Automotive electric motor pre-driver supports ASIL-D protection

July 24, 2014 // By Graham Prophet
Toshiba Electronics Europe (TEE) has a motor pre-driver IC for automotive applications, especially electric power steering (EPS) systems, where safety is of paramount importance. The TB9052FNG is suitable for use in systems adhering to ASIL-D, the highest automotive safety integrity level prescribed in functional safety standard ISO 26262.

In addition to the main pre-driver circuit, TB9052FNG incorporates various failure detection circuits for functional safety. Elements included are battery under-voltage detection, over-temperature and driver short detection circuits.

The TB9052FNG pre-driver IC has four channels: two high side and two low side, and includes a charge pump solely to drive N-channel MOSFETs. It is contained in a HTSSOP48-P-300-0.50 package measuring 12.5 x 6.1 x 1.2 mm. Operating voltage range is +6 to 18V and operating temperature range is from -40 to +125C. Sample shipments will start in August, with mass production scheduled to start in March, 2015. Toshiba will also be supplying associated safety analysis documentation.