Infineon BTS740S2 Smart High-Side Power Load Switch, 43V, 50A, SOIC-20

The Infineon BTS740S2 is a sophisticated dual-channel high-side power switch, engineered using advanced Smart SIPMOS technology. It integrates a vertical power FET with embedded protection and comprehensive diagnostic functions, offering a robust and intelligent solution for demanding power management applications.

At its core is an N-channel vertical power MOSFET with an integrated charge pump, enabling efficient switching. The device features ground-referenced CMOS-compatible inputs for easy interfacing with control logic, alongside diagnostic feedback and a proportional load current sense circuit—all monolithically integrated for enhanced reliability and performance.

Key Features and Protections

The switch incorporates multiple layers of protection to ensure operational safety and longevity. These include undervoltage and overvoltage shutdown with auto-restart and hysteresis, safeguarding against power supply irregularities. It is designed for high-energy robustness and offers superior load dump protection, making it exceptionally durable in harsh electrical environments.

A standout feature is its fast demagnetisation capability for inductive loads, which prevents voltage spikes and potential damage. The design also maintains logic ground independence from the load ground, improving noise immunity and system stability. With a high voltage capability and benchmark energy robustness, this component is built to handle challenging conditions with ease.

Specifications and Applications

With an input voltage rating of 43V and a current limit of 50A per channel, the BTS740S2 delivers substantial power handling in a compact SOIC-20 package. Its low on-state resistance of just 0.027ohm minimises power loss and heat generation. Qualified to the stringent AEC-Q100 standard, it is ideal for automotive and industrial environments where reliability is critical. Primary application areas include **soph