Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-09-28
2010-11-02
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S222000
Reexamination Certificate
active
07825646
ABSTRACT:
The present invention provides a current-mode control step-up converter capable of reducing the minimum duty ratio to a sufficiently small value and facilitating the setting of the maximum duty ratio. The step-up converter comprises a current detector9for generating a current detection signal Vc corresponding to the current of a rectifier4; an error amplifier8for generating an error signal Ve corresponding to an output DC voltage Vo; and a control circuit10for turning ON/OFF the main switch3on the basis of the current detection signal Vc and the error signal Ve. The control circuit10comprises a comparator11and a timer circuit12. With this configuration, the ON time of the main switch3is set at a predetermined value, and the valley value of an inductor current changing in a triangular waveform is controlled. Hence, the OFF time of the main switch is adjusted to stabilize the output. Since the ON time of the main switch3can be set as desired, the minimum duty ratio can be reduced to zero or a sufficiently small value.
REFERENCES:
patent: 5612610 (1997-03-01), Borghi et al.
patent: 6600670 (2003-07-01), Morita et al.
patent: 7088081 (2006-08-01), Takahashi et al.
patent: 7141940 (2006-11-01), Ortiz
patent: 2004/0070378 (2004-04-01), Baldwin et al.
patent: 2005/0218877 (2005-10-01), Oswald et al.
patent: 2008/0079409 (2008-04-01), Motomori et al.
patent: 2000-134923 (2000-05-01), None
Ishii Takuya
Ishimaru Makoto
Kimura Kazuhito
Koto Masaaki
Morita Junichi
Han Jessica
McDermott Will & Emery LLP
Panasonic Corporation
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