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Title:
FARAD CAPACITOR CHARGING CIRCUIT AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/165596
Kind Code:
A1
Abstract:
A Farad capacitor charging circuit and an electronic device. The Farad capacitor charging circuit comprises a direct-current/direct-current controller (10), a sampling unit (20), a discharging unit (40) and a comparison unit (30). An output pin of the direct-current/direct-current controller (10) is connected to one end of a Farad capacitor (C), and an output regulation pin (SS) thereof is grounded by means of a starting capacitor (Css); the sampling unit (20) is connected in series between the other end of the Farad capacitor (C) and the ground; the discharging unit (40) is connected in parallel to the starting capacitor (Css); and the comparison unit (30) is used for detecting a voltage component of the sampling unit (20), and comparing the voltage component to a preset voltage, such that the discharging unit (40) is controlled, according to a comparison result, to discharge so as to regulate the magnitude of the current of the charging signal. An output current of a charging controller is regulated by means of a structurally simple and low-cost detection, comparison and discharging feedback link. Moreover, a limit value of the output current can be set by regulating a resistance value of the sampling unit (20) or regulating a reference voltage of the comparison unit (30).

Inventors:
ZHANG, Gengxu (Room 501, No. 3 BuildingSoftware Park,,Keji Zhong Second Road, High-Tech Zone, Nanshan District, Shenzhen Guangdong 0, 518000, CN)
LI, Wenxiang (Room 501, No. 3 BuildingSoftware Park,,Keji Zhong Second Road, High-Tech Zone, Nanshan District, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2018/077540
Publication Date:
September 06, 2019
Filing Date:
February 28, 2018
Export Citation:
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Assignee:
SHENZHEN CHENRUI SOFTWARE CO., LTD. (Room 501, No. 3 BuildingSoftware Park,,Keji Zhong Second Road, High-Tech Zone, Nanshan District, Shenzhen Guangdong 0, 518000, CN)
International Classes:
H02J15/00; H02J7/02
Foreign References:
CN102447293A2012-05-09
CN201813199U2011-04-27
CN104348200A2015-02-11
CN206302195U2017-07-04
CN106787006A2017-05-31
JP2006033304A2006-02-02
Attorney, Agent or Firm:
SHENZHEN ZHONGYI PATENT AND TRADEMARK OFFICE (4th Fl. Old Shenzhen Special Zone Newspaper Building, No. 1014 Shennan Middle Road Futian District, Shenzhen Guangdong 8, 518028, CN)
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