Integrated circuit comprising a unit for controlling a load of a

Details Integrated circuit comprising a unit for controlling a load of a Integrated circuit comprising a unit for controlling a load of a

1993-02-26

1995-03-14

Stephan, Steven L.

Electricity: power supply or regulation systems

Output level responsive

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

323265, 323270, G05F 140, G05F 144

Patent

active

053979770

ABSTRACT:
An integrated circuit having a unit for controlling a load of an inductive nature, which unit includes a first output transistor having a first control electrode and a first main current path, a second output transistor having a second control electrode and a second main current path, a control stage coupled to the control electrodes and adapted to control the output transistors. An output terminal is coupled between the main current paths and adapted to connect the load. In order to limit a voltage transient appearing on the output terminal, as a result of an interruption of a current flowing through the load, the control stage is coupled to the output terminal and is adapted to detect a first voltage transient on the output terminal, to turn on the second transistor in response to the first voltage transient, to detect a second voltage transient on the output terminal, which second voltage transient is opposed to the first voltage transient, and to turn off the second transistor in response to the second voltage transient.

REFERENCES:
patent: 4234841 (1980-11-01), Schade, Jr.
patent: 4884160 (1989-11-01), Pasquarella
patent: 4924158 (1990-05-01), Kelley et al.
patent: 5134537 (1992-07-01), Buss et al.
"Brushless DC Motor Drive Circuit", Philips TDA 5140, Jun. 1989.

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