Blog về công ty Supply Infineon Pressure Sensors:BAP/MAP Sensor,IoT Sensor,SAB Sensor,TPMS

Supply Infineon Pressure Sensors:BAP/MAP Sensor,IoT Sensor,SAB Sensor,TPMS

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I. Barometric Pressure and Manifold Air Pressure Sensors (BAP/MAP)

Barometric pressure (BAP) and manifold absolute pressure (MAP) sensors are core components of automotive engine control systems and fundamental elements in general industrial pressure monitoring. They are primarily used to collect real-time data on ambient atmospheric pressure and the pressure within the engine’s intake manifold, providing the essential basis for the vehicle’s ECU to precisely regulate fuel injection volume, ignition timing and air intake. These sensors are key components in ensuring engine power output, fuel economy and low emissions.

Infineon’s XENSIV™ BAP/MAP sensors utilise a monolithic MEMS integration process, combining the pressure sensing unit, signal processing circuitry and temperature compensation module. By eliminating the need for traditional discrete component designs, they significantly simplify the end-circuit structure. The product supports wide-range pressure detection, catering to the intake monitoring requirements of petrol and hybrid vehicles with varying engine displacements, whilst also being compatible with general industrial pressure monitoring applications. In terms of performance, this series of sensors offers high-precision detection across a wide temperature range, maintaining stable accuracy in the harsh in-vehicle temperature conditions of -40°C to 125°C. This effectively counteracts measurement errors caused by temperature drift, resolving the issue of data distortion in high and low-temperature operating conditions typically encountered with traditional sensors.

Compared to similar products in the industry, Infineon’s BAP/MAP sensors incorporate multi-stage filtering and anti-interference design, enabling them to withstand external disturbances such as in-vehicle electromagnetic interference and airflow fluctuations, whilst delivering fast response times and excellent repeatability in measurement data. They also support multiple signal output types, including analogue and digital, making them compatible with mainstream in-vehicle electronic control systems and industrial data acquisition equipment. They are widely used in applications such as intake air monitoring for internal combustion engines, air pressure regulation in hybrid systems, ambient air pressure monitoring in industrial equipment, and pressure detection in exhaust after-treatment systems, helping automotive manufacturers achieve energy savings and emissions reductions whilst enhancing engine operational stability.

II. Pressure Sensors for the Internet of Things

Tailored for lightweight, low-power and miniaturised applications such as the Internet of Things (IoT), smart wearables, portable devices and smart home systems, Infineon has launched the XENSIV™ digital barometric pressure sensor series for the IoT. This series addresses key industry challenges faced by IoT end devices, such as short battery life, space constraints, poor environmental adaptability and insufficient measurement accuracy, and serves as the core sensing hardware for lightweight smart devices.

The core advantages of this sensor series centre on four key characteristics: ultra-low power consumption, micro-scale packaging, high precision and ease of integration. The products utilise an extremely streamlined chip architecture and low-power MEMS processes, significantly optimising both active and sleep mode power consumption. This effectively extends the battery life of IoT devices and meets the long-standby requirements of wireless sensor nodes and portable devices. The highly miniaturised package size allows for seamless integration into space-constrained devices such as wearables, micro-monitoring terminals and smart home modules, without occupying valuable space in the device’s core layout.

In terms of detection performance, these IoT-specific pressure sensors offer outstanding absolute and relative accuracy, with exceptional data stability across a wide temperature range. They can precisely detect minute changes in atmospheric pressure and support specialised functions such as altitude calibration, ambient pressure monitoring and device airtightness testing. The sensors feature excellent interface compatibility, coming standard with I²C and SPI high-speed communication interfaces. Data is read quickly and transmitted reliably, eliminating the need for additional conversion circuits and significantly reducing development and mass production costs for end devices. They are currently widely used in scenarios such as altitude and atmospheric pressure monitoring in smartwatches and fitness trackers, wireless IoT pressure sensing nodes, smart home environmental monitoring, portable meteorological equipment, and drone altitude stabilisation, perfectly meeting the development requirements of IoT devices for lightweight design, intelligence and long battery life.

III. Side Impact Detection Pressure Sensor (SAB)

Automotive side impact detection pressure sensors are core components of vehicle passive safety systems and form part of Infineon’s automotive safety sensor portfolio. They are primarily designed for use in side airbag (SAB) deployment systems and pedestrian protection systems, monitoring sudden pressure changes in real time during a side impact to provide precise data support for rapid airbag deployment and passive safety protection, thereby significantly enhancing the safety of both drivers and passengers.

Represented by the flagship model KP200, the XENSIV™ side impact detection sensors feature a fully monolithic integrated design, incorporating all functional modules—including pressure sensing, signal amplification, data processing and interface transmission—without the need for external auxiliary circuits, making them suitable for modular installation within vehicle doors. The product strictly complies with the automotive industry standards PSI5 and AK-LV 29. It offers exceptional resistance to vibration, shock and electromagnetic interference, enabling it to cope with the complex conditions of road bumps and electromagnetic interference encountered whilst the vehicle is in motion, thereby eliminating false triggers and missed triggers.

Its operating principle is as follows: in the event of a side-impact collision, the door panel undergoes compression and deformation, causing an instantaneous change in pressure within the internal cavity. The sensor captures the pressure pulse signal within milliseconds and transmits a precise proportional electrical signal to the vehicle’s ECU. The ECU rapidly assesses the severity of the collision based on the signal strength and immediately triggers the deployment of side airbags and side curtain airbags, thereby minimising injury to occupants. Furthermore, this sensor supports PRO-SIL safety level compliance, meeting the stringent requirements of automotive functional safety. In addition to side-impact detection, it can also be adapted for extended applications such as vehicle-pedestrian protection and body cavity pressure monitoring. Thanks to its high reliability, it has become the component of choice for body safety systems among leading automotive manufacturers.

IV. Tyre Pressure Monitoring System (TPMS) Sensors

Infineon’s XENSIV™ Tyre Pressure Monitoring System (TPMS) sensors are core components of automotive active safety systems. Available in two main solutions—direct and indirect—they monitor tyre internal pressure and temperature data in real time, providing timely warnings of abnormal tyre pressure, air leaks, and high-temperature overloads. This effectively mitigates driving safety hazards such as tyre blowouts and veering, whilst also helping to reduce vehicle energy consumption and extend tyre service life.

This series of TPMS sensors integrates multifunctional modules including pressure detection, temperature sensing, data encoding and wireless transmission. The core SP400 series supports a wide pressure detection range of 100–1,400 kPa, covering the tyre pressure monitoring requirements of all vehicle types, including passenger cars, commercial vehicles and lorries. Manufactured to stringent automotive-grade standards, the products are resistant to high temperatures, high pressure and ageing. They are designed to withstand the extreme conditions inside tyres—including high temperatures, high pressure and high vibration—over the long term, ensuring accurate data detection and stable operation whilst eliminating issues such as data drift and monitoring failures.

In terms of functionality, the TPMS sensor features autonomous data collection, intelligent anomaly detection and high-frequency wireless transmission capabilities. It synchronises tyre pressure and temperature data in real time with the vehicle’s central control system, enabling visual monitoring. In the event of anomalies such as excessively high or low tyre pressure, rapid air loss or excessive tyre temperature, the system issues an immediate warning to alert the driver to take prompt action. Furthermore, the product complies with RoHS environmental standards. With a streamlined package design that facilitates mass production and integration, it is compatible with mainstream vehicle TPMS system architectures. Combining excellent value for money with high reliability, it is widely used in passenger cars, commercial lorries and new energy vehicles, serving as a core sensor solution for active vehicle safety protection.

V. Summary

Infineon’s four major categories of pressure sensors, underpinned by mature XENSIV™ MEMS core technology, precisely cover the four key sectors of automotive powertrain control, body safety protection, in-vehicle active safety and IoT smart sensing, forming a differentiated and comprehensive product portfolio. From general-purpose atmospheric pressure and intake air monitoring for industrial and automotive applications, to lightweight, low-power IoT sensing, and on to automotive-grade collision detection and tyre pressure monitoring, all product types embody Infineon’s core strengths of high precision, high reliability, high integration and ease of adaptation. They not only meet the stability requirements of demanding industrial operating conditions but also cater to the demands for lightweight design and long battery life in consumer electronics, whilst fully complying with the automotive electronics industry’s standards for high safety, high stability and high regulatory compliance. In this way, they continue to drive industrial upgrading towards intelligent manufacturing, automotive safety and lightweight IoT solutions.