Smart High-Side Power Switch PROFET Two Channels, 60 m? # Technical Documentation: BTS5235G High-Side Power Switch
Manufacturer : Infineon Technologies (Note: "LNFINEON" appears to be a typographical reference; the official manufacturer is Infineon Technologies AG)
Document Version : 1.0
Date : October 26, 2023
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## 1. Application Scenarios
The BTS5235G is a smart single-channel high-side power switch based on Infineon's proprietary Smart High-Side Power (SIPMOS) technology . It is designed for the robust switching of resistive, inductive, and capacitive loads in harsh automotive and industrial environments. Its integrated protection and diagnostic features make it a cornerstone for modern electronic power distribution.
### 1.1 Typical Use Cases
* Direct Load Control: Driving various loads directly from a microcontroller's logic-level output, including:
* Resistive Loads: Incandescent bulbs, heating elements, PTC heaters.
* Inductive Loads: Solenoids (e.g., for door locks, valves), relays, small DC motors (with appropriate free-wheeling diodes).
* Capacitive Loads: LED modules with significant buffer capacitance.
* Power Distribution Module (PDM): Serving as a fundamental building block in centralized or zonal body control modules (BCM) for functions like interior lighting, window lifters, seat adjustment, and fan control.
* Replacement for Relays & Discrete Circuits: Offering a solid-state, space-saving, and diagnostic-capable alternative to electromechanical relays and complex MOSFET-driver circuits.
### 1.2 Industry Applications
* Automotive (Primary Market):
* Body Electronics: Control of headlights, fog lights, interior lighting, windshield wipers, power windows, sunroofs, and door locks.
* Comfort & Convenience: Seat heaters, mirror adjustment, HVAC blower control.
* Powertrain: Actuation of small valves or solenoids in engine management or transmission control systems.
* Industrial Automation:
* Control of actuators, small motors, and solenoid valves in PLC (Programmable Logic Controller) output stages.
* Factory automation equipment and robotic systems requiring robust and diagnosable switching.
* Consumer/Appliance:
* High-reliability power switching in white goods (e.g., washing machine pumps, dishwasher valves) and professional appliances.
### 1.3 Practical Advantages and Limitations
Advantages:
* Integrated Protection: Features like overload protection , short-circuit protection (with current limitation) , overtemperature shutdown with restart , and overvoltage protection (clamping) significantly enhance system reliability and reduce external component count.
* Advanced Diagnostics: Provides a status feedback pin (ST) that signals open-load (in off-state), overtemperature pre-warning, and fault conditions (short-circuit/overload/overtemperature shutdown), enabling predictive maintenance and fault logging.
* Low Power Consumption: Very low quiescent current in standby mode, crucial for automotive applications with strict quiescent current budgets.
* EMC Robustness: Designed to meet stringent automotive EMC standards, with good immunity to transients and low electromagnetic emission.
* Ease of Use: Logic-level compatible input, requiring minimal external circuitry.
Limitations:
* Power Dissipation: As a high-side switch, all load current passes through the integrated MOSFET, leading to I²R losses . The component's thermal performance (RthJA) and the PCB design are critical for maximum current capability. It is not suitable for very high-current applications (>20A continuous without exceptional cooling).
* Cost: Per channel, it is typically
