IT has built-in isolation designed to meet Automotive Safety Integrity Level (ASIL) requirements in applications such as electronic power steering, electric braking, and three-phase relay drivers.

The new A²-SIL replaces mechanical relays and discrete driver circuits in safety-critical automotive applications where motor isolation is an essential requirement. The A6861 has three independent floating gate drive outputs to maintain the power MOSFETs in the On or Off state over the full supply range in the presence of high phase-voltage slew rates. With the addition of a few external components, it can also isolate the load when high load currents are present. An integrated charge pump regulator provides the battery supply voltage necessary to maintain the power MOSFETs in the On state continuously when the phase voltage is equal to the battery voltage. The charge pump will maintain sufficient gate drive (above 7.5V) for battery voltages down to 4.5V with 100kΩ gate-source resistors. The three gate drives can be independently controlled. In typical applications the MOSFETs will be switched on within 8μs and will switch off within 1 μs. An under-voltage monitor checks that the pumped supply voltage is high enough to ensure that the MOSFETs are maintained in a safe conducting state.