BTS7200-2EPA

The BTS7200-2EPA is a dual-channel intelligent high-side power switch from Infineon Technologies’ state-of-the-art PROFET™+2 12V family. Built on Infineon’s advanced SMART7 power technology, this device represents the next generation of smart power switches with significantly improved performance, diagnostics, and protection compared to earlier PROFET generations.

Each of the two channels features a typical on-resistance of only 66.5mΩ (120mΩ maximum), enabling efficient 1.2A load driving in a compact PG-TSDSO-14 package. The wide operating voltage range from 3.1V to 28V, combined with the ability to start at voltages as low as 2.7V, ensures reliable operation even during severe cold-crank conditions in automotive applications.

A hallmark of the PROFET+2 generation is the highly accurate proportional current sense function. A single IS pin provides a multiplexed current sense output proportional to the load current, enabling precise load current monitoring for advanced diagnostics. The device supports open-load detection in both the ON and OFF states, as well as detection of short circuits to both ground and battery supply.

Advanced protection features include overcurrent protection with latch tripping and intelligent restart control, absolute and dynamic temperature limitation with controlled restart behavior, undervoltage shutdown with recovery delay, and overvoltage protection capability with external components. The device also supports Inverse ON operation, allowing it to switch on even when current flows in the reverse direction.

The BTS7200-2EPA is AEC-Q100 Grade 1 qualified and ISO 26262-ready, with comprehensive safety documentation available for integration into functional safety systems. This makes it suitable for safety-related automotive applications such as lighting, actuators, and powertrain auxiliary loads in both conventional and electric vehicles. With production guaranteed through at least 2040, it provides long-term supply security for automotive programs.

The BTS7200-2EPA is a dual-channel intelligent high-side power switch that integrates advanced SMART7 technology for superior performance and diagnostics. Here are the key functional blocks for each channel:

1. Power Stage: Each channel features an N-channel vertical power MOSFET with very low on-resistance (66.5mΩ typical). As a high-side switch, the MOSFET connects the load to the positive supply voltage when turned on. An integrated charge pump generates the gate drive voltage above VS needed for N-channel high-side operation. The two channels share supply and ground but are otherwise functionally independent.

2. Input Control: Each channel has its own logic input (IN1, IN2) for independent ON/OFF control. The inputs are compatible with 3.3V and 5V CMOS logic levels, with hysteresis for noise immunity. A DEN (Diagnostic Enable) pin controls diagnostic output behavior and can be used for multiplexing or enabling/disabling the sense output.

3. Proportional Current Sense: The IS pin provides a highly accurate current mirror output proportional to the load current. The sense ratio kILIS determines the scaling between actual load current and sense current. This analog proportional sense allows the external microcontroller to precisely monitor the load current for advanced diagnostics, predictive maintenance, and precise current regulation.

4. Overcurrent Protection with Latch Trip: When the output current exceeds the current limit threshold (7.3-10A typical), the device trips and latches off after a defined time, rather than cycling indefinitely. Intelligent restart control allows configurable restart behavior, providing robust protection against short circuits while minimizing nuisance tripping.

5. Thermal Protection: Advanced thermal management includes both absolute temperature limitation (maximum junction temperature protection) and dynamic temperature limitation, which adjusts the current limit based on temperature to optimize power handling. Controlled restart ensures smooth recovery after thermal events.

6. Open Load Detection: The device can detect open-load conditions both when the channel is ON and when it is OFF. In the ON state, very low current indicates a missing or burned-out load. In the OFF state, a small sense current detects whether the load is properly connected. This is valuable for LED and bulb monitoring applications.

7. Undervoltage Shutdown: If the supply voltage drops below the undervoltage threshold, the device shuts down to prevent undefined operation. A recovery delay ensures the supply is stable before restarting, preventing chattering during brown-out conditions.

8. Inverse ON Capability: A unique feature of the PROFET+2 family is the ability to switch on even when current flows in the reverse direction (from output to supply). This is useful in applications where back-driving or reverse current conditions may occur, such as certain motor or solenoid configurations.

Package: PG-TSDSO-14 (14-lead Thin Shrink Dual Small Outline package). Body dimensions: approximately 5.0mm × 4.4mm, 0.65mm fine pitch lead spacing, exposed thermal pad on bottom. Small footprint for space-constrained automotive electronics designs.

• Automotive LED Lighting Control: Driving LED headlight modules, DRL (Daytime Running Lights), taillights, and interior LED lighting in body control modules (BCMs) and light control units, where accurate current sensing enables LED health monitoring and open/short fault detection for diagnostic reporting.
• Automotive Body Electronics: General-purpose load switching in BCMs, door modules, seat controllers, and trunk modules for solenoids, small motors, heating elements, and indicator lamps, replacing mechanical relays with solid-state reliability and diagnostics.
• NEV Powertrain Auxiliaries: Auxiliary load control in new energy vehicles (BEV, PHEV), including cooling system valves, pump drivers, heater control, and high-voltage system auxiliary loads, where ISO 26262 readiness supports functional safety requirements.
• Safety-Related Automotive Systems: Load control in safety-relevant systems such as brake light drivers, turn signal indicators, and ADAS sensor power supplies, leveraging the ISO 26262-ready design and comprehensive safety documentation for ASIL-rated systems.
• HVAC Flap and Actuator Drivers: Driving HVAC blend door actuators, recirculation flaps, and stepper motors in climate control systems, with current sensing providing stall detection and position feedback for improved climate control accuracy and diagnostics.
• R5W/W5W Lamp Drivers: Directly driving small automotive bulbs such as R5W and W5W type indicator lamps, side markers, and interior lights, with the device’s high inrush current capability handling lamp turn-on surges and open-load detection for bulb-out monitoring.
• Relay and Solenoid Drivers: Driving automotive relays, solenoid valves, and small contactors in transmission control, fuel injection systems, and emissions control equipment, where the inductive load handling and diagnostics improve system reliability.
• Door and Seat Control Modules: Power distribution in door modules (lock actuators, mirror heaters, ambient lighting) and seat control units (position motors, heating elements), with the compact TSDSO-14 package enabling high-density designs in space-constrained locations.