Hybrid linear-switching power supply

Details Hybrid linear-switching power supply Hybrid linear-switching power supply

1992-07-10

1994-05-03

Stephan, Steven L.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323273, 323282, G05F 1563

Patent

active

053090829

ABSTRACT:
A hybrid regulator incorporates both linear and switching-type regulator circuits. While such a combination may at first be thought undesirable as simply compounding the flaws of one design with the flaws of the other, in fact the present design is well suited for many applications. In the preferred embodiment, the linear and switching circuits are cascaded. The switching circuit runs in open-loop fashion--without adaptive control. However, a feedback signal is derived from the output of the switching circuit and is used to control the linear regulator, effecting net control of the entire circuit. In this manner, a simple, low cost power supply is provided that provides the excellent regulation and simple over-current protection characteristic of a linear supply, together with the boost capabilities of switching topologies.

REFERENCES:
patent: 4292581 (1981-09-01), Tan
patent: 4502152 (1985-02-01), Sinclair
patent: 4679130 (1987-07-01), Moscovici
patent: 4881023 (1989-11-01), Perusse et al.
patent: 4893228 (1990-01-01), Orrick et al.
patent: 4972136 (1990-11-01), Banura
patent: 5083078 (1992-01-01), Kubler et al.
patent: 5216353 (1993-06-01), Mori
Meyer, Fred, "Switched-Mode Power Supplies," The ARRL Handbook for Radio Amateurs, Published by the American Radio Relay League, 1991, 68th Ed., pp. 6-25-6-35.

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