公开(公告)号：US20250015708A1

公开(公告)日：2025-01-09

申请号：US18218750

申请日：2023-07-06

Applicant: STMicroelectronics S.r.l. ,  Politecnico Di Milano

Inventor： Lorenzo CREMONESI ,  Paolo MELILLO ,  Alessandro GASPARINI ,  Massimo GHIONI ,  Salvatore LEVANTINO

IPC: H02M1/088 ,  H02M3/158

Abstract: Disclosed herein is a DC-DC converter, including a high-side power switch coupled between an input voltage and a switched node and a low-side power switch coupled between the switched node and ground. An inductor is coupled between the switched node and an output node. An output capacitor is coupled between the output node and ground. A control circuit is configured to operate the high-side power switch in a constant charge mode of operation to vary on-time of the high-side power switch to maintain a constant amount of charge being transferred to the output capacitor during each charging cycle, independent of variation of the input voltage.

公开(公告)号：US20230336078A1

公开(公告)日：2023-10-19

申请号：US18132774

申请日：2023-04-10

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro BERTOLINI ,  Alessandro GASPARINI ,  Paolo MELILLO ,  Salvatore LEVANTINO ,  Massimo GHIONI

IPC: H02M3/158 ,  H02M1/00 ,  H02M3/157

CPC classification number: H02M3/158 ,  H02M1/0095 ,  H02M3/157

Abstract: In a multi-level hybrid DC-DC converter with a flying capacitor, a feedback circuit includes a first oscillator and produces a first clock signal with a frequency dependent on an output voltage. A second oscillator produces a second clock signal having a frequency dependent on a reference voltage. A logic circuit switches, as a function of the first and second clock signals, connection of the flying capacitor between one state where the flying capacitor is connected between an input node and a switching node, and another state where the capacitor is connected between the switching node and a ground node. The duty cycle of the first/second clock signal varies so that when the flying capacitor voltage is lower than a target voltage a duration of the one state is increased, and when the flying capacitor voltage is higher than the target voltage a duration of the another state is increased.

公开(公告)号：US20240128871A1

公开(公告)日：2024-04-18

申请号：US18376277

申请日：2023-10-03

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro BERTOLINI ,  Alessandro GASPARINI ,  Paolo MELILLO ,  Salvatore LEVANTINO ,  Massimo GHIONI

IPC: H02M3/158 ,  H02M3/157

CPC classification number: H02M3/158 ,  H02M3/157

Abstract: A boost DC-DC converter includes a switching network, coupled to an inductor, controlled by a PWM driving signal. A control loop receives a voltage output and provides the PWM driving signal. The control loop generates an error signal as a function of a difference between voltage output voltage and a reference, with the PWM driving signal generated based on the error signal. A low pass filter circuit within the control loop receives the PWM driving signal and provides at least one filtered signal. An adder node of the control loop receives the at least one filtered signal from the low pass filter circuit for addition to the at least one filtered signal. The PWM driving signal is generated as a function of a sum of the filtered signal and the error signal.