-
公开(公告)号：US20190386481A1
公开(公告)日：2019-12-19
申请号：US16289836
申请日：2019-03-01
Applicant: QUALCOMM Incorporated
Inventor： Kunhee CHO , Hector Ivan OPORTA , Zhaohui ZHU , Chunping SONG
IPC: H02H7/12 , H02M1/32 , H02H1/00 , G01R19/165
Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for providing input current limiting and input over current protection for a power converter, such as a charge pump converter. One example method of power conversion generally includes sensing an average value associated with an input current for a power supply circuit, sensing an instantaneous value associated with the input current for the power supply circuit, limiting the input current when the sensed average value is greater than a first threshold, and activating over current protection for the power supply circuit when the sensed instantaneous value is greater than a second threshold.
-
2.发明申请公开(公告)号：US20210083573A1
公开(公告)日：2021-03-18
申请号：US17021614
申请日：2020-09-15
Applicant: QUALCOMM Incorporated
Inventor： Ta-Tung YEN , Chunping SONG , Guoyong GUO , Hector Ivan OPORTA , Ahmed ABDELMOATY
Abstract: Techniques and apparatus for supplying power to gate drivers of a switched-mode power supply (SMPS) circuit. One example power supply circuit generally includes a SMPS circuit having a first input voltage node and a second input voltage node, and a charge pump. The charge pump generally includes a first capacitive element having a first terminal and a second terminal; a first switch coupled between a first input node of the charge pump and the first terminal of the first capacitive element; a second switch coupled between the second terminal of the first capacitive element and a second input node of the charge pump; a third switch coupled between the first terminal of the first capacitive element and the first input voltage node of the SMPS circuit; and a fourth switch coupled between the second terminal of the first capacitive element and the second input voltage node of the SMPS circuit.
-
公开(公告)号：US20190115829A1
公开(公告)日：2019-04-18
申请号：US16001073
申请日：2018-06-06
Applicant: QUALCOMM Incorporated
Inventor： Hector Ivan OPORTA , Zhaohui ZHU , Chunping SONG , William RADER
Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for powering up a charge pump converter and providing protection and soft-start circuitry therefor. One example charge pump converter generally includes a first transistor and a second transistor coupled in series between an input voltage node and an output voltage node of the charge pump converter, a first capacitive element having a first terminal coupled to a node between the first and second transistors, and a first switch coupled to the input voltage node, the first switch being configured to selectively enable a first drive circuit having an output coupled to a control terminal of the second transistor.
-
公开(公告)号：US20210083572A1
公开(公告)日：2021-03-18
申请号：US17021591
申请日：2020-09-15
Applicant: QUALCOMM Incorporated
Inventor： Ta-Tung YEN , Guoyong GUO , Chunping SONG , Hector Ivan OPORTA
Abstract: Techniques and apparatus for controlling gate drivers of a switched-mode power supply (SMPS) circuit—such as a three-level buck converter, a divide-by-two charge pump, or an adaptive combination power supply circuit capable of switching therebetween—in a power-saving mode (e.g., a pulse-skipping mode). During such a power-saving mode in which a capacitor of a charge pump is disconnected from at least one power supply rail (e.g., first and second input nodes of the charge pump) and is coupled to power terminals of one or more drivers of the SMPS circuit, the capacitor is temporarily disconnected from the power terminals and temporarily coupled to the at least one power supply rail (e.g., for a few microseconds).
-
-
-
Search Results
4
records
(took 0.01 seconds)
