Toshiba Electronics Europe recently announced a general-purpose system power IC with multiple outputs and functional safety circuits for automotive applications. The TB9044FNG comes in an HTSSOP48-P-300-0.50 package measuring 6.1 mm × 12.5 mm × 1 mm. It integrates various failure-detection functions (e.g., a high-voltage and low-voltage detection and overheat detection) and a watchdog timer to monitor the failure detection of the external microcontroller. Also included is an initial diagnosis circuit to detect latent faults in the failure detection circuits to secure higher functional safety.
The IC generates a 6-V output from a high-efficiency buck-boost DC-DC converter. In order to avoid problems following a voltage drop during cranking, the low-side operating voltage range is improved down to 2.7 V (minimum) with battery operation. In addition, the IC incorporates four series power supply output circuits receiving the 6-V input generated by the DC-DC converter. It also incorporates an output circuit with a 5-V constant voltage (current capacity of 400 mA) for the microcomputer, and three circuits with 5-V constant voltage output (current capacity of 100 mA) for sensors and other interfaces. Each can output a voltage independently.
Samples are now available. Mass production scheduled to begin in October 2017.
Source: Toshiba Corp.
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