The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 2008
Filed:
Feb. 01, 2006
Arnold Schonleitner, Vienna, AT;
Hallak Jalal Abdulazim, Vienna, AT;
Arnold Schonleitner, Vienna, AT;
Hallak Jalal Abdulazim, Vienna, AT;
Siemens AG Osterreich, Vienna, AT;
Abstract
A switched-mode power supply for converting a DC input voltage (Uzk) into an output voltage (Ua). The switched-mode power supply comprises a circuit (AST) for triggering at least one controlled switch (S) that periodically applies the input voltage to at least one primary winding (Wp) of a transformer (UET). An auxiliary voltage for the triggering circuit can be switched off with the aid of an auxiliary semiconductor switch (Ts) when the input voltage drops below a given minimum value, the auxiliary voltage consisting of a first auxiliary supply voltage (Uh) diverted from the input voltage and a second auxiliary supply voltage (Uhl) diverted from a secondary winding (Wh) of the transformer by means of rectification. The control electrode (G) of the auxiliary switch (Ts) is connected to both a reference voltage output (R) of a reference voltage (Uref) that is internally generated in the triggering circuit (AST) and a divider point (Te) of an input voltage divider (Rs1,R1,R2) such that the control electrode (G) of the auxiliary switch (Ts) receives an additional voltage during operation of the triggering circuit so as to turn on the auxiliary switch (Ts).