Dropper type regulator
AssigneeSanken Electric Co., Ltd.
InventorHiroshi Usui
Life of this patent
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Abstract
A dropper type regulator of the invention, in which a semiconductor device is connected in series between a DC power supply and a voltage output terminal, extracts a second voltage from the first voltage of the DC power supply; when the driving voltage of the semiconductor device is detected as being larger than a preset first threshold value, the voltage difference occurring between the input and output terminals of the semiconductor device is detected, and when this voltage difference is detected as being larger than a second threshold value, an overload protection circuit performs overload protection.
Claims8
A dropper type regulator comprising:
- a semiconductor device provided with input and output terminals connected to a DC power supply and to a voltage output terminal, respectively;
- a first comparator which compares a driving voltage supplied to a control terminal of said semiconductor device with a first predetermined threshold value so as to output a first detection signal when said driving voltage is higher than said first threshold value;
- a second comparator which compares the voltage difference occurring between the input and output terminals of said semiconductor device with a second predetermined threshold value so as to output a second detection signal when said voltage difference is greater than said second threshold value;
- and,
- an overload protection circuit which performs overload protection when said first comparator outputs said first detection signal and said second comparator outputs said second detection signal.
A dropper type regulator comprising;
- a semiconductor device provided with input and output terminals connected to a DC power supply and to a voltage output terminal, respectively;
- a converter which detects a driving voltage supplied to a control terminal of said semiconductor device, and generates a reference voltage which changes according to the value of said driving voltage;
- a comparator which compares the voltage difference occurring between the input and output terminals of said semiconductor device with said reference voltage output by said converter so as to output a detection signal when said voltage difference is greater than said reference voltage;
- and,
- an overload protection circuit which performs overload protection when said comparator outputs said detection signal.
Dependencies are inferred from the claim text.