公开(公告)号：US20250132596A1

公开(公告)日：2025-04-24

申请号：US18382776

申请日：2023-10-23

Applicant: STMicroelectronics International N.V.

Inventor： Domenico RAGONESE ,  Marco MINIERI ,  Maurizio GRECO ,  Vincenzo MARANO ,  Vojtech ELIAS ,  Milos HOFMAN

IPC: H02J7/34 ,  H02J7/00

Abstract: A power-management system includes a power transistor coupled between a power supply and load, a driver circuit driving the power transistor in response to an input signal, and an error amplifier generating a control signal that modifies operation of the driver circuit based on a comparison between a selected reference voltage and a drain-to-source voltage of the power transistor. A multiplexer provides the selected reference voltage to the error amplifier and passes one of a plurality of different reference voltages as the selected reference voltage based upon first and second selection signals. A first selection circuit charges a first capacitor in response to the input signal and generates the first selection signal based on a first voltage across the first capacitor. A second selection circuit charges a second capacitor in response to the input signal and generates the second selection signal based on a second voltage across the second capacitor.

公开(公告)号：US20240348242A1

公开(公告)日：2024-10-17

申请号：US18627197

申请日：2024-04-04

Applicant: STMicroelectronics International N.V.

Inventor： Enrico POLI ,  Vincenzo MARANO ,  Andrija FEHER ,  Pekka Sakari ALASAARI

IPC: H03K17/082 ,  H03K17/22 ,  H03K19/21

CPC classification number: H03K17/082 ,  H03K17/22 ,  H03K19/21 ,  H03K2217/0063 ,  H03K2217/0072

Abstract: A safety circuit for a gate driver device receives PWM driving signals, a system supply voltage, as well as first and second safety signals. The circuit includes a first logic circuit configured to propagate the PWM driving signals to produce gate driving signals if the first safety signal is de-asserted, and disable propagation of the PWM driving signals and de-assert the gate driving signals if the first safety signal is asserted. The circuit includes a second logic circuit configured to couple a power supply output node to the system supply voltage to produce a driver supply voltage if the second safety signal is de-asserted, and decouple the power supply output node from the system supply voltage if the second safety signal is asserted.