公开(公告)号：US11463000B2

公开(公告)日：2022-10-04

申请号：US17138660

申请日：2020-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Haoquan Zhang ,  Yogesh Kumar Ramadass

IPC: H02M3/07 ,  G01D11/00 ,  H03M1/12 ,  H02J50/05

Abstract: Capacitively isolated current-loaded or current-driven charge pump circuits and related methods transfer electrical energy from a primary side to a secondary side over a capacitive isolation boundary, using a controlled current source to charge isolation capacitors with constant current, as opposed to current impulses, while maintaining output voltage within tolerance. The charge pump circuits provide DC-to-DC converters that can be used in isolated power supplies, particularly in low-power applications and in such devices as sensor transmitters that have separate electrical ground planes. The devices and methods transfer electrical energy over an isolated capacitive barrier in a manner that is efficient, inexpensive, and reduces electromagnetic interference (EMI).

公开(公告)号：US11616433B2

公开(公告)日：2023-03-28

申请号：US17223786

申请日：2021-04-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Yogesh Kumar Ramadass ,  Manish Bhardwaj

IPC: H02M1/44 ,  H02M1/00 ,  H02M3/335 ,  H02M1/12

Abstract: In a described example, a circuit includes a sensor, a controller and an amplifier. The sensor has a sensor input and a sensor output. The sensor input is adapted to be coupled to a chassis of a switch-mode power supply (SMPS). The controller has an input, a timing output and a level output. The input of the control circuit is coupled to the sensor output. The amplifier has a timing control input, a level control input and an amplifier output. The level control input is coupled to the level output of the controller. The timing control input is coupled to the timing output, and the amplifier output is coupled to the sensor input. The amplifier is configured to provide compensation pulses at the amplifier output having magnitude and timing to reduce common-mode noise on the chassis.

公开(公告)号：US20210305893A1

公开(公告)日：2021-09-30

申请号：US17138660

申请日：2020-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Haoquan Zhang ,  Yogesh Kumar Ramadass

IPC: H02M3/07 ,  H02J50/05 ,  H03M1/12 ,  G01D11/00

Abstract: Capacitively isolated current-loaded or current-driven charge pump circuits and related methods transfer electrical energy from a primary side to a secondary side over a capacitive isolation boundary, using a controlled current source to charge isolation capacitors with constant current, as opposed to current impulses, while maintaining output voltage within tolerance. The charge pump circuits provide DC-to-DC converters that can be used in isolated power supplies, particularly in low-power applications and in such devices as sensor transmitters that have separate electrical ground planes. The devices and methods transfer electrical energy over an isolated capacitive barrier in a manner that is efficient, inexpensive, and reduces electromagnetic interference (EMI).

公开(公告)号：US11817779B2

公开(公告)日：2023-11-14

申请号：US17958989

申请日：2022-10-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Haoquan Zhang ,  Yogesh Kumar Ramadass

IPC: H02M3/07 ,  G01D11/00 ,  H03M1/12 ,  H02J50/05

CPC classification number: H02M3/07 ,  G01D11/00 ,  H02J50/05 ,  H03M1/12

Abstract: Capacitively isolated current-loaded or current-driven charge pump circuits and related methods transfer electrical energy from a primary side to a secondary side over a capacitive isolation boundary, using a controlled current source to charge isolation capacitors with constant current, as opposed to current impulses, while maintaining output voltage within tolerance. The charge pump circuits provide DC-to-DC converters that can be used in isolated power supplies, particularly in low-power applications and in such devices as sensor transmitters that have separate electrical ground planes. The devices and methods transfer electrical energy over an isolated capacitive barrier in a manner that is efficient, inexpensive, and reduces electromagnetic interference (EMI).

公开(公告)号：US20230028100A1

公开(公告)日：2023-01-26

申请号：US17958989

申请日：2022-10-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Haoquan Zhang ,  Yogesh Kumar Ramadass

IPC: H02M3/07 ,  G01D11/00 ,  H03M1/12 ,  H02J50/05

Abstract: Capacitively isolated current-loaded or current-driven charge pump circuits and related methods transfer electrical energy from a primary side to a secondary side over a capacitive isolation boundary, using a controlled current source to charge isolation capacitors with constant current, as opposed to current impulses, while maintaining output voltage within tolerance. The charge pump circuits provide DC-to-DC converters that can be used in isolated power supplies, particularly in low-power applications and in such devices as sensor transmitters that have separate electrical ground planes. The devices and methods transfer electrical energy over an isolated capacitive barrier in a manner that is efficient, inexpensive, and reduces electromagnetic interference (EMI).

公开(公告)号：US20240079958A1

公开(公告)日：2024-03-07

申请号：US18506337

申请日：2023-11-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Kumar ,  Haoquan Zhang ,  Yogesh Kumar Ramadass

IPC: H02M3/07 ,  G01D11/00 ,  H02J50/05 ,  H03M1/12

CPC classification number: H02M3/07 ,  G01D11/00 ,  H02J50/05 ,  H03M1/12

Abstract: In one example, an apparatus comprises: a primary side bridge coupled between a power input and a first ground terminal, the primary side bridge having first switching terminals coupled to first capacitor terminals; and a secondary side bridge coupled between a power output and a second ground terminal, the secondary side bridge having second switching terminals coupled to second capacitor terminals.

公开(公告)号：US20240072652A1

公开(公告)日：2024-02-29

申请号：US17897406

申请日：2022-08-29

Applicant: Texas Instruments Incorporated

Inventor： Yogesh Ramadass ,  Ashish Kumar

IPC: H02M1/44 ,  H02M1/12 ,  H02M1/15

CPC classification number: H02M1/44 ,  H02M1/123 ,  H02M1/15

Abstract: Described embodiments include a circuit for filtering electromagnetic interference (EMI) that includes an electrically conductive housing enclosing the circuit, a first power terminal providing a first signal, and a second power terminal providing a second signal, the first and second signals forming a differential power input. A filter circuit provides a common mode noise cancelling signal at an output responsive to first and second inputs. An inductive choke has first and second coils that are magnetically coupled. The first coil is coupled between the first power terminal and a first converter input. The second coil is coupled between the second power terminal and a second converter input. A third capacitor is coupled between the filter output and the second power terminal. A fourth capacitor is coupled between the first power terminal and the second power terminal, and an inductor is coupled between the housing and a ground terminal.

公开(公告)号：US10826403B1

公开(公告)日：2020-11-03

申请号：US16566240

申请日：2019-09-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yogesh Kumar Ramadass ,  Ashish Kumar

IPC: H02M3/335 ,  H02M1/088 ,  H02M1/00

Abstract: A system includes an input voltage supply and a switching converter coupled to the input voltage supply. The switching converter includes a transformer having a primary coil and a secondary coil. The switching converter also includes a Y-rated capacitor with a top plate and a bottom plate, wherein the top plate is coupled to a first end of the secondary coil. The switching converter also includes a push-pull current source coupled to the bottom plate of the Y-rated capacitor. The switching converter also includes a controller coupled to the push-pull current source.