公开(公告)号：US20210218343A1

公开(公告)日：2021-07-15

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: H02M7/527 ,  H02M3/158 ,  H02M3/335

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.

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.