公开(公告)号：US10534384B2

公开(公告)日：2020-01-14

申请号：US15585399

申请日：2017-05-03

申请人： Linear Technology Corporation

发明人： Gregory Manlove ,  James McKenzie ,  Robert Chiacchia ,  Yi Ding Gu ,  Jian Li

IPC分类号： H02M3/156 ,  G05F1/10 ,  G05F1/56 ,  H02M1/32 ,  H02M3/142 ,  H02M3/158 ,  H02M1/00

摘要： A current mode switching regulator circuit and operating method includes a variable duty cycle power switch controller, a voltage feedback loop that provides a feedback signal based on the output voltage, a current feedback loop that provides a current sense signal based on the output current, and an offset circuit having an external signal input and coupled to the current feedback loop. The power switch controller controls the switching regulator circuit to generate an output voltage and an output current. The offset circuit is configured to provide an offset output control signal, independently of the voltage feedback loop, to control the power switch controller so as to vary a duty cycle of the power switch controller based on the current sense signal and an external offset signal applied to the external signal input.

公开(公告)号：US10013003B2

公开(公告)日：2018-07-03

申请号：US13764045

申请日：2013-02-11

申请人： Linear Technology Corporation

发明人： Gregory Manlove ,  Yi Ding Gu ,  Jian Li

IPC分类号： H02M3/156 ,  G05F1/10

CPC分类号： G05F1/10 ,  G05F1/562 ,  H02M1/32 ,  H02M3/142 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0019 ,  H02M2001/0025

摘要： A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.

公开(公告)号：US20140139198A1

公开(公告)日：2014-05-22

申请号：US13764045

申请日：2013-02-11

申请人： LINEAR TECHNOLOGY CORPORATION

发明人： Gregory Manlove ,  Yi Ding Gu ,  Jian Li

IPC分类号： G05F1/10

CPC分类号： G05F1/10 ,  G05F1/562 ,  H02M1/32 ,  H02M3/142 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0019 ,  H02M2001/0025

摘要： A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.

摘要翻译： 开关稳压器电路包括连接在调节器电路的控制回路中的偏移电路，响应于指示迫在眉睫的负载电流步长的信号，调节调节器电路之前的当前步骤的功率开关的占空比 响应于由于当前步骤而导致的输出电压的变化。 在一个实施例中，负载控制器在负载电流步长之前不久就发出数字信号。 数字信号被解码并转换成调节器的反馈控制环路中的模拟偏移信号，以立即调节开关的占空比，而与输出电压电平无关。 通过适当的偏移定时，输出电压纹波大大降低。 电流偏移也可以用于响应于请求电压阶跃的外部信号快速地改变输出电压。