Driver for a light emitting diode (LED) lighting system
View Patent ↗Provided is a lighting system driver including a damper circuit. A power circuit is coupled to the damper circuit and includes a first portion of a winding of a transformer. Also included is an oscillating control circuit including a second portion of the winding of the transformer.
1. A lighting system driver compatible with, and configured to be connected to, a dimmer external to the lighting system driver, the driver comprising:
a damper circuit configured to damp current ringing;
a power circuit coupled to the damper circuit, the power circuit comprising:
a transformer including:
a primary winding configured to receive power from the damper circuit, the primary winding having (i) a main winding and (ii) an auxiliary winding; and
a secondary winding configured to receive power from the primary
winding and transfer the received power to a phase-cut dimmer;
a main power segment including the main winding of the primary winding, the secondary winding, and a switching transistor configured to provide switching for the secondary winding; and
a passive oscillating control circuit coupled to the switching transistor and including the auxiliary winding of the transformer;
wherein:
the passive oscillating control circuit is configured to oscillate the switching transistor on and off; and
the driver is devoid of an integrated circuit (IC) controller.
2. The lighting system driver of claim 1 , wherein the transistor is a metal oxide semiconductor field effect transistor.
3. The lighting system driver of claim 1 , wherein the damper circuit is passive.
4. The lighting system driver of claim 3 , wherein the damper circuit is configured to restrain peak current.
5. The lighting system driver of claim 4 , wherein restraining the peak current facilitates dimming.
6. The lighting system driver of claim 5 , wherein the damper circuit includes a capacitor and a resistor.
7. The lighting system driver of claim 1 , further comprising an open circuit protection block including one or more diodes coupled to the second winding.
8. The lighting system driver of claim 1 , wherein the passive oscillating control circuit further comprises a capacitor, wherein the auxiliary winding and the capacitor are configured to cause oscillation of the driver.
9. A light emitting diode driver, comprising:
a transformer including
a primary winding configured to receive power, the primary winding having (i) a main winding and (ii) an auxiliary winding; and
a secondary winding configured to receive power from the primary winding and transfer the received power to an output light emitting diode (LED);
a main power segment including the main winding of the primary winding, the secondary winding, and a switching transistor coupled to the main winding of the switching transformer transistor and configured to provide switching for the secondary winding; and
and a passive oscillating control circuit (i) coupled to the switching transistor, (ii) including the auxiliary winding of the transformer (iii) and configured to control the transistor;
wherein the driver is devoid of an integrated circuit (IC) controller: and wherein the driver is compatible with and configured to be connected to a dimmer.
10. The light emitting diode driver of claim 9 , further including a passive damper circuit configured to (i) restrain peak current or damp current ringing and (ii) deliver power to the primary winding.
11. The emitting diode driver of claim 9 , wherein the passive oscillating control circuit further comprises a capacitor, wherein the auxiliary winding and the capacitor are configured to cause oscillation of the driver.