Overcurrent protection circuit and control method thereof
The invention discloses an overcurrent protection circuit and a control method thereof. The overcurrent protection circuit comprises a sampling circuit which is connected with a target object and is used for collecting the voltage of the target object to obtain a sampling voltage; the comparison cir...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses an overcurrent protection circuit and a control method thereof. The overcurrent protection circuit comprises a sampling circuit which is connected with a target object and is used for collecting the voltage of the target object to obtain a sampling voltage; the comparison circuit comprises a first comparison circuit and a second comparison circuit, the first comparison circuit is used for comparing the sampling voltage with a first reference voltage to obtain a first control signal, the second comparison circuit is used for comparing the sampling voltage with a second reference voltage to obtain a second control signal, and the second reference voltage is smaller than the first reference voltage; and the logic control circuit is connected to the output end of the comparison circuit and is used for outputting a protection signal according to the first control signal and the second control signal. The technical problem that in the prior art, when the working current of the transformer is |
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