Infineon BTS7810K: A High-Current PROFET™ Smart High-Side Switch for Automotive Applications

The increasing electrification of modern vehicles demands robust, intelligent, and highly reliable power management solutions. Addressing this need, the Infineon BTS7810K stands out as a premier PROFET™ (Protected MOSFET) smart high-side switch engineered specifically for demanding automotive environments. This device integrates two independent channels to deliver superior performance for high-current loads, making it an ideal solution for a wide array of applications.

Designed for Automotive Rigor and Reliability

As an automotive-grade component, the BTS7810K is built to withstand the harsh conditions of an automotive electrical system. It operates within a wide supply voltage range and is qualified according to AEC-Q100, ensuring reliability for mission-critical functions. Its robust design offers protection against load-dump pulses, reverse battery conditions, and overvoltage transients, which are common challenges in vehicle power networks.

Dual-Channel, High-Current Capability

A key feature of this PROFET™ switch is its dual-channel architecture. Each channel can handle a continuous current of up to 40 mA for logic and a high-side output current of up to 30 A, with a very low typical on-state resistance (RDS(on)). This high-current capability allows it to drive a variety of high-power loads directly, such as:

DC motors (e.g., for power windows, sunroofs, seat adjustment)

Heating elements (e.g., for steering wheels, seats, window defrosters)

Solenoids and valves

LED lighting modules

By integrating two channels into a single package, it simplifies PCB design, reduces the component count, and enhances system reliability.

Integrated Smart Protection and Diagnostic Features

The "smart" in this high-side switch refers to its comprehensive suite of integrated diagnostic and protection functions. These features are crucial for enhancing system safety and enabling predictive maintenance. The BTS7810K provides:

Overload and short-circuit protection

Over-temperature shutdown with a configurable restart mode

Current sense diagnostic output with adjustable gain for precise load current monitoring

Open-load detection both in on-state and off-state

Ground loss and supply loss protection

The diagnostic feedback is communicated via a dedicated pin, allowing the microcontroller to monitor the status of the load and the switch itself in real-time, enabling a true condition-monitoring system.

Optimized for Efficiency and Control

The device offers excellent electromagnetic compatibility (EMC) performance and features adjustable slew rate control for the output stage. This helps to minimize electromagnetic emissions (EMI), a critical requirement in the noise-sensitive automotive ecosystem. Furthermore, its efficient switching capability contributes to lower power dissipation and improved overall system energy efficiency.

ICGOO In summary, the Infineon BTS7810K PROFET™ represents a highly integrated and intelligent solution for managing high-current loads in vehicles. Its robust protection suite, advanced diagnostic capabilities, and dual-channel high-power output make it an exceptional choice for designers aiming to build safer, more reliable, and efficient automotive electronic systems.

Keywords:

1. PROFET™ Smart Switch

2. Automotive High-Current

3. Dual-Channel Integration

4. Diagnostic Features

5. AEC-Q100 Qualified