Bidirectional current blocking MOSFET for battery disconnect swi

Details Bidirectional current blocking MOSFET for battery disconnect swi Bidirectional current blocking MOSFET for battery disconnect swi

1993-11-30

1996-07-16

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

257402, 257392, 257655, H01L 2978

Patent

active

055369774

ABSTRACT:
A bidirectional current blocking switch is disclosed. The switch includes a four-terminal MOSFET in which there is no source-body short. The voltages applied to the source and drain terminals are both higher than the voltage applied to the body terminal (for an N-channel) device so that the source-body and drain-body junction of the MOSFET never become forward-biased. The switch of this invention is particularly useful for switching a cascaded set of batteries in a portable computer.

REFERENCES:
patent: 4491750 (1985-01-01), Janutka
patent: 4595847 (1986-06-01), Weir
patent: 4639761 (1987-01-01), Singer et al.
patent: 4721986 (1988-01-01), Kinzer
patent: 5148043 (1992-09-01), Hirata et al.
patent: 5260594 (1993-11-01), Shimizu
patent: 5306961 (1994-04-01), Leo

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