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.

公开(公告)号：US20180309443A1

公开(公告)日：2018-10-25

申请号：US15492256

申请日：2017-04-20

Applicant: Texas Instruments Incorporated ,  Texas Instruments Deutschland GmbH

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.

公开(公告)号：US20160214140A1

公开(公告)日：2016-07-28

申请号：US15089752

申请日：2016-04-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Maurizio Granato ,  Giovanni Frattini ,  Roberto Massolini

IPC: B06B1/02

CPC classification number: B06B1/0284 ,  B06B1/0292 ,  H04R1/00 ,  H04R3/06 ,  H04R2217/03

Abstract: A transducer has an input and produces a mechanical output, wherein the magnitude of the mechanical output of the transducer is dependent on the frequency and magnitude of current at the input. A driver for the transducer includes a device having a transfer function associated with the device, the device having a device input and a device output, the device output being connectable to the input of the transducer and the device input being connectable to a power source. The device attenuates the current output at a frequency that causes a peak in the magnitude of the mechanical output of the transducer.

Abstract translation: 换能器具有输入并产生机械输出，其中换能器的机械输出的大小取决于输入端的电流的频率和幅度。 用于换能器的驱动器包括具有与装置相关联的传递功能的装置，所述装置具有装置输入和装置输出，所述装置输出可连接到所述换能器的输入端，所述装置输入可连接到电源。 该器件以导致换能器的机械输出大小的峰值的频率衰减电流输出。

公开(公告)号：US09338533B2

公开(公告)日：2016-05-10

申请号：US14204280

申请日：2014-03-11

Applicant: Texas Instruments Incorporated

Inventor： Maurizio Granato ,  Giovanni Frattini ,  Roberto Giampiero Massolini

IPC: H04R25/00 ,  H04R1/00

CPC classification number: B06B1/0284 ,  B06B1/0292 ,  H04R1/00 ,  H04R3/06 ,  H04R2217/03

Abstract: A transducer has an input and produces a mechanical output, wherein the magnitude of the mechanical output of the transducer is dependent on the frequency and magnitude of current at the input. A driver for the transducer includes a device having a transfer function associated with the device, the device having a device input and a device output, the device output being connectable to the input of the transducer and the device input being connectable to a power source. The device attenuates the current output at a frequency that causes a peak in the magnitude of the mechanical output of the transducer.

Abstract translation: 换能器具有输入并产生机械输出，其中换能器的机械输出的大小取决于输入端的电流的频率和幅度。 用于换能器的驱动器包括具有与装置相关联的传递功能的装置，所述装置具有装置输入和装置输出，所述装置输出可连接到所述换能器的输入端，所述装置输入可连接到电源。 该器件以导致换能器的机械输出大小的峰值的频率衰减电流输出。

公开(公告)号：US10454369B2

公开(公告)日：2019-10-22

申请号：US15591107

申请日：2017-05-10

Applicant: Texas Instruments Incorporated

Inventor： Filip Savic ,  Giacomo Calabrese ,  Giovanni Frattini

IPC: H02M3/156 ,  H02M1/00

Abstract: A switched voltage converter may be controlled with load current feedforward control loop in addition to an output voltage feedback loop. The converter includes a first switch device that is controlled to open and close at a selected switching rate with a selected duty cycle. The first switch device is coupled in series with an inductor and conducts current through the inductor while the first switch is closed. A second switch device conducts current from the inductor to an output capacitor and to load while the first switch is open to produce an output voltage and a resulting load current through the load. The load current is measured in a continuous manner and a load current feedforward control signal is generated that is representative of the load current. The switch rate and/or duty cycle of the first switch is adjusted in response to the load current feedforward control signal.

公开(公告)号：US10432102B2

公开(公告)日：2019-10-01

申请号：US15712330

申请日：2017-09-22

Applicant: Texas Instruments Incorporated

Inventor： Pierluigi Albertini ,  Maurizio Granato ,  Giacomo Calabrese ,  Roberto Giampiero Massolini ,  Joyce Marie Mullenix ,  Giovanni Frattini

IPC: H02M3/335 ,  H03L7/08 ,  H02M1/00

Abstract: Disclosed examples include isolated dual active bridge (DAB) DC to DC converters with first and second bridge circuits, a transformer with a sense coil, and a secondary side control circuit to provide secondary side switching control signals to regulate an output voltage or current signal by controlling a phase shift angle between switching transitions of the secondary side switching control signals and switching transitions of a secondary side clock signal, where the secondary side control circuit includes a clock recovery circuit to synchronize the secondary side clock signal to transitions in a sense coil voltage signal of the sense coil.

公开(公告)号：US20190229637A1

公开(公告)日：2019-07-25

申请号：US16367691

申请日：2019-03-28

Applicant: Texas Instruments Incorporated

Inventor： Pierluigi Albertini ,  Maurizio Granato ,  Giacomo Calabrese ,  Roberto Giampiero Massolini ,  Joyce Marie Mullenix ,  Giovanni Frattini

IPC: H02M3/335 ,  H03L7/08

Abstract: Disclosed examples include isolated dual active bridge (DAB) DC to DC converters with first and second bridge circuits, a transformer with a sense coil, and a secondary side control circuit to provide secondary side switching control signals to regulate an output voltage or current signal by controlling a phase shift angle between switching transitions of the secondary side switching control signals and switching transitions of a secondary side clock signal, where the secondary side control circuit includes a clock recovery circuit to synchronize the secondary side clock signal to transitions in a sense coil voltage signal of the sense coil.

公开(公告)号：US20190097544A1

公开(公告)日：2019-03-28

申请号：US15712330

申请日：2017-09-22

Applicant: Texas Instruments Incorporated

Inventor： Pierluigi Albertini ,  Maurizio Granato ,  Giacomo Calabrese ,  Roberto Giampiero Massolini ,  Joyce Marie Mullenix ,  Giovanni Frattini

IPC: H02M3/335 ,  H03L7/08

CPC classification number: H02M3/33592 ,  H02M3/33584 ,  H02M2001/0003 ,  H03L7/0807

Abstract: Disclosed examples include isolated dual active bridge (DAB) DC to DC converters with first and second bridge circuits, a transformer with a sense coil, and a secondary side control circuit to provide secondary side switching control signals to regulate an output voltage or current signal by controlling a phase shift angle between switching transitions of the secondary side switching control signals and switching transitions of a secondary side clock signal, where the secondary side control circuit includes a clock recovery circuit to synchronize the secondary side clock signal to transitions in a sense coil voltage signal of the sense coil.

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.

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

IPC: H02M3/335 ,  H02M1/08

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.