Title:
WIRELESS CHARGING CIRCUIT, SWITCHING CIRCUIT, CONTROL METHOD AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/087826
Kind Code:
A1
Abstract:
The present application is applicable to the technical field of wireless charging, and provides a wireless charging circuit 1, a switching circuit 2, a control method thereof and a storage medium. The control method comprises: controlling the on-off state of a switch tube according to a first dead time; and if the drain source voltage and the gate source voltage of the switch tube of any lower bridge arm are at low levels at the same time in the k-th switching period, shortening the first dead time to a second dead time; and obtaining the second dead time of the zero-voltage switch through cyclic debugging. The debugging process does not require the collection of voltage information or current information of a load terminal, and the dead time can be adaptively adjusted when the parameter of the wireless charging circuit 1 is changed or the load is changed. The control efficiency and the degree of automation are improved while the control logic of the zero-voltage switch is simplified, thereby reducing the switching loss.
Inventors:
FANG JIE (CN)
WAN SHIMING (CN)
QU CHUNYING (CN)
YANG JUN (CN)
ZENG DEZHI (CN)
WAN SHIMING (CN)
QU CHUNYING (CN)
YANG JUN (CN)
ZENG DEZHI (CN)
Application Number:
PCT/CN2022/114582
Publication Date:
May 25, 2023
Filing Date:
August 24, 2022
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H02M3/335; H02J50/00
Foreign References:
| CN104467443A | 2015-03-25 | |||
| CN112994472A | 2021-06-18 | |||
| CN109962622A | 2019-07-02 | |||
| JP2011130577A | 2011-06-30 | |||
| JP2006304383A | 2006-11-02 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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