Constant current series-switching regulator

Details Constant current series-switching regulator Constant current series-switching regulator

H - Electricity

02

M

323/11

H02M 3/135 (2006.01) H02M 3/335 (2006.01)

Patent

CA 1069177

A CONSTANT CURRENT SERIES-SWITCHING REGULATOR by Brian McConnell ABSTRACT When connected to a source of unregulated DC power, a series switching regulator delivers a constant output current to a load. A series switch, in response to a control signal, adjusts the flow of input power by switching ON and OFF. The switching operation generates a gated power signal having a variable duty cycle, and the duty cycle depends on the power demands of the load. During the period when the switch is ON, the energy in the gated power signal is stored in the magnetic field of a transformer. During the period when the switch is OFF, the transformer releases the stored energy to capacitive storage devices and to the output load. The capacitive storage devices also supply current to the load when the transformer is storing energy. Feedback signals from voltage and current sensors combine to form a single control signal which adjusts the duty cycle of the switch until the power demands of the load are met.

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