The BTS428L2 from Infineon Technologies is a high side power switch with integrated vertical power FET, providing embedded protection and diagnostic functions. It is a member of the Classic PROFET family of high-side switches, which are designed for a wide range of automotive and industrial applications.

The BTS428L2 is capable of driving loads up to 5.8A at voltages from 4.75V to 41V. It features a low on-state resistance of 50mΩ, which helps to minimize power losses. The BTS428L2 also has a very low standby current, making it ideal for battery-powered applications.

The BTS428L2 is equipped with a number of protection and diagnostic features, including:

• Overload protection: The BTS428L2 will automatically shut down the load if it detects an overload condition.
• Short-circuit protection: The BTS428L2 will automatically shut down the load if it detects a short circuit.
• Overtemperature protection: The BTS428L2 will automatically shut down the load if it detects an overtemperature condition.
• Ground loss protection: The BTS428L2 will automatically shut down the load if it detects a ground loss condition.
• Power supply loss protection: The BTS428L2 will automatically shut down the load if it detects a power supply loss condition.
• Electrostatic discharge (ESD) protection: The BTS428L2 is protected from ESD damage.

The BTS428L2 is also equipped with a number of diagnostic features, including:

• Current sense: The BTS428L2 can measure the current flowing through the load.
• Temperature sense: The BTS428L2 can measure the temperature of the device.
• Fault detection: The BTS428L2 can detect a variety of fault conditions, such as overloads, short circuits, and overtemperature conditions.

The BTS428L2 is available in a TO252 package. It is a lead-free device and is RoHS compliant.

Applications

The BTS428L2 is suitable for a wide range of automotive and industrial applications, including:

• Automotive: The BTS428L2 can be used to control a variety of automotive loads, such as lighting, fans, motors, and actuators.
• Industrial: The BTS428L2 can be used to control a variety of industrial loads, such as pumps, valves, and solenoids.

Features and benefits

• High-side power switch with integrated vertical power FET
• Embedded protection and diagnostic functions
• Low on-state resistance
• Very low standby current
• Wide operating voltage range
• CMOS compatible input
• Improved electromagnetic compatibility (EMC)
• Fast demagnetization of inductive loads
• Stable behavior at undervoltage
• Logic ground independent from load ground
• Available in TO252 package
• Lead-free and RoHS compliant

Conclusion

The BTS428L2 is a versatile and reliable high side power switch that is well-suited for a wide range of automotive and industrial applications. It offers a number of features and benefits, including low on-state resistance, very low standby current, embedded protection and diagnostic functions, and a wide operating voltage range.