High input voltage DC to DC power converter
Over stress sense circuit for flyback power supply
Flyback voltage control
ApplicationNo. 272006 filed on 11/15/1988
US Classes:363/21.11, Having particular pulse-width modulation circuit363/61For rectifying
ExaminersPrimary: Salce, Patrick R.
Assistant: Sterrett, Jeffrey
Attorney, Agent or Firm
International ClassH02M 003/335
AbstractIn a switching power supply including a step-up transformer having primary and secondary windings, wherein in each successive cycle of operation, during a first period of time a voltage pulse is applied across the primary winding for causing forward current in the secondary to flow through a shuttle capacitor and output capacitor connected in series with the secondary winding at this time, for charging the output capacitor to a voltage level approaching the voltage across the series circuit of the shuttle capacitor and secondary winding, and in an immediately following second period of time terminating the voltage pulse across the primary winding, and allowing flyback energy in the secondary winding to charge and be captured only by the shuttle capacitor for transfer to the output capacitor during the next cycle of operation.