公开(公告)号：IT1318794B1

公开(公告)日：2003-09-10

申请号：ITMI20001922

申请日：2000-08-29

Applicant: ST MICROELECTRONICS SRL

Inventor： BELLONO IGNAZIO ,  CORVA GIULIO ,  VILLA FANCESCO

IPC: H03K17/0412 ,  H03K17/0814 ,  H03K17/687

公开(公告)号：IT1317125B1

公开(公告)日：2003-05-27

申请号：ITMI20000444

申请日：2000-03-07

Applicant: ST MICROELECTRONICS SRL

Inventor： CORVA GIULIO ,  CAMERA ALESSANDRO ,  BELLOMO IGNAZIO

IPC: H02M3/156 ,  H02M3/158

Abstract: The invention relates to a control circuit for a hysteretic switching voltage regulator, which comprises a logic circuit driving an output stage; a hysteresis comparator comparing the voltage value at the output of the regulator with a reference voltage; a current sensor for sensing, through a comparator, the current drain of a load connected to the output of the regulator. This control circuit further comprises a device for adjusting the hysteresis range of the hysteresis comparator, and a hysteresis frequency sensing and controlling logic portion connected to the output of the hysteresis comparator, the logic portion acting on the frequency adjusting device.

公开(公告)号：ITMI20010057A1

公开(公告)日：2002-07-15

申请号：ITMI20010057

申请日：2001-01-15

Applicant: ST MICROELECTRONICS SRL

Inventor： BELLOMO IGNAZIO ,  CORVA GIULIO

IPC: G05F1/46

Abstract: The present invention relates a monostable circuit adapted to provide a delay having a length inversely proportional to an input signal, characterized by comprising generating means (21, 22) adapted to generate a signal proportionally to an input signal (Vin) and to a corrective factor (35), comparing means (23) adapted to compare the value of said signal with a prefixed value range (Imin, Imax) and correcting means (24) adapted to correct said corrective factor (35) in the case that the value of said signal is out of said prefixed value range (Imin, Imax).

公开(公告)号：ITMI20001922A1

公开(公告)日：2002-03-01

申请号：ITMI20001922

申请日：2000-08-29

Applicant: ST MICROELECTRONICS SRL

Inventor： BELLOMO IGNAZIO ,  CORVA GIULIO ,  VILLA FRANCESCO

IPC: H03K17/0412 ,  H03K17/0814 ,  H03K17/687

Abstract: A driver circuit drives at least one power switch, which circuit comprises a final stage including a complementary pair of power transistors connected to said switch at a common output node. Advantageously, this circuit comprises a respective power-on buffer stage, connected in upstream of each of the power transistors, and a power-on detector associated with each power transistor, the detector associated with one of the power transistors being connected to the buffer stage of the complementary one of the transistors to prevent the power transistors from being turned on simultaneously.

公开(公告)号：ITVA20020038A1

公开(公告)日：2003-12-01

申请号：ITVA20020038

申请日：2002-05-30

Applicant: ST MICROELECTRONICS SRL

Inventor： CORVA GIULIO ,  MARIANI ADALBERTO

IPC: H02M3/156 ,  H02M3/158

Abstract: A circuit device generates a signal proportional to the current circulating in an inductor and a current comparator, which is disabled by a stand-by signal, and is input with a feedback signal and with a signal proportional to the current circulating in the inductor and generates a logic comparison signal. A control logic, input with a logic comparison signal and the stand-by signal, drives the switch or the switches of a power stage. A clamp, connected in parallel to a capacitive branch, makes the feedback signal greater than a certain minimum threshold, to make the current that is delivered to the load, when the regulator is not in the stand-by state, greater than a certain minimum current.

公开(公告)号：ITMI20000444A1

公开(公告)日：2001-09-07

申请号：ITMI20000444

申请日：2000-03-07

Applicant: ST MICROELECTRONICS SRL

Inventor： CAMERA ALESSANDRO ,  BELLOMO IGNAZIO ,  CORVA GIULIO

IPC: H02M3/156 ,  H02M3/158

Abstract: The invention relates to a control circuit for a hysteretic switching voltage regulator, which comprises a logic circuit driving an output stage; a hysteresis comparator comparing the voltage value at the output of the regulator with a reference voltage; a current sensor for sensing, through a comparator, the current drain of a load connected to the output of the regulator. This control circuit further comprises a device for adjusting the hysteresis range of the hysteresis comparator, and a hysteresis frequency sensing and controlling logic portion connected to the output of the hysteresis comparator, the logic portion acting on the frequency adjusting device.

公开(公告)号：ITMI20001922D0

公开(公告)日：2000-08-29

申请号：ITMI20001922

申请日：2000-08-29

Applicant: ST MICROELECTRONICS SRL

Inventor： BELLOMO IGNAZIO ,  CORVA GIULIO ,  VILLA FRANCESCO

IPC: H03K17/0412 ,  H03K17/0814 ,  H03K17/687

公开(公告)号：ITMI20000444D0

公开(公告)日：2000-03-07

申请号：ITMI20000444

申请日：2000-03-07

Applicant: ST MICROELECTRONICS SRL

Inventor： CAMERA ALESSANDRO ,  BELLOMO IGNAZIO ,  CORVA GIULIO

IPC: H02M3/156 ,  H02M3/158

Abstract: The invention relates to a control circuit for a hysteretic switching voltage regulator, which comprises a logic circuit driving an output stage; a hysteresis comparator comparing the voltage value at the output of the regulator with a reference voltage; a current sensor for sensing, through a comparator, the current drain of a load connected to the output of the regulator. This control circuit further comprises a device for adjusting the hysteresis range of the hysteresis comparator, and a hysteresis frequency sensing and controlling logic portion connected to the output of the hysteresis comparator, the logic portion acting on the frequency adjusting device.