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. 14, 2009
Filed:
May. 11, 2007
Jader Alves DE Lima Filho, Campinas, BR;
Richard Titov Lara Saez, Campinas, BR;
Wallace Alane Pimenta, Jaguariuna, BR;
Jader Alves De Lima Filho, Campinas, BR;
Richard Titov Lara Saez, Campinas, BR;
Wallace Alane Pimenta, Jaguariuna, BR;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A clamping circuit of a DC/DC regulator includes a reference current generator to generate a reference current. The reference current can be based upon a specified maximum voltage across a bootstrap capacitor of the DC/DC regulator. The clamping circuit also includes a current generator that generates a current based on the voltage across the bootstrap capacitor. The current generated by the current generator is compared to the generated reference current. Based on the comparison, the voltage across the bootstrap capacitor is regulated. By regulating the voltage across the bootstrap capacitor based on current, rather than based directly on the voltage across the capacitor, the design of the clamping circuit is simplified compared to voltage-based implementations.