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. 01, 2019
Filed:
Sep. 28, 2017
Applicant:
Fairchild Korea Semiconductor Ltd., Bucheon, KR;
Inventors:
Assignee:
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 1/00 (2006.01); H03K 3/00 (2006.01); H03K 17/16 (2006.01); H02M 3/335 (2006.01); H03K 5/1532 (2006.01); H03K 17/60 (2006.01); H03K 17/082 (2006.01); H03K 17/687 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H03K 17/16 (2013.01); H02M 3/33507 (2013.01); H02M 3/33523 (2013.01); H03K 5/1532 (2013.01); H03K 17/0822 (2013.01); H03K 17/60 (2013.01); H03K 17/6877 (2013.01); H02M 2001/0009 (2013.01); H03K 2217/0027 (2013.01);
Abstract
A power supply device includes a power switch that is switched according to a gate voltage. A sense resistor receives a switch current that flows through the power switch to develop a sense voltage. A peak of a primary-side current is detected from the sense voltage. The gate driver has a pair of switches for generating the gate voltage in accordance with a control signal. When a low-side switch of the gate driver is turned on according to the control signal, the gate voltage of the power switch decreases as a sink current flows from the gate of the power switch via the transistor.