AC/DC CONVERTING CIRCUIT AND STARTING METHOD THEREOF
First Claim
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1. An AC/DC converting circuit, comprising:
- an AC/DC converting unit for converting an AC voltage into a DC voltage; and
an AC/DC power conversion controller coupled to the AC/DC converting unit, detecting the AC voltage or a rectified AC voltage, and then disabling the AC voltage detection or the rectified AC voltage detection when detecting that the AC voltage or the rectified AC voltage does not rise up to a start-up voltage after a power source voltage of the AC/DC power conversion controller rises up to a released voltage level of a voltage lockout.
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Abstract
An AC/DC converting circuit and a starting method thereof are provided. An AC detection or a rectified AC voltage detection is disabled when the AC voltage or the rectified AC voltage not up to a start-up voltage is detected, so as to shorten a recovery time of a voltage of a power supply terminal of an AC/DC power conversion controller, and further shorten a starting time of the AC/DC converting circuit.
60 Citations
9 Claims
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1. An AC/DC converting circuit, comprising:
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an AC/DC converting unit for converting an AC voltage into a DC voltage; and an AC/DC power conversion controller coupled to the AC/DC converting unit, detecting the AC voltage or a rectified AC voltage, and then disabling the AC voltage detection or the rectified AC voltage detection when detecting that the AC voltage or the rectified AC voltage does not rise up to a start-up voltage after a power source voltage of the AC/DC power conversion controller rises up to a released voltage level of a voltage lockout. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for starting an AC/DC converting circuit, comprising:
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detecting an AC voltage or a rectified AC voltage; determining whether the AC voltage or the rectified AC voltage is greater than or equivalent to a start-up voltage; disabling the AC voltage detection or the rectified AC voltage detection if the AC voltage or the rectified AC voltage is smaller than the start-up voltage; and starting the AC/DC converting circuit to perform AC/DC conversions so as to convert the AC voltage into the DC voltage if the AC voltage or the rectified AC voltage is continuously greater than or equivalent to the start-up voltage for a predetermined period of time.
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Specification