At the Ludwigsburg Automotive Electronics congress past June, a number of OEMs including Audi, BMW, Daimler, GM and Volkswagen have announced to equip future vehicle generations with a split-voltage power supply - 12V for infotainment, lighting and many driver assistant systems and 48V for power steering, kinetic energy recuperation, and HVAC. This move helps to reduce weight and space requirements for cars with electric and hybrid drive, the OEMs argued.
Fig. 1: Potential application fields for 48V supply in the car
The FlexRay transceivers introduced by NXP now are joining this trend. They support the 48V supply even without requiring external decoupling components. According to Lars Reger, Vice President Automotive R&D at NXP, they also feature excellent ESD robustness and at the same time very low power consumption. This is owed to NXP's proprietary ABCD3/9 semiconductor manufacturing process, Reger said. This process combines high-voltage resistance with high digital density.
As the first member of the new FlexRay transceiver family, NXP introduced the TJA1081B. The device which will be available from Q2, 2012, integrates a voltage regulator and a sleep function. It also features a seamless undervoltage specification and optimized electromagnetic compatibility. It is designed to support FlexRay version V3.0.1. In order to serve Japanese markets, it also is compatible with the Japanese flavor of FlexRay, Jaspar. Two other FlexRay transceiver ICs will follow later this year.
For more information visit http://www.nxp.com/products/interface_and_connectivity/transceivers/flexray_transceivers/