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公开(公告)号：US10135439B2
公开(公告)日：2018-11-20
申请号：US15492256
申请日：2017-04-20
Applicant: Texas Instruments Incorporated
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K5/08 , H03K17/691 , H03K19/00
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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公开(公告)号：US20180152109A1
公开(公告)日：2018-05-31
申请号：US15363188
申请日：2016-11-29
Applicant: Texas Instruments Incorporated
Inventor： Shailendra Kumar Baranwal , Maurizio Granato , Giovanni Frattini
CPC classification number: H02M3/33592 , H02M1/08 , H02M3/33553 , H02M2001/0058
Abstract: An electronic device, which includes an H-bridge circuit and a miniaturized transformer that is coupled to operate at VHF frequency, and a driver circuit for an n-type power transistor of the H-bridge circuit are disclosed. The driver circuit includes a first p-type transistor and an n-type transistor coupled between an upper rail and a lower rail, with an output taken between the drains of the first p-type transistor and the n-type transistor being coupled to a gate of the n-type power transistor. The driver circuit also includes a sample-and-hold capacitor coupled to capture a drain voltage for the first n-type power transistor on a first edge of a control signal for the first n-type power transistor and a comparator coupled to compare the captured drain voltage to a lower rail on a given edge of a clock signal and to provide a comparator value. The driver circuit also includes an up/down counter, which is coupled to receive the comparator value, to adjust a counter value responsive to receiving the comparator value and to output the counter value, and a first timing circuit that is coupled to receive the counter value and to send an adjustable pulse towards a gate of the first p-type transistor and a gate of the n-type transistor.
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公开(公告)号：US20180041130A1
公开(公告)日：2018-02-08
申请号：US15669345
申请日：2017-08-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Keith Edmund Kunz , Anant Kamath , Maurizio Granato , Prajkta Vyavahare
CPC classification number: H02M3/33507 , H02M1/32 , H02M3/33523
Abstract: Methods and systems for providing electrical power using an isolated DC-DC converter, including the actions of: a) providing current to a primary side of a transformer at multiple predetermined open loop current levels using a power supply, said power supply providing said open loop current levels in increasing amplitude order and at predetermined times, said open loop current levels and times being selected to ramp a voltage across output terminals connected to a secondary side of said transformer so that after said power supply provides a maximum one of said open loop current levels, said voltage reaches a threshold sufficient to enable a closed loop controller connected to said output terminals to send a feedback signal to said primary side, said threshold being insufficient to fully power said output terminals; and b) sending said feedback signal to said primary side using said closed loop controller when said voltage reaches said threshold, said power supply controlled in response to said feedback signal to continue providing current to said primary side at closed loop current levels, said feedback signal selected to control said power supply to increase said closed loop current levels until said output terminals are fully powered.
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公开(公告)号：US20160329815A1
公开(公告)日：2016-11-10
申请号：US14984076
申请日：2015-12-30
Applicant: Texas Instruments Incorporated
Inventor： Roberto Giampiero Massolini , Maurizio Granato , Giovanni Frattini
IPC: H02M3/335
CPC classification number: H02M3/33507 , H02M3/158 , H02M2001/008 , H02M2001/009
Abstract: Disclosed examples include multiple output DC to DC converters with a buck converter including a half bridge switching circuit and transformer primary winding to provide a first output voltage signal, as well as a boost converter to provide an isolated second output voltage signal. The boost converter includes a transformer secondary winding magnetically coupled with the primary winding to provide a boost converter inductor, a switching circuit, an output diode providing the second output voltage signal, and a PWM controller that synchronizes the boost converter switching with the low side switch of the buck converter based on a sensed voltage of the transformer secondary winding.
Abstract translation: 公开的示例包括具有包括半桥开关电路和变压器初级绕组的降压转换器的多输出DC至DC转换器，以提供第一输出电压信号，以及提供隔离的第二输出电压信号的升压转换器。 升压转换器包括与初级绕组磁耦合的变压器次级绕组，以提供升压转换器电感器，开关电路，提供第二输出电压信号的输出二极管和将升压转换器开关与低压开关同步的PWM控制器 基于感测到的变压器次级绕组的电压的降压转换器。
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公开(公告)号：US11336193B2
公开(公告)日：2022-05-17
申请号：US16822268
申请日：2020-03-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Maurizio Granato , Giovanni Frattini , Shailendra Kumar Baranwal
Abstract: In described examples, an isolated DC-DC converter includes: an input node for receiving an input voltage; a transformer including a primary side having first and second terminals and a primary side ground; and first and second low-side switches. The first low-side switch is coupled between the first terminal and the primary side ground. The second low-side switch is coupled between the second terminal and the primary side ground. A first voltage is across the first low-side switch, and a second voltage is across the second low-side switch. Also, the isolated DC-DC converter includes first and second high-side switches. The first high-side switch is coupled between the first terminal and the input node. The second high-side switch is coupled between the second terminal and the input node. Further, the isolated DC-DC converter includes a switch controller.
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Patent Agency Ranking
公开(公告)号：US10903746B2
公开(公告)日：2021-01-26
申请号：US15669345
申请日：2017-08-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Keith Edmund Kunz , Anant Kamath , Maurizio Granato , Prajkta Vyavahare
Abstract: Methods and systems for providing electrical power using an isolated DC-DC converter include: using a power supply to provide multiple amplitudes of open loop current to a primary side of a transformer. The amplitudes are selected to increase stepwise, at predetermined times, to ramp a voltage across output terminals connected to a secondary side of said transformer so that after said power supply provides a maximum open loop current amplitude, said voltage reaches a threshold sufficient to enable a closed loop controller connected to said output terminals to send a feedback signal to said primary side. The threshold voltage is insufficient to fully power said output terminals. The feedback signal is selected to control said power supply to increase current to said primary side at closed loop current levels until said output terminals are fully powered.
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公开(公告)号：US10812070B2
公开(公告)日：2020-10-20
申请号：US16555350
申请日：2019-08-29
Applicant: Texas Instruments Incorporated
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K19/00 , H03K17/691 , H03K5/08
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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公开(公告)号：US10439608B2
公开(公告)日：2019-10-08
申请号：US16161128
申请日：2018-10-16
Applicant: Texas Instruments Incorporated
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K19/00 , H03K17/691 , H03K5/08
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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公开(公告)号：US20190052262A1
公开(公告)日：2019-02-14
申请号：US16161124
申请日：2018-10-16
Applicant: Texas Instruments Incorporated
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K17/691 , H03K5/08 , H03K19/00
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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公开(公告)号：US20180309443A1
公开(公告)日：2018-10-25
申请号：US15492256
申请日：2017-04-20
Inventor： Giacomo Calabrese , Maurizio Granato , Giovanni Frattini
IPC: H03K17/691 , H03K5/08 , H03K19/00
CPC classification number: H03K17/691 , H03K5/08 , H03K19/0005
Abstract: Disclosed examples include isolated load switch driver circuits to drive a load, including an impedance circuit that receives a digital input voltage signal from a signal source, and selectively allows a current signal to flow from the signal source to charge a buffer capacitor. An impedance control circuit controls the impedance circuit to limit the current signal in response to the buffer capacitor reaching a first threshold voltage, and an output circuit provides an output isolated from the digital input voltage signal to switch the load. A signaling circuit selectively enables the output circuit to draw power from the buffer capacitor in response to the voltage of the buffer capacitor reaching the first threshold voltage.
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