Electric power conversion systems – Current conversion – Including automatic or integral protection means
Reexamination Certificate
2005-07-08
2009-11-03
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Including automatic or integral protection means
C323S284000, C323S908000
Reexamination Certificate
active
07613019
ABSTRACT:
Techniques are disclosed to limit the current in a switch of a switching power supply. An example switching regulator circuit includes a switch to be coupled to an energy transfer element. A controller is coupled to the switch to control switching of the switch. A current sensor is included in the controller. The current sensor includes first and second comparators coupled to compare a current in the switch with first and second current limits, respectively. The controller is to open the switch for a remainder of a current switching cycle of the switch until a next switching cycle of the switch in response to the first or second comparators. A frequency adjuster is also included in the controller and coupled to the second comparator. The frequency adjuster is to adjust an oscillating frequency of an oscillator included in the controller in response to the second comparator.
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Blakely , Sokoloff, Taylor & Zafman LLP
Han Jessica
Pham Emily
Power Integrations, Inc.
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