More and more safety-critical automotive systems, such as EPS, are required to meet the requirements of ASIL-D, the highest automotive safety integrity level prescribed in ISO 26262, “Road Vehicles – Functional Safety.”

The new IC integrates key main functions, including 3-phase pre-driver circuits, fail-safe relay pre-driver circuits and motor current detection circuits, plus various failure detection circuits. An initial diagnosis circuit to detect latent faults in the failure detection circuits is also incorporated to secure higher functional safety.

Toshiba has also carried out a range of functional safety analyses to simulate various system failures and will provide customers with documentation, such as FMEDA, to support safety analysis and design.

Features:

－ Failure detection circuits for functional safety

－ Diagnosis circuit for failure detection circuits for functional safety

－ Built-in fail-safe relay pre-driver circuits

－ Under voltage operation

－ Pre-Driver operation is selectable on failures detection.