US 12,424,934 B2
Systems and methods for performing self-detection and pre-start processes for charge pumps
Jianfeng Huang, Shanghai (CN); Chao Yao, Shanghai (CN); and Qiang Luo, Shanghai (CN)
Assigned to On-Bright Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD., Shanghai (CN)
Filed on May 25, 2023, as Appl. No. 18/202,227.
Claims priority of application No. 202210318614.9 (CN), filed on Mar. 29, 2022.
Prior Publication US 2023/0318449 A1, Oct. 5, 2023
Int. Cl. H02M 3/07 (2006.01); H02M 1/08 (2006.01)
CPC H02M 3/07 (2013.01) [H02M 1/08 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A charge pump for converting an input voltage to an output voltage, the charge pump comprising:
a first capacitor connected between a first terminal and a second terminal;
a second capacitor connected between the second terminal and a third terminal;
a first transistor including a first drain, a first source, and a first gate, the first drain being connected to an input terminal configured to receive the input voltage;
a second transistor including a second drain, a second source, and a second gate, the second drain being connected to the first source and the second terminal;
a third transistor including a third drain, a third source, and a third gate, the third drain being connected to the second source and an output terminal configured to output the output voltage;
a fourth transistor including a fourth drain, a fourth source, and a fourth gate, the fourth drain being connected to the third source and the third terminal, the fourth source being connected to a ground terminal; and
an internal circuit configured to perform a self-detection process by determining whether or not at least one defect has been detected for at least one component selected from a group consisting of the first capacitor, the second capacitor, the first transistor, the second transistor, the third transistor, and the fourth transistor;
wherein the at least one defect includes an open circuit related to the component or a short circuit related to the component;
wherein the internal circuit is further configured to, if no defect is detected for all components of the first capacitor, the second capacitor, the first transistor, the second transistor, the third transistor, and the fourth transistor, perform a pre-start process by at least adjusting a terminal voltage at the second terminal.