Circuit for controlling switching power supply by current limiting and magnetic field detection, and method for controlling switching power supply by using circuit
US11223269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2020 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Jul 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0019
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for controlling a switching power supply and a method for controlling a switching power supply by using the circuit for controlling the switching power supply, the circuit for controlling a switching power supply is configured to control a power stage circuit of a converter of the switching power supply. The circuit for controlling the switching power supply includes an external magnetic field direct detection unit, a current limit threshold unit, an operating frequency unit, a pulse width unit and a logic unit. The external magnetic field direct detection unit includes a Hall device and a Hall detection component. In accordance with the circuit for controlling the switching power supply of the present disclosure, the intensity of the external magnetic field can be detected directly at the chip level, and the operating mode of the switching power supply system can be adjusted timely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.