Tire Pressure Monitoring System (TPMS) is an active vehicle safety system based on wireless transmission technology. Highly sensitive miniature wireless sensor modules fitted inside the tires collect data such as tire pressure and temperature while the vehicle is moving or parked and transmit it to a receiver unit in the cabin, which displays tire pressure, temperature and other related data digitally in real time and warns the driver with a buzzer or voice prompt when a tire behaves abnormally (blowout prevention). This keeps tire pressure and temperature within the specified range, reducing the likelihood of blowouts and tire damage and lowering fuel consumption and wear on vehicle components.
Solution Overview
Our flagship TPMS (tire pressure monitoring) offering is a complete solution built on NXP devices. On the receiver-unit display side it suits both OE and aftermarket requirements, and it can alert the driver in several ways: sending data over LIN or CAN to the instrument cluster or trip computer, driving an external display, or pushing the data to a phone over Bluetooth.
Recommended MCU
- NCK291X series
- e.g. NCK2910 (no MCU)
- or NCK2912
- or NCK2913 (frequency hopping)
- FXTH87EXX series
- e.g. FXTH87E0915
- or FXTH87E0918
- KEA series
- e.g. KEA64
Core Components
- Automotive MCU: S32K116/KEA (NXP)
- RF receiver: NCK2913 (NXP)
- Sensor: FXTH8715 (NXP)
- UHF transmitter: PCF7900 (NXP)
- LIN transceiver: NXP, full part number available on request
Reference Design Development kit part number: TPMS_DEMO Rev.B / TPMS receiver unit
- NCK2913 frequency-hopping receiver, low power consumption and high sensitivity
- In OE applications the RF sections of TPMS and PEPS can be combined into a single RF repeater, improving RF reception performance while reducing cost
- S32K automotive-grade main controller
Reference Design TPMS repeater
- In OE mode the LIN bus is used to communicate with the display; in aftermarket mode an RF link is used, relayed by the PCF7900
- KEA automotive-grade main controller
Reference Design TPMS sensor module
- Integrates an 8-bit microcontroller (MCU), pressure/temperature sensors, an X-axis + Z-axis or Z-axis accelerometer, and an RF transmitter
- Extremely low power consumption; the unique dual-axis accelerometer architecture enables the smallest possible module design, ideal for lightweight, space-constrained applications
- Flexible software development shortens time to market
- Ultra-compact QFN 7×7×2.2 mm package suits both external and internal mounting designs
Functional Block Diagram
