Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-02-09
2009-06-02
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S283000, C323S901000
Reexamination Certificate
active
07541795
ABSTRACT:
A regulator is provided. In one embodiment, the regulator operates as follows. During steady-state conditions, the switching frequency is maintained substantially constant. During start-up and/or in response to an over-current event, the reference voltage is attenuated. For example, in one embodiment, during a soft-start, the reference voltage ramps upward. During the soft-start, the switching frequency is attenuated in proportion to the attenuation of the reference voltage. The switching frequency is attenuated by skipping a number of pulses that is proportional to the reference voltage attenuation, or through another method. In another embodiment, a dynamic over-current protection scheme is employed.
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patent: 6836393 (2004-12-01), Kaneko et al.
LM2645, “Advanced Two-Phase Switching Controller with Two Linear Outputs,” National Semiconductor Corporation, pp. 1-20 (2005), no month.
LM2642, “Two-Phase Synchronous Step-down Switching Controller,” National Semiconductor Corporation, pp. 1-21 (2006), no month.
Carlson Jeremy A.
Dunlap, III Glenn Chance
Furlan Igor
Smith Gregory J.
Darby & Darby P.C.
Gaffney Matthew M.
Han Jessica
National Semiconductor Corporation
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