Electronic circuit device
AssigneeRobert Bosch GmbH
InventorsGerhard Conzelmann, Dietmar Haack, Gerhard Fiedler
Life of this patent
Estimating the term…
Abstract
An electronic circuit device having a monolithic integrated power transistor is disclosed that comprises a parallel connection of a plurality of individual partial transistors (1, 2, 3, . . . , n). In order to stabilize the distribution of the sum current to the individual partial transistors (1, 2, 3, . . . , n) resistors (41, 42, 43, . . . 4n) are provided in their emitter lines. At least one of the resistors (41, 42, 43, . . . 4n) in the emitter lines of the partial transistors (1, 2, 3, . . . , n) serves as measurement resistor for producing a signal voltage proportional to the current to provide an electronic circuit device having current regulation or current limiting, as shown in FIG. 2.
Claims32
An integrated electronic circuit device including a monolithic integrated bipolar power transistor, said device comprising:
- a plurality of individual, parallel-connected partial transistors (1, 2, 3, . . . , n), each partial transistor having an emitter, a base, and a collector, having resistors (41, 42, 43, . . . , 4n) connected between their respective emitters and a common emitter line providing the emitter connection for said parallel-connected partial transistors, said resistors stabilizing the distribution of a sum current to the individual parallel-connected partial transistors (1, 2, 3, . . . , n) in the power transistor;
- and
- circuit means connected to a node formed by the connection of at least one of said resistors and the corresponding emitter, said circuit means providing a voltage signal proportional to a current flowing through said at least one of said resistors, said voltage signal being provided to means for providing current regulation or current limiting of a power transistor output.
Dependencies are inferred from the claim text.