Title:
LOW-VOLTAGE STARTING CIRCUIT FOR LOW-INDUCTANCE WIRELESS CHARGING SYSTEM, AND WIRELESS CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/217643
Kind Code:
A1
Abstract:
The present invention provides a low-voltage starting circuit for a low-inductance wireless charging system, and a wireless charging system. The low-voltage starting circuit comprises a voltage input end Vrect, a common grounding end VSS, a PMOS driving signal control module pgate_ctrl_logic, a MOS transistor MN1, a MOS transistor MP1, a Vmax power supply selection and control module vmax_sel, a power-on reset module por, a low-voltage bandgap reference circuit lv_bgr, a rectifier boost logic control module boost_logic, a rectifier SR and a rectifier output undervoltage protection control module vrect_uvlo. The low-voltage starting circuit of the present invention is used for a low-inductance wireless charging system, and can normally start an MCU at a receiving end of the wireless charging system under a low-voltage condition (1.4 V).
Inventors:
WEI WEI (CN)
HOU SENLIN (CN)
WANG JIANPING (CN)
GUO ZHITONG (CN)
HOU SENLIN (CN)
WANG JIANPING (CN)
GUO ZHITONG (CN)
Application Number:
PCT/CN2021/089652
Publication Date:
October 20, 2022
Filing Date:
April 25, 2021
Export Citation:
Assignee:
CHENGDU CONVENIENTPOWER SEMICONDUCTOR CO LTD (CN)
International Classes:
H02J7/10; H02J50/10; H02J50/70
Foreign References:
| CN104079157A | 2014-10-01 | |||
| CN107370355A | 2017-11-21 | |||
| CN201550072U | 2010-08-11 | |||
| CN107508458A | 2017-12-22 | |||
| JP2000133481A | 2000-05-12 |
Other References:
DING DEBIN, YANG YIZHONG, ZHANG ZHANG, XIE GUANGJUN: "The Low-Voltage Start up and High Efficiency Boost DC/DC Converter Design Based on Charge Pump", CHINESE JOURNAL OF ELECTRON DEVICES, DONGNAN DAXUE, NANJING, CN, vol. 36, no. 2, 1 April 2013 (2013-04-01), CN , pages 211 - 216, XP055977436, ISSN: 1005-9490, DOI: 10.3969/j.issn.1005-9490.2013.02.017
Attorney, Agent or Firm:
CHENGDU JIUDING TIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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