Over current protection apparatus
First Claim
Patent Images
1. An over-current protection apparatus comprising:
- a current sensor configured to transform input current into a voltage signal, and output the voltage signal;
an over-current sensing unit driven according to the voltage signal output from the current sensor; and
an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit,wherein the over-current determination unit includes;
a logic device configured to receive a signal output via an output terminal of the over-current sensing unit, as a first input signal; and
a delayer circuit configured to delay the output signal of the over-current sensing unit for a predetermined time, and provide the delayed output signal as a second input signal to be supplied to the logic device.
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Abstract
Provided is an over-current protection apparatus including a current sensor configured to transform input current into a voltage signal, and output the voltage signal; an over-current sensing unit driven according to the voltage signal output from the current sensor; and an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit.
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Citations
20 Claims
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1. An over-current protection apparatus comprising:
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a current sensor configured to transform input current into a voltage signal, and output the voltage signal; an over-current sensing unit driven according to the voltage signal output from the current sensor; and an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit, wherein the over-current determination unit includes; a logic device configured to receive a signal output via an output terminal of the over-current sensing unit, as a first input signal; and a delayer circuit configured to delay the output signal of the over-current sensing unit for a predetermined time, and provide the delayed output signal as a second input signal to be supplied to the logic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An over-current protection apparatus comprising:
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a current sensor configured to transform input current into a voltage signal, and output the voltage signal; a first over-current control circuit connected between a first switching unit and the current sensor; and a second over-current control circuit connected between a second switching unit and the current sensor; wherein each of the first and the second over-current control circuits comprises an over-current sensing unit driven according to the voltage signal output from the current sensor and an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit, wherein each over-current determination unit includes a logic device that directly receives a signal output from the output terminal of its corresponding over-current sensing unit. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An over-current protection apparatus comprising:
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a current sensor configured to transform input current into a voltage signal, and output the voltage signal; a first over-current control circuit configured to control a first switching unit by detecting whether over-current is generated in a forward current path of the current sensor; and a second over-current control circuit configured to control a second switching unit by detecting whether over-current is generated in a backward current path of the current sensor, wherein each of the first and the second over-current control circuits comprises an over-current sensing unit driven according to the voltage signal output from the current sensor and an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit, wherein each over-current determination unit includes; a logic device configured to receive a signal output via an output terminal of the over-current sensing unit, as a first input signal; and a delayer circuit configured to delay the output signal of the over-current sensing unit for a predetermined time, and provide the delayed output signal as a second input signal to be supplied to the logic device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification