Switching mode power supply and switch thereof

Details Switching mode power supply and switch thereof Switching mode power supply and switch thereof

2011-06-14

2011-06-14

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C363S021180

Reexamination Certificate

active

07960952

ABSTRACT:
A switching mode power supply and a switch thereof are provided. The switch includes a plurality of first transistors, and a second transistor that is turned on/off by a control signal that is equal to that of the plurality of first transistors and in which a second current corresponding to a first current flowing to the plurality of first transistors flows, wherein a ratio of the first current to the second current sequentially changes from a time point at which the second transistor is turned on. Therefore, a switching mode power supply and a switch thereof that can always uniformly sustain a maximum limit current flowing to the switch regardless of a level of an input voltage without including a special additional circuit can be provided.

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patent: 7110270 (2006-09-01), Balakrishnan et al.
patent: 7576406 (2009-08-01), Tamaki et al.

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