Power converter and method of control thereof
USRE50277E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2020 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Jul 17, 2040 |
Classification
- Technology area (CPC —)General
Abstract
A flyback power converter includes a hybrid clamp circuit and a corresponding power management unit that substantially optimizes the performance of the flyback power converter in its entire line and load ranges. The clamp circuit, which is connected in parallel to a primary winding of the flyback transformer, includes a parallel combination of a capacitor and resistor that is connected in series with a parallel combination of a switch and a diode. By sensing the operating conditions, the power management circuit configures the clamp circuit either as a passive clamp or as an active clamp. In the passive-clamp configuration, the switch is kept turned off. In the active-clamp configuration, the switch operates with pulse-width modulation (PWM) which enables ZVS turn-on of the main switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.