Dual high-side switch is protected and qualified for automotive use

Called BV2HD045EFU-C, the part is AEC-Q100 Grade 1 qualified and includes numerous protection functions include thermal protection that detects both when the control circuit is too hot, and if the output mosfets are much hotter than the control circuit. The load is re-connected after the thermal fault condition has cleared.

In-rush current to the chip is limited to 21A, while steady state output over-current detection canbe set independently for the two channels between 1A and 10A. An optional capacitor sets a time delay on output over-current detection.

To detect open-circuit loads, the chip includes a sensing circuit to work with an external high-side load series resistor. Yet another circuit detects if the chip’s ground connection has gone open-circuit and the load is automatically disconnected.

Active output clamps are provided to protect the chip against transients from inductive loads.

There is an interface for an external host microcontroller for control and status reporting. The data sheet (which does not appear to be released generally yet) suggests a method to prevent faults on the power switching side from damaging the MCU.

The part can be powered from rails between 6V and 28V.

A second part, BV2HC045EFU-C, operates across 6V to 19V, and latches off after a thermal upset.