Infineon BTS442E Smart High-Side Power Switch: Features, Applications, and Benefits
The Infineon BTS442E is a versatile and robust smart high-side power switch designed for a wide range of automotive and industrial applications. As part of Infineon’s PROFET™ (Protected MOSFET) family of products, this device integrates advanced protection, diagnostics, and control features into a compact package, offering designers a reliable and efficient solution for power management.
Key Features
One of the standout characteristics of the BTS442E is its high current capability, supporting continuous loads up to 23A. This makes it suitable for driving high-power loads such as motors, heaters, or lamps. The device operates with a wide supply voltage range from 5.5V to 28V, covering standard automotive and industrial power systems.
The integration of a vertical N-channel power MOSFET ensures low on-state resistance (RDS(on)), which minimizes power dissipation and improves overall system efficiency. Additionally, the BTS442E incorporates multiple built-in protection functions, including:
- Overload and short-circuit protection
- Over-temperature shutdown
- Over-voltage clamp (with active reverse polarity protection)
- Load current feedback for precise diagnostics
These features help enhance system reliability and prevent damage under fault conditions. The device also offers diagnostic feedback via a status output pin, which provides information about operating conditions such as overtemperature or open-load detection.
Typical Applications
Thanks to its robustness and diagnostic capabilities, the BTS442E is widely used in automotive systems, including:
- Powertrain and transmission control
- Engine management systems
- Body control modules (e.g., seat heating, window lifters, sunroof control)
- Lighting systems
In industrial environments, it is often employed in:
- PLC output modules
- Actuator and solenoid control
- Power distribution units
Benefits of Using the BTS442E
Designers benefit from the device’s high level of integration, which reduces the need for external components and simplifies PCB layout. Its efficient thermal performance allows for compact designs even under high load conditions. Moreover, the diagnostic features contribute to improved system monitoring and faster fault detection, which is critical in safety-relevant applications.
The BTS442E is also designed to meet stringent automotive quality standards, ensuring long-term reliability in harsh operating environments.
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The Infineon BTS442E stands out as a highly integrated, protected high-side switch that combines power efficiency, robust protection, and diagnostic intelligence. It is an ideal choice for automotive and industrial applications requiring reliability, compact design, and smart power management.
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Keywords:
Smart High-Side Switch, Automotive Power Management, Over-Current Protection, Load Diagnostics, Infineon PROFET
