公开(公告)号：DE68921004T2

公开(公告)日：1995-09-21

申请号：DE68921004

申请日：1989-11-17

Applicant: SGS THOMSON MICROELECTRONICS ,  CONS RIC MICROELETTRONICA

Inventor： ZISA MICHELE ,  SCILLA GIUSEPPE ,  PALARA SERGIO

IPC: H01L29/78 ,  H01L27/02 ,  H01L27/04 ,  H03K17/08 ,  H03K17/082 ,  H03K17/14

Abstract: The device for protection against the short circuit of an MOS-type power device comprises at least one secondary branch circuit (2, 3) arranged in parallel with a main branch circuit (1) which includes the power transistor (T1). The secondary branch (2, 3) includes a control MOS transistor (T2, T3) having the same characteristics as the power transistor (T1) under control and the ability to conduct a current equal to a fraction of that flowing through the power transistor (T1). The gate of the control transistor (T2, T3) is connected directly with that of the power transistor (T1). The secondary branch also includes means (T4, T5, T6, R2, R3) sensitive to temperature which, in the case of a current flow corresponding to the short circuit current of the power transistor (T1), act on the gate common to the control and to the power transistors (T2, T3; T1) so as to lower its voltage and thus limit the conduction of same.

公开(公告)号：IT1226557B

公开(公告)日：1991-01-24

申请号：IT2156188

申请日：1988-07-29

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  PALARA SERGIO

IPC: H02H9/04 ,  H03K17/06 ,  H03K17/0814 ,  H03K17/567 ,  H03K17/687 ,  H03K17/695 ,  H03H

Abstract: The power device (2) has a power supply terminal (3), a load terminal (5) connected to earth by means of an inductive load (1) and a control terminal (6) connected to a circuit (7) with inlet (8) for an alternating control signal. Whenever the power device (2) is turned off, a switching element (10, 30) hitches the voltage of the control terminal (6) to that of the load terminal (5), which is forced to fall by the inductive load. There is provided a discharge circuit (2, 18, 19; 21, 22) of the inductive load (1), which includes means (18, 21) having a predetermined threshold which are fired when the voltage of the load terminal (5) falls down to said predetermined threshold.

公开(公告)号：IT8821561D0

公开(公告)日：1988-07-29

申请号：IT2156188

申请日：1988-07-29

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  PALARA SERGIO

IPC: H02H9/04 ,  H03K17/06 ,  H03K17/0814 ,  H03K17/567 ,  H03K17/687 ,  H03K17/695 ,  H03H

Abstract: The power device (2) has a power supply terminal (3), a load terminal (5) connected to earth by means of an inductive load (1) and a control terminal (6) connected to a circuit (7) with inlet (8) for an alternating control signal. Whenever the power device (2) is turned off, a switching element (10, 30) hitches the voltage of the control terminal (6) to that of the load terminal (5), which is forced to fall by the inductive load. There is provided a discharge circuit (2, 18, 19; 21, 22) of the inductive load (1), which includes means (18, 21) having a predetermined threshold which are fired when the voltage of the load terminal (5) falls down to said predetermined threshold.

公开(公告)号：DE69226004T2

公开(公告)日：1999-02-11

申请号：DE69226004

申请日：1992-07-17

Applicant: SGS THOMSON MICROELECTRONICS ,  CONS RIC MICROELETTRONICA

Inventor： ZISA MICHELE ,  BELLUSO MASSIMILIANO ,  PAPARO MARIO

IPC: H03K4/58 ,  H03K5/02 ,  H03K17/06 ,  H03F3/217 ,  H03K17/687 ,  H03K19/017

Abstract: In a bootstrap circuit for a power MOS transistor in the high driver configuration, comprising a first capacitor (C1) chargeable to a first voltage function of the supply voltage of the power transistor (T1), there is present a second capacitor (C2) combined with the first capacitor (C1) in such a way as to make available a second voltage higher than the first voltage and the threshold voltage of the power transistor (T1).

公开(公告)号：DE68924107D1

公开(公告)日：1995-10-12

申请号：DE68924107

申请日：1989-06-08

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  PALARA SERGIO

IPC: H02H9/04 ,  H03K17/06 ,  H03K17/0814 ,  H03K17/567 ,  H03K17/687 ,  H03K17/695 ,  H03K17/08

Abstract: The power device (2) has a power supply terminal (3), a load terminal (5) connected to earth by means of an inductive load (1) and a control terminal (6) connected to a circuit (7) with inlet (8) for an alternating control signal. Whenever the power device (2) is turned off, a switching element (10, 30) hitches the voltage of the control terminal (6) to that of the load terminal (5), which is forced to fall by the inductive load. There is provided a discharge circuit (2, 18, 19; 21, 22) of the inductive load (1), which includes means (18, 21) having a predetermined threshold which are fired when the voltage of the load terminal (5) falls down to said predetermined threshold.

公开(公告)号：DE68921004D1

公开(公告)日：1995-03-16

申请号：DE68921004

申请日：1989-11-17

Applicant: SGS THOMSON MICROELECTRONICS ,  CONS RIC MICROELETTRONICA

Inventor： ZISA MICHELE ,  SCILLA GIUSEPPE ,  PALARA SERGIO

IPC: H01L29/78 ,  H01L27/02 ,  H01L27/04 ,  H03K17/08 ,  H03K17/082 ,  H03K17/14

Abstract: The device for protection against the short circuit of an MOS-type power device comprises at least one secondary branch circuit (2, 3) arranged in parallel with a main branch circuit (1) which includes the power transistor (T1). The secondary branch (2, 3) includes a control MOS transistor (T2, T3) having the same characteristics as the power transistor (T1) under control and the ability to conduct a current equal to a fraction of that flowing through the power transistor (T1). The gate of the control transistor (T2, T3) is connected directly with that of the power transistor (T1). The secondary branch also includes means (T4, T5, T6, R2, R3) sensitive to temperature which, in the case of a current flow corresponding to the short circuit current of the power transistor (T1), act on the gate common to the control and to the power transistors (T2, T3; T1) so as to lower its voltage and thus limit the conduction of same.

公开(公告)号：DE68924107T2

公开(公告)日：1996-11-28

申请号：DE68924107

申请日：1989-06-08

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  PALARA SERGIO

IPC: H02H9/04 ,  H03K17/06 ,  H03K17/0814 ,  H03K17/567 ,  H03K17/687 ,  H03K17/695 ,  H03K17/08

Abstract: The power device (2) has a power supply terminal (3), a load terminal (5) connected to earth by means of an inductive load (1) and a control terminal (6) connected to a circuit (7) with inlet (8) for an alternating control signal. Whenever the power device (2) is turned off, a switching element (10, 30) hitches the voltage of the control terminal (6) to that of the load terminal (5), which is forced to fall by the inductive load. There is provided a discharge circuit (2, 18, 19; 21, 22) of the inductive load (1), which includes means (18, 21) having a predetermined threshold which are fired when the voltage of the load terminal (5) falls down to said predetermined threshold.

公开(公告)号：ITMI912045A1

公开(公告)日：1993-01-25

申请号：ITMI912045

申请日：1991-07-24

Applicant: CONS RIC MICROELETTRONICA ,  SGS THOMSON MICROELECTRONICS

Inventor： BELLUSO MASSIMILIANO ,  PAPARO MARIO ,  ZISA MICHELE

IPC: H03K20060101 ,  H03F3/217 ,  H03K4/58 ,  H03K5/02 ,  H03K17/06 ,  H03K17/687 ,  H03K19/017

公开(公告)号：ITMI912045D0

公开(公告)日：1991-07-24

申请号：ITMI912045

申请日：1991-07-24

Applicant: CONS RIC MICROELETTRONICA ,  SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  BELLUSO MASSIMILIANO ,  PAPARO MARIO

IPC: H03K4/58 ,  H03F3/217 ,  H03K5/02 ,  H03K17/06 ,  H03K17/687 ,  H03K19/017 ,  H03K

Abstract: In a bootstrap circuit for a power MOS transistor in the high driver configuration, comprising a first capacitor (C1) chargeable to a first voltage function of the supply voltage of the power transistor (T1), there is present a second capacitor (C2) combined with the first capacitor (C1) in such a way as to make available a second voltage higher than the first voltage and the threshold voltage of the power transistor (T1).