Title:
POWER SUPPLY CIRCUIT AND CHARGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/179937
Kind Code:
A1
Abstract:
Provided by the present disclosure are a power supply circuit and a charging device. The power supply circuit comprises a pulse transformer circuit and a first power conversion circuit. The pulse transformer circuit comprises a pulse transformer and a switch control circuit; a primary winding of the pulse transformer is connected to a power supply and is connected to the switch control circuit, and the switch control circuit is used to modulate the voltage on the primary winding into a pulse voltage; and the input terminal of the first power conversion circuit is connected to a secondary winding of the pulse transformer, and is used to transform the voltage on the secondary winding of the pulse transformer into a first preset voltage range when the voltage outputted by the secondary winding exceeds the first preset voltage range, and then output the voltage. The disclosed power supply circuit may improve the adaptability of a charging device with different power supply sources so as to ensure the adjustable range of the output voltage.
Inventors:
JIANG SENLONG (CN)
CHIU CHIH-WEI (CN)
ZHANG JIALIANG (CN)
TIAN CHEN (CN)
ZHANG JUN (CN)
CHIU CHIH-WEI (CN)
ZHANG JIALIANG (CN)
TIAN CHEN (CN)
ZHANG JUN (CN)
Application Number:
PCT/CN2021/078536
Publication Date:
September 16, 2021
Filing Date:
March 01, 2021
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H02J7/04
Foreign References:
| CN204696929U | 2015-10-07 | |||
| CN101572484A | 2009-11-04 | |||
| US20110216560A1 | 2011-09-08 | |||
| CN101834539A | 2010-09-15 | |||
| CN201766507U | 2011-03-16 |
Attorney, Agent or Firm:
SHENZHEN LUNGTIN LIANDING INTELLECTUAL PROPERTY AGENT LTD. (CN)
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