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:
Oct. 02, 2007
Filed:
Feb. 07, 2005
Gerhard Thiele, Munich, DE;
Kevin Scoones, Munich, DE;
Thomas Keller, Freising, DE;
Franz Prexl, Niederding, DE;
Gerhard Thiele, Munich, DE;
Kevin Scoones, Munich, DE;
Thomas Keller, Freising, DE;
Franz Prexl, Niederding, DE;
Texas Instruments Deutschland GmbH, Freising, DE;
Abstract
An integrated circuit including a precharge circuit for a DC/DC boost converter which includes a reference current circuit with a MOSFET transistor (MP) that has a gate connected with the gate of the DC/DC boost converter's power MOSFET transistor (MP) to form a current mirror. The precharge circuit works to approach the output voltage to the supply voltage prior to the converter startup. An included regulation circuit adjusts the gate potential at the power MOSFET transistor (MP) and at the MOSFET transistor (MP) in the reference circuit in response to a reduction of the drain-source voltage of the power MOSFET transistor (MP) due to precharging load capacitance, in a sense to keep the precharge current through the power MOSFET transistor (MP) constant.