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Toshiba launches general-purpose system power IC with multiple outputs for automotive functional safety

Toshiba Electronic Devices & Storage Corporation has launched a general-purpose system power IC with multiple outputs achieving functional safety for automotive applications. The new IC TB9045FNG is available in four versions, with output voltages ranging from 1.1V to 1.5V. Mass production is scheduled to start this month.

More and more safety-critical automotive systems, such as electric power steering (EPS) and braking, are required to meet the requirements of ASIL-D, the highest automotive safety integrity level prescribed in the ISO 26262 functional safety standards.

The new IC integrates various failure detection functions, such as high-voltage and low-voltage detection, overheat detection, and frequency monitoring of power supply circuit, to monitor against the IC’s own failure, and a watchdog timer to monitor failure detection of the external microcontroller. 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 system failures and will provide customers with documentation, such as functional safety FMEDA, to support overall safety analysis and design.

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