Abstract: An image sensor package includes a substrate, an image sensor mounted on the substrate, a bonding wire connecting the image sensor to the substrate, a reflector disposed on the image sensor, a sealing member sealing the bonding wire and a portion of the image sensor, and covering at least a portion of the reflector, the sealing member including a hole exposing an effective imaging plane of the image sensor, and a filter attached to the sealing member.

Abstract: An image sensor package includes a substrate, an image sensor mounted on the substrate, a bonding wire connecting the image sensor to the substrate, a reflector disposed on the image sensor, a sealing member sealing the bonding wire and a portion of the image sensor, and covering at least a portion of the reflector, the sealing member including a hole exposing an effective imaging plane of the image sensor, and a filter attached to the sealing member.

Abstract: A power factor correction circuit includes an inductor, a power switch, and a power factor correction controller. The power factor correction controller receives information on an inductor voltage to control a switching operation of the power switch. The power factor controller estimates an input voltage according to the duty ratio of the power switch.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit refers to an inductor receiving an input voltage and supplying output power, a power switch connected to the inductor and controlling an inductor current flowing in the inductor, and an auxiliary coil coupled with the inductor with a predetermined turn ratio. The power factor correction circuit controls the output power by controlling a switching operation of the power switch, and counts the number of times that the inductor current reaches a predetermined maximum current to turn off the power switch when the count result reaches a predetermined short circuit threshold count.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit includes a power switch controlling an inductor current flowing in an inductor, an auxiliary inductor coupled to the inductor with a predetermined turn ratio, and a power factor correction controller controlling output power by controlling a switching operation of the power switch. The power factor correction controller determines whether or not an output voltage of the output power is an over-voltage by using the sum of a source current and a sink current that control a zero current detection voltage to be included within a predetermined clamping range, the zero current detection voltage corresponding to an auxiliary voltage that is a both-end voltage of an auxiliary inductor.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit receives an input voltage and maintains an output voltage at a constant level by controlling switching operation of a power switch connected to an inductor that supplies the output voltage. In this case, the power factor correction circuit controls switching operation of the power switch by differentiating a control structure for an output voltage respectively according to a stabilization period during which the output voltage is constantly maintained and a start-up period during which the output voltage is increased before being stabilized. In addition, the power factor correction circuit controls the switching operation of the power switch according to the control structure of the start-up period during a predetermined correction delay period from a time that the stabilization period starts.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit includes: an inductor for receiving an input voltage and supplying output power; a power switch connected to the inductor to control an inductor current flowing through the inductor; an auxiliary conductor coupled to the inductor with a predetermined turn ratio; and a power factor correction controller that controls the output power by controlling the switching operation of the power switch and determines whether or not the output voltage of the output power is an over-voltage.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit refers to an inductor receiving an input voltage and supplying output power, a power switch connected to the inductor and controlling an inductor current flowing in the inductor, and an auxiliary coil coupled with the inductor with a predetermined turn ratio. The power factor correction circuit controls the output power by controlling a switching operation of the power switch, and counts the number of times that the inductor current reaches a predetermined maximum current to turn off the power switch when the count result reaches a predetermined short circuit threshold count.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit includes: an inductor for receiving an input voltage and supplying output power; a power switch connected to the inductor to control an inductor current flowing through the inductor; an auxiliary conductor coupled to the inductor with a predetermined turn ratio; and a power factor correction controller that controls the output power by controlling the switching operation of the power switch and determines whether or not the output voltage of the output power is an over-voltage.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit includes a power switch controlling an inductor current flowing in an inductor, an auxiliary inductor coupled to the inductor with a predetermined turn ratio, and a power factor correction controller controlling output power by controlling a switching operation of the power switch. The power factor correction controller determines whether or not an output voltage of the output power is an over-voltage by using the sum of a source current and a sink current that control a zero current detection voltage to be included within a predetermined clamping range, the zero current detection voltage corresponding to an auxiliary voltage that is a both-end voltage of an auxiliary inductor.

Abstract: The present invention relates to a power factor correction circuit and a driving method thereof. The power factor correction circuit receives an input voltage and maintains an output voltage at a constant level by controlling switching operation of a power switch connected to an inductor that supplies the output voltage. In this case, the power factor correction circuit controls switching operation of the power switch by differentiating a control structure for an output voltage respectively according to a stabilization period during which the output voltage is constantly maintained and a start-up period during which the output voltage is increased before being stabilized. In addition, the power factor correction circuit controls the switching operation of the power switch according to the control structure of the start-up period during a predetermined correction delay period from a time that the stabilization period starts.

Abstract: The present invention relates to a power factor correction circuit and a power factor correction method. The present invention receives information on an output voltage of output power and information on an inductor voltage to control a switching operation of a power switch, and estimates the input voltage according to duty of the power switch.