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公开(公告)号：US12081134B2
公开(公告)日：2024-09-03
申请号：US18211318
申请日：2023-06-19
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
CPC classification number: H02M3/33592 , H02M3/33523 , H02M1/0009 , Y02B70/10
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
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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.
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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.
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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.
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公开(公告)号：US10008947B2
公开(公告)日：2018-06-26
申请号：US15202629
申请日：2016-07-06
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
CPC classification number: H02M3/33592 , H02M3/33523 , H02M2001/0009 , Y02B70/1475
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
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Patent Agency Ranking
公开(公告)号：US20170033698A1
公开(公告)日：2017-02-02
申请号：US15202629
申请日：2016-07-06
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
CPC classification number: H02M3/33592 , H02M3/33523 , H02M2001/0009 , Y02B70/1475
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
Abstract translation: 公开的示例包括反激式转换器，控制电路和便于次级侧调节输出电压的方法。 初级侧控制电路操作初级侧开关以独立地启动功率传递循环，以在第一模式中将功率输送到变压器次级绕组。 次级侧控制电路操作同步整流器或次级侧开关，以经由变压器辅助绕组产生预定的周期启动请求信号，以实现次级侧调节，并使初级侧控制器启动新的功率传输周期。
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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.
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公开(公告)号：US20230336089A1
公开(公告)日：2023-10-19
申请号：US18211318
申请日：2023-06-19
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
IPC: H02M3/335
CPC classification number: H02M3/33592 , H02M3/33523 , Y02B70/10 , H02M1/0009
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
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公开(公告)号：US11722067B2
公开(公告)日：2023-08-08
申请号：US15987493
申请日：2018-05-23
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
CPC classification number: H02M3/33592 , H02M3/33523 , H02M1/0009 , Y02B70/10
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
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公开(公告)号：US20180269797A1
公开(公告)日：2018-09-20
申请号：US15987493
申请日：2018-05-23
Applicant: Texas Instruments Incorporated
Inventor： Satish Kumar Vemuri , James M. Walden , Isaac Cohen
CPC classification number: H02M3/33592 , H02M3/33523 , H02M2001/0009 , Y02B70/1475
Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.
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