公开(公告)号：US20220360159A1

公开(公告)日：2022-11-10

申请号：US17315444

申请日：2021-05-10

Applicant: Qualcomm Incorporated

Inventor： Troy Lynn Stockstad ,  Yi-Cheng Wan ,  Marko Koski ,  Ajay Kumar Kosaraju

IPC: H02M1/00 ,  H02M1/08 ,  H02M3/158

Abstract: An apparatus is disclosed for harvesting ringing energy. In an example aspect, the apparatus includes a bootstrap circuit. The bootstrap circuit includes a bootstrap capacitor and a bootstrap switch. The bootstrap switch includes a first terminal configured to accept an input voltage. The bootstrap switch also includes a second terminal coupled to the bootstrap capacitor. The bootstrap switch additionally includes a body diode comprising an anode coupled to the first terminal and a cathode coupled to the second terminal. The bootstrap switch is configured to be in an open state to charge the bootstrap capacitor via the body diode. The bootstrap switch is also configured to provide a voltage at the second terminal of the bootstrap switch. The voltage is greater than an average of the input voltage.

公开(公告)号：US11711007B2

公开(公告)日：2023-07-25

申请号：US17315444

申请日：2021-05-10

Applicant: Qualcomm Incorporated

Inventor： Troy Lynn Stockstad ,  Yi-Cheng Wan ,  Marko Koski ,  Ajay Kumar Kosaraju

IPC: H02M1/08 ,  H02M1/00 ,  H02M3/156 ,  H02M3/158

CPC classification number: H02M1/0006 ,  H02M1/08 ,  H02M3/156 ,  H02M3/1582

Abstract: An apparatus is disclosed for harvesting ringing energy. In an example aspect, the apparatus includes a bootstrap circuit. The bootstrap circuit includes a bootstrap capacitor and a bootstrap switch. The bootstrap switch includes a first terminal configured to accept an input voltage. The bootstrap switch also includes a second terminal coupled to the bootstrap capacitor. The bootstrap switch additionally includes a body diode comprising an anode coupled to the first terminal and a cathode coupled to the second terminal. The bootstrap switch is configured to be in an open state to charge the bootstrap capacitor via the body diode. The bootstrap switch is also configured to provide a voltage at the second terminal of the bootstrap switch. The voltage is greater than an average of the input voltage.

公开(公告)号：US10148174B2

公开(公告)日：2018-12-04

申请号：US15348923

申请日：2016-11-10

Applicant: QUALCOMM Incorporated

Inventor： Ajay Kumar Kosaraju ,  Guolei Yu ,  Yi-Cheng Wan ,  Sugato Mukherjee

IPC: H02M3/157 ,  G01R19/165 ,  H02M1/08 ,  H02M3/156 ,  H02M1/00

Abstract: A duty cycle estimation circuit includes a latch circuit that receives a clock signal for a voltage regulator. The latch circuit outputs a duty cycle estimate. The duty cycle estimation circuit also includes a low pass filter coupled to an output of the latch circuit to receive the duty cycle estimate. The duty cycle estimation circuit further includes a comparator that receives, as input, an output of the low pass filter and a voltage regulator output. The comparator feeds back a feedback signal to the latch circuit.