dual-channel low-side switch. Its high-current capability, coupled with its extensive diagnostic and protection features, makes it an exceptional solution for enhancing the reliability, safety, and performance of automotive electronic systems, aligning perfectly with the industry's move towards more electrified and intelligent vehicles.

Keywords:

1. Automotive

2. Low-Side Switch

3. High-Current

4. Diagnostic Features

5. Protection Functions