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:
Dec. 07, 1999
Filed:
Mar. 31, 1999
Applicant:
Inventor:
Kwang H Liu, Sunnyvale, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 21 ;
Abstract
An embodiment of a dual-channel switching power system comprises a standby power supply and a main power supply both regulated by an eight-pin control chip. The control chip generates two sets of pulse-width modulation signal from a common clock oscillator and regulates the two power supplies during alternate clock cycles. The switching frequency and over-current limits of the two power supplies are adjustable by selecting different resistance values for two external resistors. The control chip provides an independent over-current protection to each power supply by monitoring the input power flow of the two power supplies via a common current-sense resistor.