公开(公告)号：US20240421708A1

公开(公告)日：2024-12-19

申请号：US18334708

申请日：2023-06-14

Applicant: STMicroelectronics International N.V.

Inventor： Niccolo' Brambilla ,  Stefano Corona ,  Sandro Rossi ,  Valeria Bottarel ,  Fulvio Ottavio Lissoni

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/088

Abstract: An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter including: a comparator configured to generate a comparator output signal by comparing a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in the comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier configured to generate, at an output terminal of the transconductance amplifier, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between the output terminal of the transconductance amplifier and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the transconductance amplifier and a ramp voltage generated by the ramp signal generator.

公开(公告)号：US20240421691A1

公开(公告)日：2024-12-19

申请号：US18334757

申请日：2023-06-14

Applicant: STMicroelectronics International N.V.

Inventor： Niccolo' Brambilla ,  Sandro Rossi ,  Valeria Bottarel ,  Stefano Corona ,  Fulvio Ottavio Lissoni

IPC: H02M1/088 ,  H02M3/157 ,  H02M3/158

Abstract: An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter, including: a comparator configured to compare a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in a comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier (TA) configured to generate, at an output terminal of the TA, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between an output terminal of the TA and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the TA and a ramp voltage having a gradient proportional to a switching frequency of the Buck converter.