Fan control circuit
US11564330B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2020 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Apr 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/20945
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fan control circuit for controlling at least one fan of a power supply device includes a load sensing unit, a temperature sensing unit, a control unit connected to the load sensing unit, the temperature sensing unit and the fan, and a mode switching unit. The load sensing unit generates a load signal according to an output condition of the power supply device. The temperature sensing unit senses the temperature in the power supply device and generates a temperature signal. The control unit comprises a low-speed operating mode for controlling the fan according to the load signal, a mute mode for controlling the fan according to the temperature signal, and a full-speed operating mode for controlling the fan to run in a rated rotational speed. The mode switching unit controls the control unit to adjust the rotational speed of the fan by one of the three modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.