Wall mounted AC to DC converter gang box
First Claim
Patent Images
1. An LED driver comprising:
- a power converter disposed in a one-gang box to receive an AC mains voltage and to output a DC output voltage for driving an LED device, the power converter comprising;
a rectifier to receive the AC mains voltage and convert the AC mains voltage into a DC input voltage;
a power factor correction (PFC) converter stage to receive the DC input voltage, perform power factor correction, and generate a first stage voltage; and
a resonant converter stage to receive the first stage voltage and generate an output voltage;
a dimmer input disposed within the one-gang box to vary a level of the DC output voltage; and
a main controller, wherein;
the PFC converter stage is to generate the first stage voltage at a level, the level of the first stage voltage based on a control voltage,the main controller is to receive the output voltage and to generate the control voltage based on the output voltage, andthe resonant converter stage is configured to operate at a fixed frequency with a fixed duty cycle and dead time when the dimmer input varies the level of the DC input voltage.
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Abstract
A dual stage power converter capable of being installing in a one-gang box and powering an LED load is presented. The dual stage converter includes a power factor correction (PFC) stage operating in transition mode and a resonant converter stage operating at a fixed frequency with a fixed duty cycle and dead time. A dimmer input is included to select a desired luminosity of the LED load. A main controller adjusts the value of the voltage output from the PFC stage in order to maintain the voltage output from the resonant stage at the desired level.
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Citations
22 Claims
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1. An LED driver comprising:
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a power converter disposed in a one-gang box to receive an AC mains voltage and to output a DC output voltage for driving an LED device, the power converter comprising; a rectifier to receive the AC mains voltage and convert the AC mains voltage into a DC input voltage; a power factor correction (PFC) converter stage to receive the DC input voltage, perform power factor correction, and generate a first stage voltage; and a resonant converter stage to receive the first stage voltage and generate an output voltage; a dimmer input disposed within the one-gang box to vary a level of the DC output voltage; and a main controller, wherein; the PFC converter stage is to generate the first stage voltage at a level, the level of the first stage voltage based on a control voltage, the main controller is to receive the output voltage and to generate the control voltage based on the output voltage, and the resonant converter stage is configured to operate at a fixed frequency with a fixed duty cycle and dead time when the dimmer input varies the level of the DC input voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An LED driver comprising:
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a power converter disposed in a one-gang box to receive an AC mains voltage and to output a DC output voltage for driving an LED device, the power converter comprising; a rectifier to receive the AC mains voltage and convert the AC mains voltage into a DC input voltage; a power factor correction (PFC) converter stage to receive the DC input voltage, perform power factor correction, and generate a first stage voltage; a resonant converter stage to receive the first stage voltage and generate an output voltage; and a main controller, wherein the PFC converter stage generates the first stage voltage at a level, the level of the first stage voltage based on a control voltage, the resonant converter stage is operable at a fixed frequency with a fixed duty cycle and dead time, and the main controller receives the output voltage and generates the control voltage based on the output voltage; a dimmer input disposed within the one-gang box to vary a level of the DC output voltage; and a skip circuit that causes the resonant converter stage to enter a skip mode when the control voltage is below a reference level. - View Dependent Claims (21, 22)
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Specification