Controlled power MOSFET switch-off circuit

Details Controlled power MOSFET switch-off circuit Controlled power MOSFET switch-off circuit

1993-01-07

1994-06-14

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307570, 307560, 307246, H03K 1728, H03K 1756

Patent

active

053213130

ABSTRACT:
An output circuit (15) includes an output transistor (16) driving a load (18) a phase 1 turn-off circuit (32), and a phase 2 turn-off circuit (34). A status circuit (28) is connected to both the phase 1 turn-off circuit (32) and the phase 2 turn-off circuit (34). Phase 1 turn-off circuit (32) and phase 2 turn-off circuit (34) provide a two phase turn-off when status circuit (28) identifies that output transistor (16) should be turned off which allows output transistor (16) to dissipate the energy stored in any inductance without output transistor (16) entering breakdown, therefore improving the circuit's (15) reliability and reducing both the energy and the increase of current in the output transistor (16).

REFERENCES:
patent: 3431467 (1966-11-01), Calfee
patent: 4149098 (1979-04-01), Wright
patent: 4543494 (1985-09-01), Wakimoto
patent: 4549095 (1985-10-01), Stefani et al.
patent: 4789796 (1988-12-01), Foss
patent: 4808839 (1989-02-01), Dunn et al.
patent: 4885486 (1989-12-01), Shekhawat et al.
patent: 4886985 (1989-12-01), Flohrs et al.
patent: 5045724 (1991-09-01), Ovens et al.
patent: 5144172 (1992-09-01), Palara et al.

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