Systems and methods for low-power lamp compatibility with an electronic transformer
First Claim
1. An apparatus for providing compatibility between a load having a reactive impedance during steady-state operation and a secondary winding of an electronic transformer driven by a leading-edge dimmer, comprising:
- a first circuit for causing the load to have a substantially non-reactive impedance as seen at terminals of the secondary winding when the first circuit is enabled; and
a second circuit comprising a timer circuit for enabling the first circuit to cause the load to have the substantially non-reactive impedance as seen at the terminals of the secondary winding during a duration of time following start-up of the electronic transformer and for disabling the first circuit after the duration such that the load has the reactive impedance as seen at the terminals of the secondary winding during steady-state operation of the load, wherein the timer circuit comprises a digital counter.
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Accused Products
Abstract
In accordance with embodiments of the present disclosure, a system and method for providing compatibility between a load having a reactive impedance during steady-state operation and a secondary winding of an electronic transformer driven by a leading-edge dimmer may include a first circuit and a second circuit. The first circuit may cause the load to have a substantially non-reactive impedance when the first circuit is enabled. The second circuit may enable the first circuit to cause the load to have the substantially non-reactive impedance during a duration of time following start-up of the electronic transformer and disable the first circuit after the duration such that the load has the reactive impedance during steady-state operation of the load.
88 Citations
18 Claims
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1. An apparatus for providing compatibility between a load having a reactive impedance during steady-state operation and a secondary winding of an electronic transformer driven by a leading-edge dimmer, comprising:
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a first circuit for causing the load to have a substantially non-reactive impedance as seen at terminals of the secondary winding when the first circuit is enabled; and a second circuit comprising a timer circuit for enabling the first circuit to cause the load to have the substantially non-reactive impedance as seen at the terminals of the secondary winding during a duration of time following start-up of the electronic transformer and for disabling the first circuit after the duration such that the load has the reactive impedance as seen at the terminals of the secondary winding during steady-state operation of the load, wherein the timer circuit comprises a digital counter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for providing compatibility between a load having a reactive impedance during steady-state operation and a secondary winding of an electronic transformer driven by a leading-edge dimmer, comprising:
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causing, by a first circuit, the load to have a substantially non-reactive impedance as seen at terminals of the secondary winding when the first circuit is enabled; and enabling, by a second circuit comprising a timer circuit, the first circuit to cause the load to have the substantially non-reactive impedance as seen at the terminals of the secondary winding during a duration of time following start-up of the electronic transformer; and disabling, by the second circuit, the first circuit after the duration such that the load has the reactive impedance as seen at the terminals of the secondary winding during steady-state operation of the load, wherein the timer circuit comprises a digital counter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification