Switching power supply with quick transient response
US8723496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jan 4, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply with a quick transient response is provided. A hysteretic control loop which comprises a hysteretic controller (117) and a control signal gate (116) is added to the original PWM control loop of the switching power supply. The hysteretic controller (117) 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 (117) are in a low potential, and the control signal gate (116) selects output signals (Qp1, Qn1) from a PWM controller (101) as input signals of a gate signal drive circuit (106). 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 (117) outputs a high potential, and the control signal gate (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.