Infineon BTS3046SDR: High-Side Power Switch with Diagnostic and Protection Features

The Infineon BTS3046SDR is a highly integrated, intelligent high-side power switch designed for robust automotive and industrial applications. Fabricated using Infineon’s proprietary Smart SIPMOS technology, this device combines a powerful N-channel vertical MOSFET with a sophisticated CMOS control circuit on a single chip. Its primary function is to serve as an electronic switch capable of controlling heavy resistive or inductive loads—such as motors, valves, heaters, or lamps—with unparalleled precision and protection.

A key strength of the BTS3046SDR lies in its comprehensive suite of diagnostic and protection features, which ensure system reliability and safety under harsh operating conditions. The device offers precise current sensing through a dedicated IS pin, providing a proportional current feedback signal to the microcontroller for real-time load monitoring. This is critical for diagnosing issues like short circuits, open loads, or overloads. Furthermore, it incorporates multiple protective functions including protection against over-current (ISD), over-temperature (TSD), over-voltage, and electrostatic discharge (ESD). In the event of a fault, the device immediately shuts down and communicates the status back to the control unit via its diagnostic feedback (DS) pin, significantly simplifying system diagnostics and maintenance.

The BTS3046SDR is housed in a compact, surface-mountable TO-252 (DPAK) package, offering efficient power dissipation and saving valuable PCB space. Its ability to handle a continuous output current of up to 6.5A and operate within a wide voltage range makes it an ideal solution for driving a vast array of demanding loads in 12V or 24V systems, from body electronics and powertrain modules in vehicles to factory automation systems.

ICGOODFIND: The Infineon BTS3046SDR stands out as an exceptionally reliable and intelligent high-side switch. Its powerful integration of advanced diagnostic capabilities and robust protective mechanisms makes it a superior choice for designers building fault-tolerant and high-performance systems in the automotive and industrial sectors.

Keywords: High-Side Power Switch, Diagnostic Features, Protection Functions, Smart SIPMOS Technology, Current Sensing