Load driving device and method for controlling load driving device

Abstract

Provided is a highly reliable load driving device including a plurality of booster circuits connected in parallel, where even when some booster circuits fail while protecting components of the booster circuits, another normal booster circuit can continue the boosting operation. A load driving device includes a first booster circuit; a second booster circuit connected in parallel to the first booster circuit; a first current cutoff circuit disposed on an upper stage side of the first booster circuit; a second current cutoff circuit disposed on a lower stage side of the first booster circuit; a third current cutoff circuit disposed on an upper stage side of the second booster circuit; a fourth current cutoff circuit disposed on a lower stage side of the second booster circuit; and a calculation device configured to calculate a control command for controlling the first booster circuit and the second booster circuit, in which when a failure of the first booster circuit is detected, the calculation device causes the first current causes circuit to cut off a current from a power supply to the first booster circuit, and changes a current set value of the second booster circuit to be lower than that before the failure to operate the second booster circuit.

Dependencies are inferred from the claim text.