公开(公告)号：US12028066B2

公开(公告)日：2024-07-02

申请号：US18307994

申请日：2023-04-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kyoung Min Lee ,  James M. Walden ,  Brian Linehan ,  Yang Zhang

IPC: H03K19/003 ,  H03K17/081 ,  H03K17/0812 ,  H03K17/16

CPC classification number: H03K19/00384 ,  H03K17/08104 ,  H03K17/0812 ,  H03K17/08122 ,  H03K17/163 ,  H03K17/166

Abstract: In a transistor turnoff system, a transistor control circuit is configured to adjust a control voltage at a transistor control output responsive to a comparison signal at a control input. The control voltage has a slew rate. A comparator has a comparator output and first and second comparator inputs. The first comparator input is coupled to the transistor control output. The comparator is configured to: provide the comparison signal at the comparator output based on a reference voltage at the second comparator input; and deactivate the transistor control circuit by changing a state of the comparison signal responsive to the control voltage falling below the reference voltage. A slew-rate compensator is configured to increase the reference voltage by a compensation voltage that compensates for a time delay of the comparator or the transistor control circuit. The compensation voltage is proportional to the slew rate.

公开(公告)号：US20230261657A1

公开(公告)日：2023-08-17

申请号：US18307994

申请日：2023-04-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kyoung Min Lee ,  James M. Walden ,  Brian Linehan ,  Yang Zhang

IPC: H03K19/003 ,  H03K17/16 ,  H03K17/081 ,  H03K17/0812

CPC classification number: H03K19/00384 ,  H03K17/166 ,  H03K17/08104 ,  H03K17/08122 ,  H03K17/0812 ,  H03K17/163

Abstract: In a transistor turnoff system, a transistor control circuit is configured to adjust a control voltage at a transistor control output responsive to a comparison signal at a control input. The control voltage has a slew rate. A comparator has a comparator output and first and second comparator inputs. The first comparator input is coupled to the transistor control output. The comparator is configured to: provide the comparison signal at the comparator output based on a reference voltage at the second comparator input; and deactivate the transistor control circuit by changing a state of the comparison signal responsive to the control voltage falling below the reference voltage. A slew-rate compensator is configured to increase the reference voltage by a compensation voltage that compensates for a time delay of the comparator or the transistor control circuit. The compensation voltage is proportional to the slew rate.

公开(公告)号：US11671098B2

公开(公告)日：2023-06-06

申请号：US17700354

申请日：2022-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kyoung Min Lee ,  James M. Walden ,  Brian Linehan ,  Yang Zhang

IPC: H03K19/003 ,  H03K17/16 ,  H03K17/081 ,  H03K17/0812

CPC classification number: H03K19/00384 ,  H03K17/0812 ,  H03K17/08104 ,  H03K17/08122 ,  H03K17/163 ,  H03K17/166

Abstract: In a transistor turnoff system, a transistor control circuit is configured to adjust a control voltage at a transistor control output responsive to a comparison signal at a control input. The control voltage has a slew rate. A comparator has a comparator output and first and second comparator inputs. The first comparator input is coupled to the transistor control output. The comparator is configured to: provide the comparison signal at the comparator output based on a reference voltage at the second comparator input; and deactivate the transistor control circuit by changing a state of the comparison signal responsive to the control voltage falling below the reference voltage. A slew-rate compensator is configured to increase the reference voltage by a compensation voltage that compensates for a time delay of the comparator or the transistor control circuit. The compensation voltage is proportional to the slew rate.

公开(公告)号：US20220216872A1

公开(公告)日：2022-07-07

申请号：US17700354

申请日：2022-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kyoung Min Lee ,  James M. Walden ,  Brian Linehan ,  Yang Zhang

IPC: H03K19/003 ,  H03K17/16 ,  H03K17/081 ,  H03K17/0812

Abstract: In a transistor turnoff system, a transistor control circuit is configured to adjust a control voltage at a transistor control output responsive to a comparison signal at a control input. The control voltage has a slew rate. A comparator has a comparator output and first and second comparator inputs. The first comparator input is coupled to the transistor control output. The comparator is configured to: provide the comparison signal at the comparator output based on a reference voltage at the second comparator input; and deactivate the transistor control circuit by changing a state of the comparison signal responsive to the control voltage falling below the reference voltage. A slew-rate compensator is configured to increase the reference voltage by a compensation voltage that compensates for a time delay of the comparator or the transistor control circuit. The compensation voltage is proportional to the slew rate.