METHOD FOR CONTROLLING A POWER FACTOR CORRECTION CIRCUIT, POWER FACTOR CORRECTION CIRCUIT AND OPERATING DEVICE FOR AN ILLUMINANT
First Claim
1. A method for controlling a power factor correction circuit (11, 14;
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20) for an illuminant (3), the power factor correction circuit (11, 14;
20) having an inductance (21) coupled to an input, and a controllable switch (24) coupled to the inductance (21), in order optionally to charge and to discharge the inductance (21) by the closing and opening of the switch (24), wherein the method comprises;
selecting an operating mode for controlling the switching means (24) from a plurality of operating modes, andcontrolling the switch (24) in accordance with the selected operating mode, wherein in a first operating modea minimum waiting time (69) between the switching-off of the switch (24) and renewed switching-on of the switching means (24) is determined anda switch-on instant (68) for the switching means (24) is defined depending on the minimum waiting time (69) and depending on a voltage (66;
70) dropped across the switch (24).
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Accused Products
Abstract
For the purpose of power factor correction, an inductance (21) is supplied with an input voltage (Vin), wherein a controllable switching means (24) that is coupled to the inductance (21) is actuated in order to selectively charge and discharge the inductance (21). A control device (14) for actuating the switching means (24) is designed such that it actuates the switching means (24) selectively on the basis of one of a plurality of modes of operation. In a first mode of operation, a switch-on time is stipulated for the switching means (24) on the basis of a minimum waiting time and on the basis of a voltage that drops across the switching means (24).
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Citations
14 Claims
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1. A method for controlling a power factor correction circuit (11, 14;
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20) for an illuminant (3), the power factor correction circuit (11, 14;
20) having an inductance (21) coupled to an input, and a controllable switch (24) coupled to the inductance (21), in order optionally to charge and to discharge the inductance (21) by the closing and opening of the switch (24), wherein the method comprises;selecting an operating mode for controlling the switching means (24) from a plurality of operating modes, and controlling the switch (24) in accordance with the selected operating mode, wherein in a first operating mode a minimum waiting time (69) between the switching-off of the switch (24) and renewed switching-on of the switching means (24) is determined and a switch-on instant (68) for the switching means (24) is defined depending on the minimum waiting time (69) and depending on a voltage (66;
70) dropped across the switch (24). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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20) for an illuminant (3), the power factor correction circuit (11, 14;
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12. A power factor correction circuit (11, 14;
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20) for an illuminant (3), the power factor correction circuit (11, 14, 20) comprising
an inductance (21) coupled to an input of the power factor correction circuit (11, 14;
20), a controllable switching means (24) coupled to the inductance (21), anda control device (14) for controlling the switching means (24), in order optionally to charge and to discharge the inductance (21) by controlling the switch (24), wherein the control device (14) is configured to select an operating mode from a plurality of operating modes and to control the switch (24) in accordance with the selected operating mode, wherein the control device (14) is configured to determine in a first operating mode a minimum waiting time (69) between switching-off of the switching means (24) and renewed switching-on of the switch (24) and to define a switch-on instant (68) for the switch (24) depending on the minimum waiting time (69) and depending on a voltage (66;
70) dropped across the switch (24). - View Dependent Claims (13, 14)
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20) for an illuminant (3), the power factor correction circuit (11, 14, 20) comprising
Specification