Infineon Technologies Co., Ltd. launched two new XENSIVs for automotive applications ™ Air pressure (BAP) sensors: KP464 and KP466. KP464 is mainly designed for engine control management, while KP466 BAP sensors are mainly used for seat comfort functions.

KP464 helps improve fuel efficiency and reduce power consumption

The KP464BAP sensor can measure atmospheric pressure, which depends on altitude and weather conditions. The engine management system can use the measured data of the sensor to calculate the Density of air to ensure the optimal air-fuel ratio. This is a key function for improving fuel efficiency and reducing power consumption. With the reduction of energy loss, the emissions of carbon dioxide and other pollutants will also be minimized. Infineon's KP464 BAP sensor integrates diagnostic functions such as density measurement and manifold air pressure monitoring. Lower power consumption and miniaturization of packaging can improve the production efficiency of devices.

KP466 helps improve comfort and brings more technological advantages

The new generation KP466 BAP sensor from Infineon enables seat manufacturers to implement innovative pneumatic seat systems with numerous additional functions. These features not only improve comfort, but also have significant technological advantages. For example, the multi contour seat function allows passengers to adjust the seat contour according to their personal needs; The air device integrated into the lumbar support and seat cushion allows the seat to adapt to the body contour; The massage function further enhances the comfort of passengers during long-distance travel by alternately inflating and deflating the air device; The driving dynamics function can automatically adjust the lateral support of the seat based on the current driving situation, providing the best stability for passengers in various situations, including turning.

This optimized solution significantly reduces power consumption and adopts a miniaturized five hole housing. The system continuously monitors the pressure status and adjusts the seat cushion pressure according to current requirements. For this purpose, the system uses multiple absolute pressure sensors to monitor the pressure of the entire system. This Infineon sensor also supports SPI, enabling efficient system communication.

Technical characteristics of KP464 and KP466 sensors

Both KP464 and KP466 sensors are high-performance, high-precision, and miniaturized digital absolute pressure sensors based on capacitive measurement principles. Both sensors meet the AEC-Q103-002 standard and meet the requirements of the automotive industry. Therefore, these devices reduce the workload and error risk in module and system authentication. Its surface is micro machined and has a single-chip integrated signal conditioning circuit. Both devices can convert physical pressure into 10, 12, or 14 digit digital values and transmit information through the SPI interface.

In addition, these two sensors can also be integrated into a daisy chain, which minimizes the number of connection pins for the communication microcontroller and supports the use of any number of pressure sensors. And it can also be used in combination with other Infineon system components.

Not only that, the chip also integrates a temperature sensor. 10 bit, 12 bit, or 14 bit temperature information will also be transmitted through the SPI interface according to the received SPI command. Both sensors come with special power saving modes, allowing users to further reduce the power consumption of the sensors. In addition, it also integrates diagnostic functions for testing sensor units and signal paths, improving the reliability of the device. This diagnosis will be automatically completed during sensor startup and wake-up, and can also be directly triggered through SPI commands.