Infineon BTS640S2: High-Side Power Switch with Diagnostic and Protection Features
The Infineon BTS640S2 is a robust and intelligent high-side power switch engineered for demanding automotive and industrial applications. It integrates a low on-resistance DMOS power transistor with advanced control, diagnostic, and protection circuitry into a single, compact package. This device is designed to drive resistive or inductive loads—such as heaters, lamps, solenoids, or small motors—with exceptional reliability and precision.
A key strength of the BTS640S2 lies in its comprehensive diagnostic and protection features. It provides detailed feedback to the microcontroller, including current sense and load current proportional (IS) output, enabling real-time monitoring of the load status. This allows for the detection of various fault conditions such as short circuits to ground or battery, overloads, and open-load scenarios—both in on and off states. The integrated protections include overtemperature shutdown with latch behavior, which ensures the device turns off and remains off until reset if the junction temperature exceeds a safe threshold. Additionally, it features overvoltage protection (clamping) and overcurrent limitation, safeguarding both the switch and the load from electrical damage.
The device operates with a wide supply voltage range (5.5 V to 40 V), making it suitable for 12 V and 24 V battery systems commonly found in vehicles and machinery. Its very low standby current and compatibility with 3.3 V and 5 V logic-level control signals from a microcontroller make it highly efficient and easy to integrate into modern electronic systems.
In summary, the BTS640S2 offers a powerful combination of high current handling capability, minimal power dissipation, and intelligent system monitoring, providing designers with a reliable and space-saving solution for robust electronic power switching.
Keywords: High-Side Power Switch, Diagnostic Features, Overcurrent Protection, Overtemperature Shutdown, Current Sense Output
