Energy recycle circuit for flyback circuit and method thereof
US11387740B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2021 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy recycle circuit for a flyback circuit, the flyback circuit has a primary winding of a transformer a primary switch. The energy recycle circuit has an energy recycle branch coupled in parallel with the primary winding, and an integrated circuit having a plurality of pins. The energy recycle branch has an auxiliary switch and a clamp capacitor connected in series. Among the plurality of pins, a first pin receives an external supply voltage. A second pin is used as a power ground that is different from a primary power ground. A third pin is used to sense a branch current flowing through the energy recycle branch. A fourth pin is used to control an operation of the auxiliary switch. A fifth pin that is connected to an external resistor for setting a maximum ON-time threshold of the auxiliary switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.