Infineon Technologies

BSP78

BSP78 Description

The BSP78 from Infineon Technologies is a high-performance low-side power switch designed for automotive applications, complying with AEC-Q100 standards. It integrates a 1-input, 1-output configuration with a maximum output current of 4A (typ) and operates within a voltage range of -0.2V to 10V. Packaged in a 4-pin (3+Tab) SOT-223 format with tape-and-reel (T/R) mounting, it is optimized for surface-mount (SMD/SMT) applications. The device features a low on-resistance (45mΩ typical, 50mΩ max) and a high power dissipation capability of 3.8W, making it suitable for demanding environments with operating temperatures up to +150°C.

BSP78 Features

• Automotive-Grade: Compliant with AEC-Q100, ensuring reliability in harsh automotive conditions.
• Low On-Resistance: 45mΩ (typ) minimizes power losses, improving efficiency.
• High Current Handling: Supports up to 4A (typ) output current with a 24A current limit for robust performance.
• Fast Switching: On/Off times ≤100µs enable quick response in dynamic applications.
• Thermal Resilience: 3.8W power dissipation and 150°C max operating temperature ensure durability.
• Compact & Robust: SOT-223 package (6.5x3.5x1.6mm) with a tab for enhanced thermal management.
• Compliance: RoHS & EU RoHS compliant, with EAR99 ECCN for global usability.

BSP78 Applications

The BSP78 excels in automotive and industrial systems requiring precise power switching, such as:

• Load Switches for ECUs, sensors, and actuators.
• Motor Control in HVAC, fuel pumps, and wiper systems.
• Power Distribution Modules in 12V/24V automotive networks.
• Protection Circuits with built-in current limiting (24A max) and thermal resilience.
• Battery Management Systems (BMS) due to its low standby losses and high efficiency.

Conclusion of BSP78

The BSP78 stands out as a high-efficiency, automotive-qualified power switch with low resistance, fast switching, and robust thermal performance. Its compact SOT-223 package and AEC-Q100 compliance make it ideal for space-constrained, high-reliability applications. Compared to similar models, it offers superior current handling, lower power dissipation, and faster response times, making it a top choice for automotive and industrial power management.