Infineon BTS133 Smart High-Side Power Switch: Features and Applications

The Infineon BTS133 is a versatile smart high-side power switch designed to deliver robust performance and enhanced protection in a wide range of automotive and industrial applications. As part of Infineon’s PROFET™ (Protected MOSFET) family, this device integrates advanced control, diagnostic, and protection features into a compact package, making it an ideal solution for driving resistive or inductive loads with high reliability.

One of the standout features of the BTS133 is its integrated protection mechanisms. The device includes overload protection, short-circuit protection, and overtemperature shutdown, ensuring safe operation under fault conditions. Additionally, it offers reverse battery protection up to -18V, a critical requirement in automotive environments where voltage transients are common. The switch also features low quiescent current in standby mode, making it suitable for battery-powered applications.

The BTS133 supports PWM (Pulse Width Modulation) capability, allowing efficient control of load current and power dissipation. This is particularly useful in applications requiring precise speed or brightness control, such as in DC motor drives or LED lighting systems. The device operates with a wide input voltage range, typically from 5.5V to 36V, accommodating standard automotive and industrial power supplies.

Another key advantage is its diagnostic feedback functionality. The status pin provides real-time information on operating conditions, including open-load detection in off-state and fault indications during overcurrent or overtemperature events. This enables proactive system monitoring and simplifies debugging and maintenance.

Applications of the BTS133 span across various domains. In automotive systems, it is commonly used to control lights, heaters, solenoids, and small motors. Its robustness makes it ideal for body control modules, power seat modules, and engine management systems. In industrial settings, the device finds use in programmable logic controllers (PLCs), factory automation, and power distribution units, where reliable switching and protection are paramount.

The BTS133 is available in a TO-252 (DPAK) package, offering efficient thermal performance and ease of mounting on PCBs. Its combination of integration, protection, and diagnostic features reduces external component count, lowers system cost, and improves overall reliability.

ICGOODFIND: The Infineon BTS133 stands out as a highly integrated and protected high-side switch, ideal for demanding automotive and industrial applications. Its blend of diagnostic capabilities, robust protection features, and PWM support makes it a top choice for designers seeking efficiency and reliability.

Keywords:

Smart High-Side Switch, Overcurrent Protection, PWM Capability, Diagnostic Feedback, Automotive Applications.