Non-isolated resonant DC-DC converter with boost-type voltage doubler output
First Claim
1. A driver circuit for providing power from a power source to a load, said driver circuit comprising:
- an inverter having a control input, a power input, and an inverter output, wherein;
the power input is configured to connect a direct current (DC) power rail; and
the inverter is configured to provide an alternating current (AC) output signal as a function of a drive signal received at the control input of the inverter;
a voltage doubler output stage having a voltage doubler input and a voltage doubler output, wherein;
the voltage doubler output is configured to connect to the load;
the voltage doubler input is coupled to the inverter output;
the voltage doubler output stage is configured to convert the AC output signal from the inverter into a DC output signal; and
the voltage doubler output stage comprisesa first diode having an anode and a cathode,a second diode having an anode and a cathode,a charge capacitor having a first terminal coupled to the voltage doubler input and a second terminal coupled to the cathode of the second diode,a boost inductor having a first terminal connected to the cathode of the second diode and to the second terminal of the charge capacitor, and a second terminal connected to the anode of the first diode, andwherein the cathode of the first diode is coupled to the voltage doubler output.
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Accused Products
Abstract
A light fixture includes a housing, a non-isolated driver circuit with a boost type voltage doubler output stage, and a light source. The load or light source may be a plurality of LEDs. The housing supports the light source and the driver circuit, and the housing may include a lens for the one or more LEDs of the light source. The driver circuit provides power from the power source to the light source. The light source provides light in response to receiving power. The boost type voltage doubler output stage is a voltage doubler output stage having a boost inductor connected between an input (e.g., connected to an output of an inverter of the driver circuit) and an output (e.g., connected to the load or light source) of the boost type voltage doubler output stage.
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Citations
18 Claims
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1. A driver circuit for providing power from a power source to a load, said driver circuit comprising:
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an inverter having a control input, a power input, and an inverter output, wherein; the power input is configured to connect a direct current (DC) power rail; and the inverter is configured to provide an alternating current (AC) output signal as a function of a drive signal received at the control input of the inverter; a voltage doubler output stage having a voltage doubler input and a voltage doubler output, wherein; the voltage doubler output is configured to connect to the load; the voltage doubler input is coupled to the inverter output; the voltage doubler output stage is configured to convert the AC output signal from the inverter into a DC output signal; and the voltage doubler output stage comprises a first diode having an anode and a cathode, a second diode having an anode and a cathode, a charge capacitor having a first terminal coupled to the voltage doubler input and a second terminal coupled to the cathode of the second diode, a boost inductor having a first terminal connected to the cathode of the second diode and to the second terminal of the charge capacitor, and a second terminal connected to the anode of the first diode, and wherein the cathode of the first diode is coupled to the voltage doubler output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A light fixture comprising:
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a light source operable to provide light in response to receiving power; a driver circuit configured to provide power from a power source to the light source, said driver circuit comprising; an inverter having a control input, a power input, and an output, wherein; the power input is connected to a direct current (DC) power rail; and the inverter is configured to provide an alternating current (AC) output signal as a function of a drive signal received at the control input of the inverter; a voltage doubler output stage having an input and an output, wherein; the output is configured to connect to the light source; the input of the voltage doubler output stage is connected to the output of the inverter; the voltage doubler output stage is configured to convert the AC output signal from the inverter into a DC output signal; and the voltage doubler output stage comprises a first diode having an anode and a cathode, a second diode having an anode and a cathode, a charge capacitor having a first terminal coupled to the input of the voltage doubler output stage and a second terminal coupled to the cathode of the second diode, a boost inductor having a first terminal connected to the cathode of the second diode and to the second terminal of the charge capacitor, and a second terminal coupled to the anode of the first diode, and wherein the cathode of the first diode is coupled to the output of the voltage doubler output stage; and a housing configured to support the light source and the driver circuit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A DC-DC converter comprising:
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a DC input including a DC power rail and a DC input circuit ground; a converter output including load terminals configured to couple to a load; an inverter circuit having an inverter input coupled to the DC power rail and an inverter output, the inverter circuit including a resonant inductor and a resonant capacitor; a voltage doubler circuit having a voltage doubler input coupled to the inverter output and a voltage doubler output coupled to the load terminals; wherein the voltage doubler circuit comprises a first diode having an anode and a cathode, a second diode having an anode and a cathode, a charge capacitor having a first terminal coupled to the voltage doubler input and a second terminal coupled to the cathode of the second diode, a boost inductor having a first terminal connected to the cathode of the second diode and to the second terminal of the charge capacitor, and a second terminal coupled to the anode of the first diode; wherein the cathode of the first diode is coupled to the voltage doubler output; and wherein one of the load terminals is an output common terminal electrically coupled to the DC input circuit ground. - View Dependent Claims (18)
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Specification