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CAN FD system basis chips support up to 5 mbps

CAN FD system basis chips support up to 5 mbps

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By Christoph Hammerschmidt



A system basis chip is the central component for the power supply and communication of the microcontroller in electronic control units of vehicles. SBCs combine power supplies, communication bus interfaces (CAN, LIN) and monitoring functions on one chip. The integration of these three essential functions on one chip reduces system costs and space requirements by up to 80 percent compared to discrete solutions.

The new Lite SBC series from Infineon is optimized for low system costs. It integrates a CAN transceiver and addresses numerous applications such as wireless charging in the vehicle, nitrogen oxide sensors, gear levers and light control. The more powerful Mid-Range+ devices integrate one CAN and up to two LIN transceivers. Thus, comfort functions and gateway modules can also be supported.

Current developments in the automotive industry require ever faster communication. Originally, the CAN FD protocol was designed for software updates during production or maintenance. In the meantime, communication in the vehicle and with the outside world also requires a higher bandwidth and larger amounts of data. One example: sophisticated matrix LED headlamps process large amounts of data from camera systems and sensors.

In addition to fast communication, the new SBCs also enable lower power consumption. The Partial Networking function reduces power consumption by putting the ECU into sleep or stop mode when not in use. In addition, the Lite SBC family has a charge pump to drive n-channel power MOSFETs on the high side. This allows, for example, the connection to an external load to be disconnected during sleep mode and the quiescent current to be further reduced.

All components of the new SBC family have diagnostic and monitoring functions to support safety concepts for the ECUs. These include undervoltage monitoring, a window watchdog with reset function, fail-safe mode and a fail-safe output. With the Mid-Range+ family, external loads can also be controlled with four high-side switches.

Infineon’s new SBCs are software compatible with other Infineon SBC families such as the DCDC and Multi-CAN Power SBC series (TLE94x1, TLE926x and TLE927x).

The Mid-Range+ family is already available, while the Lite SBC variants will be available from October 2018.

More information www.infineon.com/SBC

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