公开(公告)号：US09041363B2

公开(公告)日：2015-05-26

申请号：US13856611

申请日：2013-04-04

Applicant: Analog Devices Technology

Inventor： Hirohisa Tanabe

IPC: G05F1/24 ,  H02M3/158

CPC classification number: H02M3/1582

Abstract: A “windowless” H-bridge buck-boost switching converter includes a regulation circuit with an error amplifier which produces a ‘comp’ signal, a comparison circuit which compares ‘comp’ with a ‘ramp’ signal, and logic circuitry which receives the comparison circuit output and a mode control signal indicating whether the converter is to operate in buck mode or boost mode and operates the primary or secondary switching elements to produce the desired output voltage in buck or boost mode, respectively. A ‘ramp’ signal generation circuit operates to shift the ‘ramp’ signal up by a voltage Vslp(p−p)+Vhys when transitioning from buck to boost mode, and to shift ‘ramp’ back down by Vslp(p−p)+Vhys when transitioning from boost to buck mode, thereby enabling the converter to operate in buck mode or boost mode only, with no need for an intermediate buck-boost region.

Abstract translation: “无窗”H桥降压升压开关转换器包括具有产生“comp”信号的误差放大器的调节电路，将“comp”与“斜坡”信号进行比较的比较电路和接收比较的逻辑电路 电路输出和指示转换器是否以降压模式或升压模式操作的模式控制信号，并分别操作一级或二级开关元件以产生降压或升压模式中的期望输出电压。 “斜坡”信号发生电路在从降压转换到升压模式时将“斜坡”信号向上移动一个电压Vslp（p-p）+ Vhys，并将“斜坡”下移Vslp（p-p） + Vhys从升压转换到降压模式，从而使转换器只能在降压模式或升压模式下工作，无需中间降压 - 升压区域。

公开(公告)号：US09065337B2

公开(公告)日：2015-06-23

申请号：US13775820

申请日：2013-02-25

Applicant: Analog Devices Technology

Inventor： Hirohisa Tanabe ,  Kenji Tomiyoshi

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

CPC classification number: H02M3/1582 ,  H02M3/156 ,  H02M2001/0009

Abstract: An inductor current emulation circuit for use with a switching converter in which regulating the output voltage includes comparing an output which varies with the difference between the output voltage and a reference voltage with a ‘ramp’ signal which emulates the current in the output inductor. A current sensing circuit produces an output which varies with the current in the switching element that is turned on during the ‘off’ time, an emulated current generator circuit produces the ‘ramp’ signal during both ‘off’ and ‘on’ times, a comparator circuit compares the ‘ramp’ signal with at least one threshold voltage which varies with the sensed current and toggles an output when the ‘ramp’ exceeds the thresholds, and a feedback circuit produces an output which adjusts the ‘ramp’ signal each time the comparator circuit output toggles until the ‘ramp’ signal no longer exceeds the threshold voltages.

Abstract translation: 一种与开关转换器一起使用的电感器电流仿真电路，其中调节输出电压包括将输出与输出电压和参考电压之间的差值进行比较，其中的“斜坡”信号模拟输出电感器中的电流。 电流感测电路产生随着在“关断”时间期间导通的开关元件中的电流而变化的输出，仿真电流发生器电路在“断开”和“打开”时间期间产生“斜坡”信号，a 比较器电路将“斜坡”信号与至少一个随感测电流变化的阈值电压进行比较，并在“斜坡”超过阈值时切换输出，反馈电路产生一个输出，每次输出调整“斜坡”信号 比较器电路输出切换直到“斜坡”信号不再超过阈值电压。

公开(公告)号：US20140239925A1

公开(公告)日：2014-08-28

申请号：US13775820

申请日：2013-02-25

Applicant: Analog Devices Technology

Inventor： Hirohisa Tanabe ,  Kenji Tomiyoshi

IPC: H02M3/158

CPC classification number: H02M3/1582 ,  H02M3/156 ,  H02M2001/0009

Abstract: An inductor current emulation circuit for use with a switching converter in which regulating the output voltage includes comparing an output which varies with the difference between the output voltage and a reference voltage with a ‘ramp’ signal which emulates the current in the output inductor. A current sensing circuit produces an output which varies with the current in the switching element that is turned on during the ‘off’ time, an emulated current generator circuit produces the ‘ramp’ signal during both ‘off’ and ‘on’ times, a comparator circuit compares the ‘ramp’ signal with at least one threshold voltage which varies with the sensed current and toggles an output when the ‘ramp’ exceeds the thresholds, and a feedback circuit produces an output which adjusts the ‘ramp’ signal each time the comparator circuit output toggles until the ‘ramp’ signal no longer exceeds the threshold voltages.

Abstract translation: 一种与开关转换器一起使用的电感器电流仿真电路，其中调节输出电压包括将输出与输出电压和参考电压之间的差值进行比较，其中的“斜坡”信号模拟输出电感器中的电流。 电流感测电路产生随着在“关断”时间期间导通的开关元件中的电流而变化的输出，仿真电流发生器电路在“断开”和“打开”时间期间产生“斜坡”信号，a 比较器电路将“斜坡”信号与至少一个随感测电流变化的阈值电压进行比较，并在“斜坡”超过阈值时切换输出，反馈电路产生一个输出，每次输出调整“斜坡”信号 比较器电路输出切换直到“斜坡”信号不再超过阈值电压。