OMNI voltage direct current power supply
DCFirst Claim
1. A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
- an input for receiving a direct current (DC) voltage;
an output for driving at least one LED;
a current sensor for sensing a current through said at least one LED; and
a switch-mode regulator receiving said DC voltage from said input and providing a substantially constant current output to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor.
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Abstract
A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage.
27 Citations
40 Claims
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1. A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
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an input for receiving a direct current (DC) voltage; an output for driving at least one LED; a current sensor for sensing a current through said at least one LED; and a switch-mode regulator receiving said DC voltage from said input and providing a substantially constant current output to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor. - View Dependent Claims (2, 3, 4, 5, 6, 36)
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7. A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
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an input for receiving a DC voltage; an output for driving at least one LED; a current sensor for sensing a current through said at least one LED; and a switch-mode regulator receiving said DC voltage from said input, receiving an LED current feedback signal from said current sensor, and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the feedback signal from the current sensor. - View Dependent Claims (8, 37)
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9. A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
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an input for receiving a DC voltage; an output for driving at least one LED; a current sensor for sensing a current through said at least one LED; a switch-mode regulator operating in a buck mode, said regulator receiving said DC voltage from said input and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor. - View Dependent Claims (10, 38)
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11. A ballasting DC/DC power supply for powering a light emitting diode based illumination device comprising:
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an input for receiving a DC voltage; an output for driving at least one LED; a current sensor for sensing a current through said at least one LED; and a switch-mode regulator operating in a boost mode, said regulator receiving a first DC voltage from said input and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor. - View Dependent Claims (12, 39)
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13. A battery operated LED lighting apparatus comprising:
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one or more connectors or terminals for receiving a battery voltage output by a battery; at least one light emitting diode; and a power supply including a boost regulating circuit, said power supply in communication with said battery to produce an output voltage to said at least one light emitting diode such that a constant direct current is continuously supplied at a predetermined level to said at least one light emitting diode as said battery discharges regardless of voltage fluctuations across said at least one light emitting diode, wherein over at least a portion of said discharge cycle said output voltage is maintained in a range higher than said battery voltage, and wherein the power supply maintains the constant direct current by sensing electrical current directed through the at least one LED. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A battery operated LED lighting apparatus comprising:
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one or more connectors or terminals for receiving a battery voltage output by a battery; at least one light emitting diode; and a power supply including a buck regulating circuit, said power supply in communication with said battery to produce an output voltage to said at least one light emitting diode such that a constant direct current is continuously supplied at a predetermined level to said at least one light emitting diode as said battery discharges regardless of voltage fluctuations across said at least one light emitting diode, wherein over at least a portion of said discharge cycle said output voltage is maintained in a range equal to or lower than said battery voltage, and wherein the power supply maintains the constant direct current by sensing electrical current directed through the at least one LED. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
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an input for receiving a direct current (DC) voltage from a battery; an output for driving at least one LED; a current sensor for sensing a current through said at least one LED; and a switch-mode regulator receiving said DC voltage from said input and providing a constant current output to said LED over at least a portion of said battery'"'"'s discharge cycle by adjusting the switch-mode regulator as a function of the current sensed by said current sensor. - View Dependent Claims (40)
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Specification