Circuit for the protection against overcurrents in power electro

Details Circuit for the protection against overcurrents in power electro Circuit for the protection against overcurrents in power electro

1996-12-23

1998-06-09

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 79, 361 86, 361 97, 323277, H02H 700

Patent

active

057644608

ABSTRACT:
A circuit for protecting from overload currents includes an electronic power device having at least first and second terminals and at least one control terminal. The circuit also includes at least one voltage-generating circuit for generating a reference voltage having a predetermined pattern. The voltage-generating circuit includes at least a first terminal connected to the first terminal of the power device and at least a second terminal coupled to the second terminal of the power device through a sensor. The circuit also preferably includes at least one comparator for comparing the reference voltage with a voltage present across the sensor. The comparator has at least one output terminal and at least first and second input terminals. The first and second input terminals are respectively connected to a third terminal of the voltage-generating circuit and the second terminal of the power device. The circuit also includes at least one current limiter having at least a first terminal connected to the control terminal of the power device, at least a second terminal connected to the second terminal of the voltage-generating circuit, and at least one control terminal connected to the output terminal of the comparator.

REFERENCES:
patent: 5025203 (1991-06-01), Edwards
patent: 5091818 (1992-02-01), Morikawa et al.
patent: 5210481 (1993-05-01), Brambilla et al.

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