AC-DC converter with secondary side-control and synchronous rectifier sense architecture
US10903752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2020 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Jan 10, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An AC-DC converter with secondary side control and synchronous rectifier (SR) architecture and method for operating the same are provided for reducing the cost, complexity and size of the converter while improving efficiency. In an example embodiment, an integrated circuit (IC) controller for the secondary side of the AC-DC converter comprises a zero-crossing detector (ZCD) block and a negative-sensing (NSN) block coupled to a terminal. The terminal is configured to receive an input signal from a drain node of a SR circuit on the secondary side of the AC-DC converter. The ZCD block is configured to determine when a voltage of the input signal reaches 0V. The NSN block is configured to determine a negative voltage of the input signal. An internal rectifier, coupled between the terminal and local ground, is configured to ensure that substantially no current flows through the terminal during operation of the ZCD block and the NSN block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.