Energy saving startup circuit for power supply

Details Energy saving startup circuit for power supply Energy saving startup circuit for power supply

2008-06-10

2008-06-10

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S2090CD, C315S299000

Reexamination Certificate

active

07385356

ABSTRACT:
A startup circuit (30) for a power supply (44), has an input (31) for connecting to a source of high voltage thereto, and an output rail (33) for feeding rectified voltage to the power supply. A first energy storage device (35) is coupled to the output rail for storing energy when voltage is first applied to the input, and a second energy storage device (37) is coupled to an output of the power supply for storing energy when a voltage appearing at the output of the power supply reaches substantially steady state. A switching circuit (36, 50) is coupled to the first energy storage device and the second energy storage device and is responsive to the first energy storage device having sufficient energy for transferring the energy to the second energy storage device and disconnecting the first energy storage device from the output rail.

REFERENCES:
patent: 4460951 (1984-07-01), Fenter et al.
patent: 5449979 (1995-09-01), Ueoka et al.
patent: 5477175 (1995-12-01), Tisinger et al.
patent: 5880942 (1999-03-01), Leu
patent: 6246596 (2001-06-01), Yamazaki
patent: 42 27 183 (1994-02-01), None
patent: H10-257759 (1998-09-01), None
patent: 2001-275347 (2001-10-01), None
Chinese Official Action dated Aug. 31, 2007.

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