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Car networking sol'n activates selective ECUs

Posted: 25 Aug 2011     Print Version  Bookmark and Share

Keywords:CAN  Partial Networking  electronic control unit  fuel consumption 

NXP Semiconductors N.V. launches a stand-alone TJA1145 CAN transceiver and system basis chip UJA1168 with 5V/100mA MCU supply, giving design engineers precision control over a vehicle's bus communication network.

The networking solutions are touted as the first NWP ISO 11898-6 and AUTOSAR R3.2.1 compliant solution supporting CAN Partial Networking.

With growing concerns over technologies that harm the environment, engineers have found a way to reduce vehicle fuel consumption and CO2 emissions while maintaining the level of performance and consumer experience. The CAN Partial Networking intelligently activates only the electronic control units (ECUs) that are functionally required, while the other ECUs remain in a low-power mode until needed.

Looking at in-vehicle networking architectures, all ECUs are always active and consuming power when the vehicle is in use. This is the case even if the applications they control aren't continuously required, such as seat positioning, sun roof operation and window lifting. The solution equates to significant savings in power consumption, cost, wiring and CO2 emissions. CAN Partial Networking is also extremely beneficial for electric and hybrid vehicles as it helps extend their operating range and optimises charging time.

TJA1145 and UJA1168 are next-generation networking solutions that combine analogue circuitry and high-density digital circuits. Both support CAN Partial Networking by enabling 'selective wake-up' and 'selective sleep' functionality. They come with a small footprint based on the HVSON14 package. For backward compatibility, the TJA1145 is also available in the SO14 package. Engineering samples for TJA1145 and UJA1168 are available with volume shipping in 2012.

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