Power supply and apparatus and method for controlling link voltage control switch
AssigneeFairchild Korea Semiconductor Ltd.
InventorsSang Cheol Moon, Young-Bae Park
Life of this patent
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Abstract
A power supply includes a rectifier for rectifying an AC line voltage to generate a link voltage, a link capacitor for charging the link voltage, a control switch for controlling charge of the link capacitor, a converter for converting the link voltage to a DC voltage, and a switch controller. When the converter operates in a standby operation mode, the switch controller controls on-off of the control switch through a pulse signal having an on-time determined based on a peak value of a detected AC line voltage.
Claims20
An apparatus for controlling a control switch for controlling a link voltage of a power supply including a rectifier for rectifying an AC line voltage to generate the link voltage and a converter for converting the link voltage to a DC voltage, comprising:
- a line voltage detector for detecting the AC line voltage;
- and
- an on-time generator for generating a control signal for controlling the control switch through a pulse signal when the converter operates at a standby operation mode, the pulse signal having an on-time determined based on a peak value of a detected AC line voltage from the line voltage detector.
A method for controlling a control switch for controlling a link voltage of a power supply including a rectifier for rectifying an AC line voltage to generate the link voltage and a converter for converting the link voltage to a DC voltage, comprising:
- detecting the AC line voltage;
- determining an on-time based on a peak value of a detected AC line voltage;
- and
- generating a control signal for controlling the control switch through a pulse signal with the on-time when the converter operates in a standby operation mode.
A power supply, comprising:
- a rectifier for rectifying an AC line voltage to generate a link voltage;
- a link capacitor that is charged by the link voltage;
- a control switch for controlling charge of the link capacitor;
- a converter for converting the link voltage to a DC voltage;
- and
- a switch controller for controlling on-off of the control switch through a pulse signal when the converter operates in a standby operation mode, the pulse signal having an on-time determined based on a peak value of a detected AC line voltage.
Dependencies are inferred from the claim text.