Control method and control circuit for power factor correction circuit
AssigneeLite-On Technology Corporation
InventorPo-Ming CHEN
Life of this patent
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Abstract
A control method and a control circuit for a power factor correction (PFC) circuit are provided. The control method for the PFC circuit includes the following steps. Whether a recoverable protection action is occurred or stopped is determined. During the recoverable protection action, a count value is counted. When the recoverable protection action is stopped, a discharge current of an output capacitor of the PFC circuit is analyzed at least according to the count value. An output voltage controller is updated according to the discharge current.
Claims18
A control method for a power factor correction (PFC) circuit, comprising:
- determining whether a recoverable protective action is occurred or stopped;
- counting a count value during the recoverable protective action;
- analyzing a discharge current of an output capacitor of the PFC circuit at least according to the count value when the recoverable protection action is stopped;
- and
- updating an output voltage controller according to the discharge current.
A control circuit for a power factor correction (PFC) circuit, comprising:
- a protection determination unit, used to determine whether a recoverable protective action is occurred or stopped;
- a counting unit, used to count a count value during the recoverable protective action;
- an analysis unit, used to analyze a discharge current of an output capacitor of the PFC circuit at least according to the count value when the recoverable protection action is stopped;
- and
- an updating unit, used to update an output voltage controller according to the discharge current.
A control circuit for a power factor correction (PFC) circuit, wherein the control circuit is connected to the PFC circuit, the control circuit is used to execute a control method for the PFC circuit, and the control method comprises:
- determining whether a recoverable protective action is occurred or stopped;
- counting a count value during the recoverable protective action;
- analyzing a discharge current of an output capacitor of the PFC circuit at least according to the count value when the recoverable protection action is stopped;
- and
- updating an output voltage controller according to the discharge current.
Dependencies are inferred from the claim text.