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:
Jan. 30, 2018
Filed:
May. 23, 2017
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Lei Li, Chengdu, CN;
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Abstract
A control method used in a four-switch buck-boost converter includes: filtering the voltage at the first switching node and generating a first ramp signal; filtering the first ramp signal and generating a first average signal; filtering the voltage at the second switching node and generating a second ramp signal; filtering the second ramp signal and generating a second average signal; generating a set signal based on the first ramp signal, the first average signal, the second ramp signal, the second average signal, a reference signal, and a feedback signal indicative of the output voltage, so as to turn on the first and third transistors, and turn off the second and fourth transistors; turning off the first transistor and turning on the second transistor when the on-time of the first transistor reaches a first time threshold; and turning off the third transistor and turning on the fourth transistor when the on-time of the third transistor reaches a second time threshold.