The non-profit CAN in Automation (CiA) has established a special interest group (SIG) for 48V transceiver testing whose scope is the development of specifications related to CAN-based and LIN-based networks in 48V supplied systems. This includes test plan specifications for 48V physical media attachment (PMA) sublayer implementations.
The automotive industry is moving towards the supply of passenger cars with a higher-voltage electrical system, a 48V system, rather than the traditional 12 V systems, offering thinner power supply cables and reducing wire harness weight. However, in-vehicle networks must handle higher-voltage shorts, and loss of ground (GND) is a concern. As a result, PMA sublayer components – such as PHYs, system base chips (SBCs) and standalone transceivers – must be designed to survive these conditions.
The CiA specifications will extend the existing requirements given in ISO 11898-2 (CAN) and ISO 17987-4 (LIN), and CiA will specify related test cases for 48V shorts and loss of GND.
The SIG is chaired by Marko Moch, working with Cariad, a VW Group member.
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