Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TRANSFORMER CIRCUIT, VOLTAGE CONVERSION CIRCUIT, ELECTRONIC DEVICE, AND CIRCUIT STARTING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/246061
Kind Code:
A1
Abstract:
The present application relates to a transformer circuit, a voltage conversion circuit, an electronic device, and a circuit starting method. A switching unit is provided between a half-bridge circuit and a resonant circuit, and a control unit controls the switching unit to switch from a first switching state to a second switching state, so as to start the transformer circuit. When the switching unit is in the first switching state, the switching unit and a first switching tube in the half-bridge circuit are complementarily turned on; and when the switching unit is in the second switching state, the switching unit is normally open. Hence, in the starting process of the transformer circuit, the control unit controls the switching unit to gradually switch from the first switching state to the second switching state, so that the duration that the first switching tube and the switching unit are in a turned-on state at the same time within a switching cycle is gradually increased from zero, and thus the magnitude of a current flowing to the resonant circuit in the starting process of the transformer circuit can be controlled, thereby effectively suppressing the current surge in the resonant circuit, and ensuring the safe starting of the transformer circuit.

Inventors:
GUO HONGGUANG (CN)
ZHANG JIN (CN)
ZHANG CHENSONG (CN)
LI JIANGUO (CN)
JI CE (CN)
TIAN CHEN (CN)
ZHANG JIALIANG (CN)
Application Number:
PCT/CN2022/142711
Publication Date:
December 28, 2023
Filing Date:
December 28, 2022
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H02M7/48
Foreign References:
CN114337344A2022-04-12
CN112366934A2021-02-12
CN207339682U2018-05-08
CN107528477A2017-12-29
CN211127586U2020-07-28
US5898583A1999-04-27
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: USER AUTHENTICATION AND AUTHORIZATION METHOD AND APPARATUS, AND MEDIUM AND DEVICE

Next Patent: INTELLIGENT VIDEO-BASED ELECTRIC POWER ANALYSIS AND MONITORING STRUCTURE, SYSTEM AND METHOD, AND STO...