Triac dimmable electronic ballast with single stage feedback pow

Details Triac dimmable electronic ballast with single stage feedback pow Triac dimmable electronic ballast with single stage feedback pow

1998-12-29

2000-11-07

Wong, Don

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315307, 315DIG4, 315DIG7, H05B 3702

Patent

active

061441694

ABSTRACT:
A triac dimmable electronic ballast having a single stage feedback power factor inverter is configured to isolate the resonant circuit current from a DC bias, or a DC transient caused by activations of the triac. The resonant circuit is driven by a high frequency inverter, and contains a feedback path to a DC storage element. Two DC blocking devices are provided, one between the resonant circuit and the inverter, and one between the resonant circuit and the DC storage element.

REFERENCES:
patent: 5404082 (1995-04-01), Hernandez et al.
patent: 5410221 (1995-04-01), Mattas et al.
patent: 5742134 (1998-04-01), Wacyk et al.
patent: 5757143 (1998-05-01), Hernandez Martucci et al.
patent: 5982159 (1999-11-01), Janczak et al.
patent: 5994848 (1999-11-01), Janczak

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