Infineon ITS428L2: A High-Performance Dual-Channel Smart High-Side Switch

In the realm of automotive and industrial electronics, the demand for robust, intelligent, and compact power management solutions is ever-increasing. The Infineon ITS428L2 stands out as a premier solution, engineered to meet these rigorous demands as a state-of-the-art dual-channel smart high-side switch. This device integrates two independent channels into a single package, offering a powerful combination of performance, diagnostic capabilities, and protection features that are critical for modern applications.

At its core, the ITS428L2 is designed to drive resistive or inductive loads—such as valves, motors, lamps, and heaters—with exceptional efficiency and control. Each channel can handle a continuous current of up to 4.5 A, making it suitable for a wide range of medium-power applications. Its operation is based on a vertical power MOSFET technology, which ensures very low typical on-state resistance (RDS(on)), thereby minimizing conduction losses and improving overall system energy efficiency.

One of the most significant advantages of this smart high-side switch is its comprehensive suite of diagnostic and protection features. The ITS428L2 provides detailed feedback to the microcontroller, including load current sense, detection of open-load conditions, and overtemperature warnings. Crucially, it is also equipped with robust protections against short circuits to ground or battery, overvoltage, and electrostatic discharge (ESD). These built-in safeguards enhance system reliability, reduce the need for external protection components, and simplify design complexity.

Furthermore, the device is AEC-Q100 qualified, underscoring its suitability for the harsh environments encountered in automotive applications. It operates reliably over a wide temperature range and is designed to withstand the electrical transients typical in automotive systems. The integration of two channels into a single SSOP-14 package also contributes to a significant reduction in PCB space, supporting the trend towards more compact and lightweight electronic control units (ECUs).

The ITS428L2's proportional load current sense feature is particularly valuable for application control and diagnostics. It provides an analog output voltage proportional to the load current, enabling precise monitoring without the need for external shunt resistors. This allows for real-time diagnostics and smarter control strategies, paving the way for predictive maintenance and enhanced functional safety.

ICGOOODFIND Summary: The Infineon ITS428L2 is a highly integrated, dual-channel smart switch that delivers superior performance, advanced diagnostics, and robust protection. It is an ideal choice for designers seeking to enhance reliability and efficiency in automotive body electronics, industrial automation, and power distribution systems.

Keywords: Smart High-Side Switch, Dual-Channel, Diagnostic Features, AEC-Q100 Qualified, Load Current Sense.