Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1986-08-18
1988-02-23
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363134, H02M 3335
Patent
active
047274654
ABSTRACT:
This circuit, for reliably driving a load both in DC and AC mode with a low dissipation, comprises a pair of MOS power transistors, in a push-pull configuration, and a bootstrap circuit including a bootstrap capacitor placed between the source of the upper MOS transistor and a reference voltage point, through a first switch. A second switch is arranged between the supply line and the gate of the upper MOS transistor, while a third switch is arranged between the gate of the upper MOS transistor and the point common to the first switch and the bootstrap capacitor. During DC operation, the switches are open or closed in order to allow for the connection of the gate of the MOS power transistor to the supply voltage. During AC operation, the switches are controlled thereby, alternately the capacitor is charged at the voltage of the reference voltage point and the upper MOS transistor is held at a gate-to-source voltage sufficient to feed the load.
REFERENCES:
patent: 4550359 (1985-10-01), West
Cini Carlo
Diazzi Claudio
Rossi Domenico
Jones Judson H.
Josif Albert
Modiano Guido
Salce Patrick R.
SGS Microelettronica S.p.A.
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