Infineon BTS4880R: A High-Current PROFET™+ 2-Channel Smart High-Side Switch
The Infineon BTS4880R is a highly integrated, protected dual-channel high-side switch belonging to the advanced PROFET™+ (Protected FET) family. Designed to handle significant power loads with precision and robustness, this device is engineered for demanding automotive and industrial applications where reliability, diagnostic capability, and compactness are paramount.
Key Features and Capabilities
At its core, the BTS4880R consists of two independent channels, each capable of controlling high-current loads up to 40 A. This makes it exceptionally suitable for driving powerful actuators, motors, heaters, or lighting systems that require substantial power delivery. A standout feature is its extremely low typical on-state resistance (RDS(on)) of just 2.5 mΩ per channel. This high efficiency minimizes power losses and heat generation, which is critical for energy-sensitive designs and thermal management.
The "Smart" aspect of the switch is delivered through its comprehensive suite of embedded protection and diagnostic functions. These include:
Overload and Short-Circuit Protection: Safely limits current to protect both the switch and the load.
Overtemperature Shutdown: Automatically disables the output if the junction temperature exceeds a safe threshold, restarting once it has cooled.
Overvoltage Protection (including load-dump): Shields the device from voltage transients common in automotive environments.
Ground Loss and Supply Loss Protection: Ensures correct operation even in fault conditions.
Advanced Diagnostic Feedback: Provides precise current sense (IS) signals for each channel, proportional to the load current. This allows the microcontroller to detect open-load conditions, short-to-ground, and overtemperature pre-warning, enabling predictive maintenance and system health monitoring.
Target Applications
The combination of high current handling, robust protection, and diagnostic intelligence makes the BTS4880R ideal for a wide range of applications:
Automotive Body Control Modules (BCMs): Controlling seat heaters, window lifters, or sunroof motors.
Powerful Solenoid and Valve Control: In industrial automation and automotive systems.
Heating Elements: Managing high-wattage heaters in various applications.
LED Lighting Modules: For driving high-current LED arrays.
The Infineon BTS4880R stands out as a superior solution for high-current switching tasks. Its exceptional combination of very low RDS(on), high-current capability, and extensive diagnostic features provides designers with a reliable, efficient, and intelligent power switch that simplifies design, enhances system safety, and improves overall reliability in harsh electrical environments.
Keywords:
1. PROFET™+
2. High-Current Switch
3. Low RDS(on)
4. Diagnostic Features
5. Automotive Grade
