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:
Mar. 19, 2019
Filed:
Jan. 17, 2018
Appleton Grp Llc, Rosemont, IL (US);
Roderick Perez De Castro, Batangas, PH;
Leon Dela Cruz Placido, Jr., Rizal, PH;
Mark Chester Bernardino Nepomuceno, Rizal, PH;
Appleton Grp LLC, Rosemont, IL (US);
Abstract
A control circuit that is applicable to power supply systems that use synchronous rectification techniques is described. The control circuit provides a self-driven method of control to an active switch by sensing the current flow over the switch. The control circuit includes a diode, a MOSFET, and a BJT. The control circuit may include a first resistor and a second resistor that are both connected to a voltage source. An anode side of the diode is connected to the first resistor while a cathode side of the diode is connected to a drain of the MOSFET. The second resistor is connected to a collector of the BJT as well as a gate of the MOSFET. A base of the BJT is connected to the first resistor and the anode side of the diode. An emitter of the BJT is coupled to a source of the MOSFET.