Circuit arrangement for switching an inductive load
AssigneeRobert Bosch GmbH
InventorThoralf Rosahl
Life of this patent
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Abstract
Circuit arrangement for switching an inductive load, for example in clocked voltage regulators, includes a switching transistor which is operated in a high-side circuit and is connected to a free-running transistor in a half-bridge arrangement, with the inductive load to be switched positioned in a node between the switching transistor and the free-running transistor. The circuit arrangement also includes a driving circuit for the switching transistor. The switching transistor is connected to an auxiliary transistor in a current balancing arrangement, and the current balancing mode of the transistors can be controlled as a function of a potential present in the node.
Claims6
A circuit arrangement for switching an inductive load, comprising:
- a free-running transistor;
- a switching transistor operated in a high-side circuit and coupled to the free-running transistor in a half-bridge arrangement, the inductive load being coupled to a node between the switching transistor and the free-running transistor;
- a driving circuit coupled to the switching transistor;
- and
- an auxiliary transistor, the switching transistor being coupled to the auxiliary transistor in a current balancing arrangement, a current balancing mode of the switching transistor and of the auxiliary transistor being controlled as a function of a potential present in the node.
Dependencies are inferred from the claim text.