Driving light emitting diode (LED) lamps using power received from ballast stabilizers

An illuminating apparatus for producing light using a light emitting diode (LED) lamp including a plurality of LEDs based on alternating current (AC) power received from a ballast stabilizer configured to drive a lamp, the illuminating apparatus comprising:

• a transformer coupled to the ballast stabilizer, configured to receive the AC power and to output transformed AC power having an amplitude appropriate for driving the LED lamp;
• a rectifying circuit configured to receive the transformed AC power from the transformer, and to rectify the AC power into direct current (DC) power for driving the LED lamp;
• and
• an output circuit configured to receive and filter the rectified DC power from the rectifying circuit, and to drive the LED lamp using the filtered DC power,
• wherein the transformer includes two output windings each coupled between two of at least three output terminals of the transformer.

A circuit for driving a light emitting diode (LED) lamp based on alternating current (AC) power received from a ballast stabilizer configured to drive a lamp, the circuit comprising:

• an inductive load coupled to the ballast stabilizer and configured to receive the AC power at terminals thereof;
• a rectifying circuit coupled to the inductive load and configured to produce rectified direct current (DC) power at a pair of output terminals;
• and
• a filter circuit comprising a series interconnection of an inductor and a capacitor, wherein the series interconnection is coupled between the pair of output terminals of the rectifying circuit, and wherein a voltage across the capacitor drives the LED lamp,
• wherein the inductive load includes two output windings each coupled between input terminals of the rectifying circuit.

An illuminating apparatus comprising:

• a plate including a light emitting diode (LED) lamp comprising a plurality of LEDs, and a circuit for driving the LED lamp based on alternating current (AC) power received from a ballast stabilizer configured to drive a lamp;
• a housing having the plate mounted therein, and configured to protect the plate, LED lamp, and driving circuit;
• and
• a socket disposed in an end portion of the plate and configured to receive the AC power from the ballast stabilizer at a pair of terminals,
• wherein the circuit for driving the LED lamp disposed on the plate comprises:
• an inductive load coupled to the pair of terminals of the socket and configured to receive the AC power from the ballast stabilizer;
• a rectifying circuit, electrically coupled to the inductive load and configured to rectify the AC power to produce a unidirectional current;
• and
• an output circuit configured to receive the unidirectional current from the rectifying circuit, and to produce an output current for driving the LED lamp, and
• wherein the inductive load comprises at least one of:
• two input windings coupled between three input terminals receiving the AC power from the ballast stabilizer;
• and
• two output windings coupled between three output terminals of the rectifying circuit.