Overview
The BTS50005-1LUA AUMA1 represents Infineon's latest generation of smart high-side power switches, combining power MOSFET technology with intelligent control circuitry. Designed for 12V/24V automotive systems and industrial applications, this device integrates multiple protection functions while maintaining compact dimensions. Its AUMA1 suffix indicates specific packaging and pinout configurations optimized for automated assembly processes. As a member of the PROFET™ (Protected MOSFET) family, this component delivers reliable performance in harsh electrical environments. The device typically operates within a 5.5V to 36V supply range, making it suitable for various vehicular systems including body control modules, power distribution units, and mechatronic applications requiring robust switching capabilities.
Structure and Working Principle
The BTS50005-1LUA AUMA1 employs a vertical DMOS power transistor as its switching element, controlled by a CMOS logic interface. The integrated charge pump generates the necessary gate drive voltage, enabling low on-state resistance (typically 0.5mΩ) for minimal power dissipation. Diagnostic feedback is provided through a current-sense output pin that delivers a proportional current signal representing load conditions. Internal protection circuits monitor for overcurrent, overtemperature, and short-circuit conditions. When thresholds are exceeded, the device enters a protected state while maintaining the failure information in a latch. The open-drain status output provides system-level fault indication, supporting predictive maintenance strategies in automotive networks.
Key Features
With a continuous current rating of 50A (higher for pulsed operation), the BTS50005-1LUA AUMA1 handles demanding load conditions while maintaining excellent thermal performance. The device features extremely low standby current (<10μA) critical for modern vehicle electrical systems with strict quiescent current requirements. Advanced current limitation characteristics provide smooth load turn-on while protecting against short circuits. The component's diagnostic capabilities include accurate load current measurement (with ±15% typical accuracy) and distinct signaling for overtemperature versus overcurrent events. Reverse battery protection (-40V) and inductive load clamping ensure reliability during fault conditions. The AEC-Q100 qualification confirms automotive-grade robustness for temperature cycling, mechanical stress, and humidity resistance.
Application Areas
Primary applications center around automotive body electronics, including seat heating controls, window lift modules, and lighting systems. The device's diagnostic features make it particularly valuable for smart junction boxes implementing power distribution with condition monitoring. Industrial uses include actuator controls in manufacturing equipment and power management in mobile machinery. In electric vehicle architectures, the BTS50005-1LUA AUMA1 finds application in auxiliary power distribution for HVAC compressors and battery management systems. Its combination of current handling and diagnostic capabilities supports ISO 26262 functional safety implementations when used in appropriate system architectures. The component's leadless TO-263-7 package (PG-TO263-7-11) enables compact PCB layouts with efficient thermal management.
Maintenance and Precautions
While the BTS50005-1LUA AUMA1 requires minimal maintenance in normal operation, proper PCB design significantly impacts long-term reliability. Ensure adequate copper area for heat dissipation, following the thermal resistance specifications in the datasheet. The device's exposed pad must be properly soldered to the PCB's thermal plane with recommended stencil and reflow profiles. System designers should implement appropriate bulk capacitance near the power supply pins to handle inductive loads. Electrical transient protection may be required in environments with significant load dump or jump start conditions exceeding the built-in protections. Regular monitoring of the diagnostic output helps identify developing faults before they cause system failures.
B2B Procurement Guide
When sourcing the BTS50005-1LUA AUMA1, verify the manufacturer's latest revision status as performance characteristics may evolve. Genuine components should display proper Infineon markings and packaging with anti-counterfeit measures. Lead times for automotive-grade parts typically range 12-20 weeks, necessitating careful inventory planning. Evaluate total cost of ownership considering the device's ability to replace discrete solutions (MOSFETs+drivers+protection circuits). Request samples for validation in actual application conditions, particularly regarding thermal performance. For high-volume automotive projects, engage directly with Infineon's automotive sales teams to secure allocation and discuss specific qualification requirements.
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