公开(公告)号：US10608532B1

公开(公告)日：2020-03-31

申请号：US16425353

申请日：2019-05-29

Applicant: Texas Instruments Incorporated

Inventor： Guofeng Jin ,  Yueming Sun

IPC: H02M3/156 ,  H02M1/14 ,  H02M1/08 ,  H02M1/00

Abstract: A converter circuit includes a power stage circuit configured to convert an input voltage to an output voltage provided at an output, and a control circuit configured to control the power stage circuit. The control circuit is configured to operate in one of a pulse frequency modulation (“PFM”) mode and a pulse width modulation (“PWM”) mode depending on a current supplied to the output. The control circuit includes a multi-mode timer circuit configured to provide a switching signal to set an off time for each switching cycle of the power stage circuit during the PFM mode and during the PWM mode.

公开(公告)号：US11081957B2

公开(公告)日：2021-08-03

申请号：US16781680

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Guofeng Jin ,  Yueming Sun

IPC: H02M3/156 ,  H02M1/14 ,  H02M1/08 ,  H02M1/00

Abstract: A converter circuit includes a power stage circuit configured to convert an input voltage to an output voltage provided at an output, and a control circuit configured to control the power stage circuit. The control circuit is configured to operate in one of a pulse frequency modulation (“PFM”) mode and a pulse width modulation (“PWM”) mode depending on a current supplied to the output. The control circuit includes a multi-mode timer circuit configured to provide a switching signal to set an off time for each switching cycle of the power stage circuit during the PFM mode and during the PWM mode.

公开(公告)号：US11509210B1

公开(公告)日：2022-11-22

申请号：US17347177

申请日：2021-06-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yueming Sun ,  Guofeng Jin

IPC: H02M1/08 ,  H02M3/155 ,  H03K3/037 ,  H03K4/48 ,  H03K5/24

Abstract: A device includes a comparator having a first comparator input configured to receive a time signal. The device also includes a subtractor having a subtractor output coupled to a second comparator input, and a first subtractor input adapted to be coupled to a voltage converter terminal. The device also includes a current source having an output coupled to a second subtractor input, and a current source input coupled to the first subtractor input. The device also includes a capacitor coupled to the second subtractor input and to ground. The device also includes a latch having an output and first and second inputs. The latch output is coupled to a control terminal of a transistor in parallel with the capacitor, the first latch input is coupled to the comparator output, and the second latch input is configured to receive a clock signal.

公开(公告)号：US20200228009A1

公开(公告)日：2020-07-16

申请号：US16781680

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Guofeng Jin ,  Yueming Sun

IPC: H02M3/156 ,  H02M1/14 ,  H02M1/08

Abstract: A converter circuit includes a power stage circuit configured to convert an input voltage to an output voltage provided at an output, and a control circuit configured to control the power stage circuit. The control circuit is configured to operate in one of a pulse frequency modulation (“PFM”) mode and a pulse width modulation (“PWM”) mode depending on a current supplied to the output. The control circuit includes a multi-mode timer circuit configured to provide a switching signal to set an off time for each switching cycle of the power stage circuit during the PFM mode and during the PWM mode.