For safety-critical systems, the integrated diagnostic operation can be verified under control of the serial interface. Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most shortcircuit conditions. The external power MOSFETs are protected from shoot-through by programmable dead time. The full bridge can be controlled by independent logic level inputs or through the SPI-compatible serial interface.

A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs. The A3924 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a full-bridge (H-bridge) arrangement and is specifically designed for ASIL automotive applications with high-power inductive loads, such as brush DC motors, solenoids and actuators. Full ISO-26262 documentation is available to assist safety critical applications to achieve ASIL-D certification.Ī unique charge pump regulator provides the programmable gate drive voltage for battery voltages down to 7 V and allows the A3924 to operate with a reduced gate drive, down to 5.5 V.