FEED FORWARD IMBALANCE CORRECTOR CIRCUIT
First Claim
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1. A circuit comprising:
- an input to be coupled to receive a rectified line voltage having a controlled conduction phase angle in each half line cycle;
an active device coupled to a feedback terminal of a controller, wherein the feedback terminal is coupled to receive a feedback signal representative of an output of a power supply, wherein the active device includes a control terminal coupled to receive a signal representative of the input, wherein the active device is coupled to adjust the feedback signal on the feedback terminal in response to the control of the conduction phase angle of the rectified line voltage in each half line cycle.
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Abstract
A circuit includes an input to be coupled to receive a rectified line voltage having a controlled conduction phase angle in each half line cycle. An active device is coupled to a feedback terminal of a controller. The feedback terminal is coupled to receive a feedback signal representative of an output of a power supply. The active device includes a control terminal coupled to receive a signal representative of the input. The active device is coupled to adjust the feedback signal on the feedback terminal in response to the control of the conduction phase angle of the rectified line voltage in each half line cycle.
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Citations
17 Claims
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1. A circuit comprising:
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an input to be coupled to receive a rectified line voltage having a controlled conduction phase angle in each half line cycle; an active device coupled to a feedback terminal of a controller, wherein the feedback terminal is coupled to receive a feedback signal representative of an output of a power supply, wherein the active device includes a control terminal coupled to receive a signal representative of the input, wherein the active device is coupled to adjust the feedback signal on the feedback terminal in response to the control of the conduction phase angle of the rectified line voltage in each half line cycle. - View Dependent Claims (2, 3, 4, 5)
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6. An LED driver comprising:
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a rectifier to be coupled to receive a line voltage having a controlled conduction phase angle in each half line cycle and to output a rectified signal; a power supply coupled to receive the rectified signal and provide an output to one or more LEDs, the power supply including a controller coupled to regulate the output in response to a feedback signal representative of the output, wherein the controller is coupled to receive the feedback signal at a feedback terminal; a compensation circuit coupled to the rectifier and the controller, the compensation circuit coupled to the feedback terminal of the controller, wherein the compensation circuit is coupled to receive a signal representative of the rectified signal, wherein the compensation circuit is coupled to adjust the feedback signal on the feedback terminal in response to the control of the conduction phase angle of the line voltage in each half line cycle. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for providing a regulated current to one or more LEDs, comprising:
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receiving a line voltage having a controlled conduction phase angle in each half line cycle; rectifying the line voltage to output a rectified signal; providing the rectified signal to an input of a power supply; providing from the power supply the regulated current to the one or more LEDs coupled to an output of the power supply, wherein the power supply is coupled to regulate the regulated current in response to a feedback signal representative of the output of the power supply; and adjusting the feedback signal in each half line cycle in response to the controlled conduction phase angle of the line voltage. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification