Infineon BTS555E3146 Smart High-Side Power Switch: Features and Applications

The Infineon BTS555E3146 is a state-of-the-art smart high-side power switch designed to deliver robust performance and intelligent control in a wide range of automotive and industrial applications. As part of Infineon’s PROFET™ (Protected MOSFET) family of products, this device integrates advanced protection functions, diagnostic capabilities, and a low on-resistance power stage into a compact and efficient package.

One of the standout features of the BTS555E3146 is its extremely low typical on-state resistance (RDS(on)) of just 1.8 mΩ. This results in minimal power dissipation and high energy efficiency, making it suitable for applications requiring high current handling—up to 55 A—with reduced thermal stress. The device operates from a supply voltage range of 4 V to 28 V, covering standard automotive and industrial DC voltage levels.

The integration of comprehensive protection mechanisms ensures safe and reliable operation under various fault conditions. These include overload protection, short-circuit protection, over-voltage clamp, and overtemperature shutdown. Additionally, the device offers reverse battery protection through an integrated topology, enhancing system durability.

A key advantage of this smart switch is its diagnostic feedback capability via the IS (sense) pin, which provides proportional load current information. This enables precise monitoring and control, supporting functionalities such as open-load detection in both on and off states. The device also features an enable pin that allows direct microcontroller interfacing for straightforward logic-level control.

The BTS555E3146 is housed in a TO-263-7 package that offers excellent thermal performance and facilitates easy PCB mounting. Its automotive-grade qualification ensures reliability under harsh environmental conditions, including wide temperature ranges and high EMI scenarios.

Typical applications include:

- Automotive power management: controlling high-current loads such as motors, heaters, and lighting systems.

- Industrial automation: driving solenoids, actuators, and DC motors.

- Power distribution systems: in body control modules, battery management systems, and fuse replacement units.

ICGOOFIND: The Infineon BTS555E3146 exemplifies modern power switching technology with its high current capability, integrated protection, and diagnostic features—making it an ideal solution for demanding automotive and industrial systems.

Keywords:

Smart High-Side Switch, Overcurrent Protection, Low RDS(on), Diagnostic Feedback, Automotive Power Management