UNIVERSAL BALLAST
First Claim
Patent Images
1. A universal ballast, the ballast comprising:
- a power converter configured to receive an input signal and convert the input signal to a direct current (DC) voltage having a first magnitude;
a transformer having a center-tapped primary winding coupled to the power converter and a secondary winding coupled to a lamp;
a current sensor configured to sense a current in the secondary winding; and
a controller configured to receive an indication of the detected current from the current sensor and to determine correct operating parameters for the lamp.
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Abstract
A universal ballast. The ballast includes a power converter, a transformer, a current sensor, and a controller. The power converter is configured to receive an input signal and convert the input signal to a direct current (DC) voltage having a first magnitude. The transformer has a center-tapped primary winding coupled to the power converter and a secondary winding coupled to a lamp. The current sensor is configured to sense a current in the secondary winding. And the controller is configured to receive an indication of the detected current from the current sensor and to determine correct operating parameters for the lamp.
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Citations
20 Claims
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1. A universal ballast, the ballast comprising:
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a power converter configured to receive an input signal and convert the input signal to a direct current (DC) voltage having a first magnitude; a transformer having a center-tapped primary winding coupled to the power converter and a secondary winding coupled to a lamp; a current sensor configured to sense a current in the secondary winding; and a controller configured to receive an indication of the detected current from the current sensor and to determine correct operating parameters for the lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A gas-discharge light fixture, the fixture comprising:
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a gas-discharge lamp; and a ballast including a power converter configured to receive an input signal and convert the input signal to a direct current (DC) voltage having a first magnitude, a transformer having a center-tapped primary winding coupled to the power converter and a secondary winding coupled to a lamp, a current sensor configured to sense a current in the secondary winding, and a controller configured to receive an indication of the detected current from the current sensor and to determine optimum operating conditions for the lamp. - View Dependent Claims (17, 18, 19, 20)
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Specification