ROHM’s Power Supply Monitoring IC has Built-In Self-Diagnostics

July 1, 2019 Alix Paultre

ROHM announced the availability of the 3mm square BD39040MUF-C power supply monitoring IC, with BIST (Built-In Self Test) that supports functional safety. The BD39040MUF-C is a power monitoring IC that provides monitoring functions required for functional safety in the power supply systems of ADAS sensor modules. Offering voltage monitoring functions (Power Good, reset) and a watchdog timer for monitoring the ECU essential for functional safety, the device makes it possible to detect potential failure of the power supply IC itself without affecting existing systems.

The watchdog timer for ECU can be adjusted via external resistance and the effective monitoring timing arbitrarily set to ON/OFF. The BD39040MUF-C incorporates a range of monitoring functions, including overvoltage and undervoltage monitoring (Power Good) required for power supplies, and watchdog timer and reset functions demanded by ECUs. Among these, the watchdog timer is a window-type that monitors whether the ECU is stuck in a loop within a programmable timeout period.

Learn more at www.rohm.com/eu.

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