公开(公告)号：JPH1014250A

公开(公告)日：1998-01-16

申请号：JP7136897

申请日：1997-03-25

Applicant: INT RECTIFIER CORP

Inventor： DUBHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567 ,  H02M7/48 ,  H02M7/5387

Abstract: PROBLEM TO BE SOLVED: To obtain a driver circuit protected against an uncontrollable current in an integrated circuit, causing breakdown of a switching transistor by providing a switching transistor on the bottom rail with a discrete Kelvin emitter, for decreasing the parasitic inductance. SOLUTION: Each switching transistor Q2 , Q4 , Q6 on the bottom rail is provided with a discrete Kelvin emitter to the COM terminal of an integrated circuit. Consequently, the parasitic inductances L2 , L4 , L6 of an emitter lead are significantly decreased (typically, on the order of subnano H). In practice, this is achieved through discrete connection from a common point or the anode of a diode. More specifically, a first reference is present in the connection with each of three IGBTs on the low side. Parasitic inductance in the high current path of driver circuits A-D can be decreased by connecting a trace as close to the element as possible.

公开(公告)号：GB2311669A

公开(公告)日：1997-10-01

申请号：GB9705901

申请日：1997-03-21

Applicant: INT RECTIFIER CORP

Inventor： DABHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567 ,  H02M1/00 ,  H03K17/08

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.

公开(公告)号：ITMI970507A1

公开(公告)日：1998-09-07

申请号：ITMI970507

申请日：1997-03-07

Applicant: INT RECTIFIER CORP

Inventor： DABHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.

公开(公告)号：IT1290577B1

公开(公告)日：1998-12-10

申请号：ITMI970507

申请日：1997-03-07

Applicant: INT RECTIFIER CORP

Inventor： DABHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.

公开(公告)号：GB2311669B

公开(公告)日：2000-05-10

申请号：GB9705901

申请日：1997-03-21

Applicant: INT RECTIFIER CORP

Inventor： DABHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567 ,  H02M1/00 ,  H03K17/08

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.

公开(公告)号：SG66357A1

公开(公告)日：1999-07-20

申请号：SG1997000699

申请日：1997-03-12

Applicant: INT RECTIFIER CORP

Inventor： DABHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567 ,  H02M1/00 ,  H02M7/5387 ,  H03K17/08

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.

公开(公告)号：DE19709233A1

公开(公告)日：1997-10-30

申请号：DE19709233

申请日：1997-03-06

Applicant: INT RECTIFIER CORP

Inventor： DUBHASHI AJIT ,  FURE TYLER

IPC: H03K17/16 ,  H03K17/567 ,  H03K17/042

Abstract: In a motor controller circuit, an integrated circuit driver drives a plurality of switching transistors which are organized along a top rail and a bottom rail. To reduce the conduction of current through the parasitic diode DS1 of the integrated circuit, the switching transistors at the bottom rail are provided with individual Kelvin emitter connections, which reduce the parasitic internal inductances, which otherwise produce highly negative voltages when the top rail transistors are turned off. Further, individual traces are provided on the printed circuit board from the COM terminal to the Kelvin emitters. Finally, a small resistance is provided in series with each Kelvin emitter connection which increases the resistance in series with the parasitic diodes and hence reduces the current flowing in the parasitic diodes.