公开(公告)号：US20210044294A1

公开(公告)日：2021-02-11

申请号：US17082937

申请日：2020-10-28

Applicant: Texas Instruments Incorporated

Inventor： Mayank Garg ,  Shu-Ing Ju ,  Arun Rao ,  Wei Zhang

IPC: H03K17/687 ,  H03K17/693

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a multi-level turn-off circuit. An example power delivery circuit includes a two-level turn-off circuit to be coupled to a first switch to reduce a first gate voltage of the first switch from a first voltage to a second voltage when a current flowing through the first switch is greater than an over-current threshold, the two-level turn-off circuit including a second switch, a voltage-current-voltage buffer to reduce a second gate voltage of the second switch from a third voltage to a fourth voltage, and a comparator circuit to turn off the second switch when the second gate voltage is the fourth voltage, and a driver to be coupled to the first switch to turn off the first switch when the second gate voltage is the fourth voltage.

公开(公告)号：US20150015220A1

公开(公告)日：2015-01-15

申请号：US14253520

申请日：2014-04-15

Applicant: Texas Instruments Incorporated

Inventor： Shu-Ing Ju

IPC: H02M3/158

CPC classification number: H02M3/158 ,  H02M3/156 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/16

Abstract: Mode control circuitry is disclosed for use in a buck switching voltage regulator capable of operating in a pulse width modulation (PWM) mode and a pulse frequency modulation (PFM) mode, with the regulator including an inductor having first and second opposite inductor terminals, a first transistor switch connected between the first inductor terminal and a power input terminal and a second transistor switch connected between the first inductor terminal and a circuit common. Current sensing circuitry is provided to sense inductor current through the second switching transistor when the second switching transistor is switched to an ON state and to produce a current sense signal which is integrated over time starting when the second switching transistor is switched to an ON state and to produce a sense signal. The mode switching circuitry switches between the PWM and PFM modes in response to the sense signal.

Abstract translation: 模式控制电路被公开用于能够以脉冲宽度调制（PWM）模式和脉冲频率调制（PFM）模式工作的降压开关稳压器，其中调节器包括具有第一和第二相反电感器端子的电感器， 第一晶体管开关连接在第一电感器端子和电源输入端子之间，第二晶体管开关连接在第一电感器端子和电路公共端之间。 当第二开关晶体管切换到导通状态时，提供电流检测电路来感测通过第二开关晶体管的电感电流，并且产生电流检测信号，该电流检测信号在第二开关晶体管切换到导通状态时随时间积分， 以产生感测信号。 模式切换电路响应于感测信号在PWM和PFM模式之间切换。

公开(公告)号：US11528026B2

公开(公告)日：2022-12-13

申请号：US17082937

申请日：2020-10-28

Applicant: Texas Instruments Incorporated

Inventor： Mayank Garg ,  Shu-Ing Ju ,  Arun Rao ,  Wei Zhang

IPC: H03K17/687 ,  H03K17/693

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a multi-level turn-off circuit. An example power delivery circuit includes a two-level turn-off circuit to be coupled to a first switch to reduce a first gate voltage of the first switch from a first voltage to a second voltage when a current flowing through the first switch is greater than an over-current threshold, the two-level turn-off circuit including a second switch, a voltage-current-voltage buffer to reduce a second gate voltage of the second switch from a third voltage to a fourth voltage, and a comparator circuit to turn off the second switch when the second gate voltage is the fourth voltage, and a driver to be coupled to the first switch to turn off the first switch when the second gate voltage is the fourth voltage.

公开(公告)号：US10855275B2

公开(公告)日：2020-12-01

申请号：US16399611

申请日：2019-04-30

Applicant: Texas Instruments Incorporated

Inventor： Mayank Garg ,  Shu-Ing Ju ,  Arun Rao ,  Wei Zhang

IPC: H03K17/687 ,  H03K17/693

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a multi-level turn-off circuit. An example power delivery circuit includes a two-level turn-off circuit to be coupled to a first switch to reduce a first gate voltage of the first switch from a first voltage to a second voltage when a current flowing through the first switch is greater than an over-current threshold, the two-level turn-off circuit including a second switch, a voltage-current-voltage buffer to reduce a second gate voltage of the second switch from a third voltage to a fourth voltage, and a comparator circuit to turn off the second switch when the second gate voltage is the fourth voltage, and a driver to be coupled to the first switch to turn off the first switch when the second gate voltage is the fourth voltage.

公开(公告)号：US20200076425A1

公开(公告)日：2020-03-05

申请号：US16399611

申请日：2019-04-30

Applicant: Texas Instruments Incorporated

Inventor： Mayank Garg ,  Shu-Ing Ju ,  Arun Rao

IPC: H03K17/687 ,  H03K17/693

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a multi-level turn-off circuit. An example power delivery circuit includes a two-level turn-off circuit to be coupled to a first switch to reduce a first gate voltage of the first switch from a first voltage to a second voltage when a current flowing through the first switch is greater than an over-current threshold, the two-level turn-off circuit including a second switch, a voltage-current-voltage buffer to reduce a second gate voltage of the second switch from a third voltage to a fourth voltage, and a comparator circuit to turn off the second switch when the second gate voltage is the fourth voltage, and a driver to be coupled to the first switch to turn off the first switch when the second gate voltage is the fourth voltage.

公开(公告)号：US09467049B2

公开(公告)日：2016-10-11

申请号：US14253520

申请日：2014-04-15

Applicant: Texas Instruments Incorporated

Inventor： Shu-Ing Ju

IPC: H02M3/156 ,  H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M3/156 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A buck switching voltage regulator, with high side and low side switching transistors, includes mode control circuitry for switching between PWM and PFM modes based on sensing inductor current through the low side switch during switching cycle OFF times (inductor discharge). Mode switching is based on comparing a an integrated inductor current sense signal with an integrated reference signal corresponding to a predefined average inductor current IAVE. In one embodiment, a mode switching condition is based in part on [IVALLEY=2IAVE−IPEAK], where IPEAK is a detected peak inductor current at the beginning of an OFF time, and IVALLEY is an inductor current value determined by IAVE and IPEAK.

Abstract translation: 具有高侧和低侧开关晶体管的降压开关稳压器包括用于在开关周期OFF时间（电感放电）期间通过低压开关感测电感器电流在PWM和PFM模式之间切换的模式控制电路。 模式切换基于将集成电感器电流感测信号与对应于预定平均电感器电流IAVE的集成参考信号进行比较。 在一个实施例中，模式切换条件部分地基于[IVALLEY = 2IAVE-IPEAK]，其中IPEAK是在OFF时间开始时检测到的峰值电感器电流，并且IVALLEY是由IAVE和IPEAK确定的电感器电流值。