The functions of the seat provides cabin comfort and importantly safety to the driver and passengers. It is not only an important contributor to the user experience but also a differentiator for car makers.
With additional functions, modern seat modules now comes with increased complexity comparable to body control modules. Integration of functions will be the key factor to manage all requirements in the smallest space, lowest power dissipation and low quescent current. Infineon MOTIX™ products avoid compromise between EMC performance and power dissipation, controlling EMC emission during PWM operation.
Scalability within product families has become necessary to support increasing number of configuratble varients by car manufactureres. Infineon’s TRAVEO™ T2G MCU family supports flexible platform design, while PROFET™ family has the most scalable portfolio of smart high side switches in the market.
The monitoring functions of the seat control are found off-board, outside of the main ECU, such as XENSIV™ Hall sensors for tracking seat position, or XENSIV™ absolute pressure sensors which indicate the state of air bladders used in lumbar adjustment, massage or active bolster control.
Features
- Seat adjustment or seat movement, e.g., the setting of position, height, length, width, angle, back angle, and also headrest position and angle
- Seat comfort, e.g. dynamic bolsters, lumbar support, massage, heating, cooling and/or ventilation, “air-scarf”, entry aid, and individualized adjustment memory
- Seat safety functions such as seatbelt pretensioner, which are part of the vehicle safety system
- Seat passenger detection, several sensors are the built-in seat and feedback to the system for more safety and reliability
Key components
- OPTIREG™ SBC (System Basis Chip) gathers in one product a system supply, communication interface, diagnosis, switching functions, and failsafe output with the best-in-class quiescent current.
- MOTIX™ DC Motor System IC combines supply, communication, diagnosis, switching functions, and failsafe output along with half-bridge gate drives
- MOTIX™ Multi MOSFET Driver IC to control up to eight Half-Bridges (with external MOSFETs) with best-in-class quiescent current
- MOTIX™ Single half-bridge IC, low ohmic protected single Half-Bridge Switch (with integrated MOSFETs)
Block diagram
