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NXP rolls automotive-grade isolated CAN transceiver

Posted: 25 Mar 2013 ?? ?Print Version ?Bookmark and Share

Keywords:CAN transceiver? galvanic isolation? H/EV? electric vehicle?

NXP Semiconductors N.V. has announced what it says is a high-speed controller area network (CAN) transceiver with integrated galvanic isolation technology. The TJA1052i is the first ISO11898-2 compliant product of its kind to offer this level of integration at AEC-Q100 automotive grade quality, boasted the company.

The TJA1052i is an excellent choice for all types of CAN networks where high- and low-voltage networks co-existsuch as in electric and hybrid vehiclesand require galvanic isolation for safety reasons. Adding isolation to the CAN transceiver significantly simplifies the design effort to safely bridge between high and low voltage levels. It also provides protection against electric shocks, over-voltage, ground offset and reverse current, while significantly improving signal integrity in noisy electromagnetic environments, NXP added.

By integrating an existing market accepted CAN transceiver with a galvanic isolator in one package, the solution ensures matching dynamic parameters, reduces board space, improves signal performance, and increases overall reliability and cost-effectiveness.

The TJA1052i is geared for the growing market of hybrid and full electric vehicles (H/EVs), where high and low voltage levels co-exist. H/EVs are equipped with multiple battery modulestypically controlled via CAN by the battery management systemwhich together can supply up to 500V and also power other high-voltage applications such as inverter, start/stop, DC/DC converter, charger and air conditioning systems. These systems need to communicate with other electronic control units (ECUs) via the CAN Bus, and are typically operated from the 12V board net.

Isolated CAN products are also needed in industrial applications where ECUs controlling high voltage applications and other ECUs need to be connected to each other via the CAN bus. Application examples for the TJA1052i in non-automotive areas are industrial equipment, energy storage systems, building automation and H/EV charging stations.

The TJA1052i is ramping up in production with immediate effect.





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