公开(公告)号：US20220302826A1

公开(公告)日：2022-09-22

申请号：US17203567

申请日：2021-03-16

Applicant: Apple Inc.

Inventor： Bogdan-Eugen Matei ,  Cristian Grecu ,  Fabio Ongaro ,  Giovanni Saccomanno ,  Siarhei Meliukh ,  Yesim Inam

IPC: H02M3/07

Abstract: A dual-stage boost converter is disclosed. The boost converter includes a charge pump and a boost stage. The charge pump is coupled between an input voltage source and the boost stage. The charge pump is coupled to receive the input voltage and configured to generate an intermediate voltage that is greater than the input voltage received from the input voltage source. The boost stage includes an inductor coupled to receive the intermediate voltage and is configured to generate an output voltage that is greater than or equal to the intermediate voltage.

公开(公告)号：US11264900B2

公开(公告)日：2022-03-01

申请号：US16793516

申请日：2020-02-18

Applicant: Apple Inc.

Inventor： Bogdan-Eugen Matei ,  Alessandro Molari ,  Fabio Ongaro ,  Giovanni Saccomanno ,  Hao Zhou

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

Abstract: The present disclosure is directed to a pulse frequency modulation (PFM) control method for a boost converter and apparatus for carrying out the method. A boost converter includes an inductor and a transistor coupled thereto. A control circuit is arranged to control the transistor to cause current pulsed to be sourced through the inductor. When operating in a PFM mode, the control circuit may control the timing of pulses such that, at the beginning of a specified time period, current pulses may be sourced with no spacing between successive pulses. After a desired number of pulses have been sourced, no pulses are sourced for the remainder of the specified time period. Nevertheless, the number of pulses sourced over the time period corresponds to a desired average frequency of pulses.

公开(公告)号：US11152846B2

公开(公告)日：2021-10-19

申请号：US16743443

申请日：2020-01-15

Applicant: Apple Inc.

Inventor： Bogdan-Eugen Matei ,  Alessandro S. Molari ,  Angelo Bassi ,  Fabio Ongaro ,  Giovanni Saccomanno

IPC: H02M3/156 ,  H02M1/00 ,  H02M3/158 ,  H02M3/155

Abstract: A DC-DC converter providing adaptive peak current control is disclosed. A DC-DC converter includes an inductor having first and second terminals coupled to a voltage source and a transistor, respectively. The DC-DC circuit further includes a control circuit configured to control activation of the transistor. A first control block of the control circuit controls the transistor (and thus the inductor peak current) using pulse frequency modulation (PFM). A second control block controls the transistor using pulse width modulation (PWM) and PFM. In a first mode of operation, the control circuit activates the transistor, using PFM, such that the peak-to-peak current through the inductor has a fixed value. In a second mode of operation, the control circuit activates the transistor such that the peak-to-peak current through the inductor is modulated, using both PWM and PFM.