Driver element for inductive loads

Details Driver element for inductive loads Driver element for inductive loads

1986-07-14

1988-11-08

James, Andrew J.

357 15, 357 36, H01L 2972, H01L 2948, H01L 2710

Patent

active

047836938

ABSTRACT:
This driver element for inductive loads, specifically DC motors, step motors, solenoids, and the like comprises a transistor bridge, each transistor of the bridge being parallel connected to a respective flyback diode ensuring recirculation of the current on switching the transistors off. The diodes are of the Schottky type, so as to ensure reduced switching loss and improved reliability of the element. The Schottky diodes are formed by leaving a non-diffused portion of the collector epitaxial layer through the base and emitter regions up to the device surface so as to contact the emitter metallization layer.

REFERENCES:
patent: 3909700 (1975-09-01), Ferro
patent: 4456920 (1984-06-01), Iesaka
patent: 4466175 (1984-08-01), Coe
patent: 4521795 (1985-06-01), Coe et al.

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