Control circuit with multiple feedback loops and switching power supply thereof
US9525334B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2015 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Sep 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit with multiple feedback loops configured for a switching power supply, can include: (i) a plurality of feedback circuits configured to receive a plurality of feedback signals of a power stage circuit, and to correspondingly generate a plurality of error signals; (ii) a plurality of switching circuits configured to transfer the error signals to a compensation circuit, where each switching circuit is correspondingly coupled to one of the feedback circuits, and where only one of the switching circuits is turned on to correspondingly transfer one of the error signals to the compensation circuit when in a steady status; (iii) the compensation circuit being configured to receive the error signals, and to generate a compensation signal; and (iv) a PWM control circuit configured to receive the compensation signal, and to generate a PWM control signal to control operation of a power switch in the power stage circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.