TLE925x CAN FD transceivers achieve transmission rates of up to 5 Mbit/s

Today, approximately 60 electronic control units (ECUs) communicate with each other in automobiles using the Controller Area Network (CAN). As networking accelerates and convenience and automation capabilities increase, the demand for in-vehicle communication is growing.

A revised version of this protocol, CAN Flexible Data (CAN FD), enables higher data bandwidth and transmission speeds. This protocol reduces the time required for programming, testing, diagnostic routines, and software updates over the air (SOTA).

Using Infineon's TLE925x CAN FD transceivers, data exchange can be up to 30 times faster than currently possible. The TLE925x achieves transmission rates of up to 5 Mbit/s. Compared to conventional CAN transceivers with a maximum payload of 8 bytes, CAN FD transceivers like the TLE925x can transmit up to 64 bytes of payload per message.

This allows for a 21-bit checksum, rather than the previously available 17-bit, to verify that transmitted data matches the transmitting control device. Using a longer checksum ensures reliable communication between control devices. This allows for more reliable data transmission without the need for complex ECU application software.

The TLE925x CAN FD transceivers are ideal for applications such as body control modules and gateways, power steering, engine and transmission control units, and radar- and camera-based driver assistance systems. Today, the average car uses 17 CAN transceivers, a number expected to increase to more than 20 within the next five years.

The TLE925x CAN FD transceivers support interface voltages of 3.3 V and 5 V with a microcontroller, enabling optimal signal symmetry. The more symmetrical the signal, the better the electromagnetic compatibility (EMC). Furthermore, compared to previous CAN generations, Infineon has improved the EMI robustness of the CAN FD transceivers with a standard frequency range of 1 MHz to 1 GHz.

The TLE925x's electromagnetic emission (EME) range is 150kHz to 1GHz, which is lower than that of other CAN transceivers. Furthermore, these CAN FD transceivers passed the ?8kV electrostatic discharge (ESD) test according to IEC61000-4-2.

Infineon offers a comprehensive range of transceiver products for various bus segments, including CAN FD, CAN with Partial Networking, High-Speed CAN, LIN, and FlexRay. For CAN FD at 5 Mbit/s, the TLE9278 Multi-CAN Power-SBC family is available as a system basis chip (SBC) along with the TLE925x transceiver, which meets ISO11898-2:2016. The TC3xx multicore microcontrollers from the AURIX™ family offer up to 12 CAN FD channels according to ISO11898-1:2015.