Low power switching power supply circuits and methods

Details Low power switching power supply circuits and methods Low power switching power supply circuits and methods

H - Electricity

02

M

H02M 3/156 (2006.01) G05F 1/563 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2050199

ABSTRACT OF THE DISCLOSURE Switching power supplies for low power circuits. Power supplies described and disclosed herein comprise a linear regulator for regulating an input power to this power supply, a flyback regulator with three modes of output control comprising indirect sense feedforward, feedback, and override control. Indirect sense feedforward responds to changes in input voltage. The feedback responds to changes in output voltage with use of both of these wide variations in input voltage and output load can be tolerated. The override control takes over during abnormal conditions such as startup and short circuit. Switching power supplies described herein have high efficiencies and provide efficient power management, especially in low power budget applications.

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