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:
May. 13, 2014
Filed:
Oct. 25, 2010
Weifeng Sun, Nanjing, CN;
Miao Yang, Nanjing, CN;
Youshan Jin, Nanjing, CN;
Sichao Liu, Nanjing, CN;
Shen Xu, Nanjing, CN;
Shengli LU, Nanjing, CN;
Longxing Shi, Nanjing, CN;
Weifeng Sun, Nanjing, CN;
Miao Yang, Nanjing, CN;
Youshan Jin, Nanjing, CN;
Sichao Liu, Nanjing, CN;
Shen Xu, Nanjing, CN;
Shengli Lu, Nanjing, CN;
Longxing Shi, Nanjing, CN;
Southeast University, Jiangsu, CN;
Abstract
A switching power supply with a quick transient response is provided. A hysteretic control loop which comprises a hysteretic controller () and a control signal gate () is added to the original PWM control loop of the switching power supply. The hysteretic controller () is used to detect an output voltage (Vout) of the switching power supply and compare the output voltage (Vout) of the switching power supply with a reference voltage (Vref). When a load current (Iout) of the switching power supply is suddenly changed, the output voltage (Vout) of the switching power supply fluctuates. If the output voltage (Vout) of the switching power supply is in a setting range of the hysteretic voltage, output terminals (SELp, SELn) of the hysteretic controller () are in a low potential, and the control signal gate () selects output signals (Qp, Qn) from a PWM controller () as input signals of a gate signal drive circuit (). If the fluctuation of the output voltage (Vout) of the switching power supply exceeds the setting range of the hysteretic voltage, an output terminal (SELp, SELn) of the hysteretic controller () outputs a high potential, and the control signal gate () selects output signals (Qp, Qn) of the hysteretic controller () as input signals of the gate signal drive circuit (), so the operation of switching tubes () at the power lever () of the switching power supply is controlled to stabilize the output voltage (Vout).