公开(公告)号：US11502599B2

公开(公告)日：2022-11-15

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

IPC: H02M3/07 ,  H02M1/08 ,  H02J7/00

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.