公开(公告)号：US11652479B2

公开(公告)日：2023-05-16

申请号：US17659226

申请日：2022-04-14

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Maiocchi ,  Ezio Galbiati ,  Michele Boscolo Berto ,  Maurizio Ricci

IPC: H03K17/687 ,  H02M3/157 ,  H02M1/00

CPC classification number: H03K17/6877 ,  H02M1/0025 ,  H02M3/157 ,  H03K17/6874

Abstract: A method of controlling a half-bridge circuit includes receiving an analog feedback signal proportional to an output of the half-bridge circuit, comparing the received analog feedback signal with a threshold value, selecting a digital feedback signal based on a result of the comparing, comparing the digital feedback signal with a digital reference signal to generate a digital error signal, integrating the digital error signal to generate an integration error signal, downscaling the integral error signal to generate a downscaled integration signal, sampling the downscaled integration signal to generate a sampled integration signal, and generating pulsed signals from the sampled integration signal to provide an input to the half-bridge circuit.

公开(公告)号：US11336280B2

公开(公告)日：2022-05-17

申请号：US17150156

申请日：2021-01-15

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Maiocchi ,  Ezio Galbiati ,  Michele Boscolo Berto ,  Maurizio Ricci

IPC: H03K17/687 ,  H02M3/157 ,  H02M1/00

Abstract: A half-bridge control circuit comprises an input terminal, an output terminal for providing a pulsed signal to a half-bridge driver circuit configured to drive two electronic switches connected between two supply terminals, and a feedback terminal for receiving a feedback signal indicative of the instantaneous voltage value at a switching node between the two electronic switches. A selector circuit provides a digital feedback signal. A subtractor generates an error signal by subtracting the digital feedback signal from the reference signal. An integrator generates an integration signal by integrating the value of the error signal. A down-scale circuit generates a reduced resolution integration signal by discarding one or more least significant bits of the integration signal. A sampling circuit generates a sampled integration signal by sampling the reduced resolution integration signal. A pulse generator circuit generates the pulsed signal as a function of the sampled integration signal.

公开(公告)号：US20210226624A1

公开(公告)日：2021-07-22

申请号：US17150156

申请日：2021-01-15

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Maiocchi ,  Ezio Galbiati ,  Michele Boscolo Berto ,  Maurizio Ricci

IPC: H03K17/687

Abstract: An embodiment half-bridge control circuit comprises an input terminal, an output terminal for providing a pulsed signal to a half-bridge driver circuit configured to drive two electronic switches connected between two supply terminals, and a feedback terminal for receiving a feedback signal indicative of the instantaneous voltage value at a switching node between the two electronic switches. A selector circuit provides a digital feedback signal. A subtractor generates an error signal by subtracting the digital feedback signal from the reference signal. An integrator generates an integration signal by integrating the value of the error signal. A down-scale circuit generates a reduced resolution integration signal by discarding one or more least significant bits of the integration signal. A sampling circuit generates a sampled integration signal by sampling the reduced resolution integration signal. A pulse generator circuit generates the pulsed signal as a function of the sampled integration signal.

公开(公告)号：US08873193B2

公开(公告)日：2014-10-28

申请号：US14013968

申请日：2013-08-29

Applicant: STMicroelectronics S.r.l.

Inventor： Ezio Galbiati

IPC: G11B21/02 ,  G11B21/12 ,  H02P6/18 ,  G11B5/54 ,  H02P25/02 ,  G11B19/20 ,  H02P6/24

CPC classification number: G11B19/2063 ,  G11B5/54 ,  G11B21/12 ,  H02P6/182 ,  H02P6/24 ,  H02P25/028 ,  H02P25/034

Abstract: A control circuit of a voice coil motor is configured to move at least one read/write head of an hard disk into a parking position. The control circuit compares a received supply signal with a reference signal having a minimum value and a maximum value and a frequency. When the value of the supply signal is between the minimum value and the maximum value of the reference signal, the controller causes alternation of a working condition of the voice coil motor, when the value of said supply signal is higher than the value of the reference signal, and of a stop condition of the voice coil motor, when the value of said supply signal is lower than the value of the reference signal, with a frequency equal to the frequency of said reference signal.

Abstract translation: 音圈电机的控制电路被配置为将至少一个硬盘的读/写头移动到停放位置。 控制电路将接收到的电源信号与具有最小值和最大值和频率的参考信号进行比较。 当供给信号的值在参考信号的最小值和最大值之间时，当所述供给信号的值高于参考值时，控制器使音圈马达的工作状态发生变化 信号和音圈电动机的停止状态，当所述电源信号的值低于参考信号的值时，其频率等于所述参考信号的频率。