Automotive Power

TLE 826x - New System Basis Chip Family

TLE 826x SBC family block diagram

Infineon has introduced a new family of System Basis Chips (SBC). It is released at many OEMs including VW, Audi, Daimler and Ford and is in volume production. The SBC works together with the microcontroller and the power drives on an ECU. The devices are typically used in automotive body electronics but are also suited to other automotive applications. To support these applications, the SBC family provides one high-speed CAN transceiver and multiple LIN transceivers for data transmission. The number of LIN transceivers varies from one family member to another. One of the integrated low-dropout (LDO) voltage regulators supplies the microcontroller and another one supplies the CAN transceiver or other functions on the module. For extended power requirements, a PNP transistor can be added to generate a third voltage regulator.

The voltage regulators and the whole SBC are optimized for low power consumption. The chip communicates with the microcontroller via a 16-bit serial peripheral interface. Features include a time-out watchdog, window watchdog and undervoltage reset. The limp home outputs drive certain functions in the event of failure. The SBC family reduces the Bill of Material (BOM) and board space. It also reduces the current consumption of the PCB during low-power mode and adds safety features to the system.

High-speed CAN transceiver Good ESD and EMC performance (8 KV ESD) Voltage regulator with external pass transistor (5 V/400 mA)

Automotive body controllers Automotive ECUs: HVAC, seat, steering column, door, AFS systems