Passively forced current sharing among transistors

Details Passively forced current sharing among transistors Passively forced current sharing among transistors

1990-06-27

1991-10-15

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307242, 307254, 307 60, 330275, 330277, H03K 1760, H03K 1756, H02J 104, H03F 326

Patent

active

050577190

ABSTRACT:
This application concerns a simple passive circuit that improves current balance in paralleled power MOSFETs that are not precisely matched and that are operated in their active region from a common gate drive. A nonlinear circuit consisting of diodes and resistors generates a differential gate potential required to correct for unbalance while maintaining low losses over a range of current.

REFERENCES:
patent: 4618779 (1986-10-01), Wiscombe
patent: 4634892 (1987-01-01), Isbell et al.
patent: 4675561 (1987-06-01), Bowers
patent: 4779060 (1988-10-01), Henden
patent: 4929907 (1990-05-01), Berkel
Delaney, "Electronics for the Physicist", 1969, pp. 1-47.
James Forsythe Techniques for Controlling Dynamic Current Balance in Parallel Power MOSFET Configurations, Proceedings of Powercon 8 G-3, pp. 1-11, Power Concepts, Inc., 1981.
Technical Info Center Power MOSFET Transistor Data, Motorola, Inc., 1988, pp. 2-7-2 through 2-7-23 and Misc.

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