公开(公告)号：US20060012355A1

公开(公告)日：2006-01-19

申请号：US11132899

申请日：2005-05-19

申请人： Franz Prexl ,  Kevin Scoones ,  Stefan Reithmaier

发明人： Franz Prexl ,  Kevin Scoones ,  Stefan Reithmaier

IPC分类号： G05F1/56

CPC分类号： H02M3/1588 ,  H02M1/32 ,  H02M1/36 ,  Y02B70/1466

摘要： A control circuit for a polarity inverting buck-boost DC-DC converter, includes an operational trans-conductance amplifier that has inputs to which a sensed voltage difference signal is applied and an output connected to an input of a voltage-to-duty-cycle converter. A compensation capacitance is connected between the output of the amplifier and a fixed supply terminal. The compensation capacitance includes a first capacitor that is permanently connected between the output of the amplifier and the fixed supply terminal and a second capacitor that has a switched connection between the output of the amplifier and the fixed supply terminal. The first capacitor has a small capacitance compared to the second capacitor. The switched connection of the second capacitor is controlled by a continuous-discontinuous mode detection circuit.

公开(公告)号：US07595616B2

公开(公告)日：2009-09-29

申请号：US11132899

申请日：2005-05-19

申请人： Franz Prexl ,  Kevin Scoones ,  Stefan Reithmaier

发明人： Franz Prexl ,  Kevin Scoones ,  Stefan Reithmaier

IPC分类号： G05F1/00

CPC分类号： H02M3/1588 ,  H02M1/32 ,  H02M1/36 ,  Y02B70/1466

摘要： A control circuit for a polarity inverting buck-boost DC-DC converter, includes an operational trans-conductance amplifier that has inputs to which a sensed voltage difference signal is applied and an output connected to an input of a voltage-to-duty-cycle converter. A compensation capacitance is connected between the output of the amplifier and a fixed supply terminal. The compensation capacitance includes a first capacitor that is permanently connected between the output of the amplifier and the fixed supply terminal and a second capacitor that has a switched connection between the output of the amplifier and the fixed supply terminal. The first capacitor has a small capacitance compared to the second capacitor. The switched connection of the second capacitor is controlled by a continuous-discontinuous mode detection circuit.

摘要翻译： 用于极性反转降压 - 升压DC-DC转换器的控制电路包括具有输入的操作跨导放大器，感测的电压差信号被施加到输入端，并且输出端连接到电压 - 占空比的输入 转换器。 补偿电容连接在放大器的输出端和固定电源端子之间。 补偿电容包括永久连接在放大器的输出端和固定电源端子之间的第一电容器和在放大器的输出端与固定电源端子之间具有开关连接的第二电容器。 与第二电容器相比，第一电容器具有小的电容。 第二电容器的开关连接由连续不连续模式检测电路控制。

公开(公告)号：US07276888B2

公开(公告)日：2007-10-02

申请号：US11053318

申请日：2005-02-07

申请人： Gerhard Thiele ,  Kevin Scoones ,  Thomas Keller ,  Franz Prexl

发明人： Gerhard Thiele ,  Kevin Scoones ,  Thomas Keller ,  Franz Prexl

IPC分类号： G05F1/00

CPC分类号： H02M1/36 ,  H03K17/0822 ,  H03K2017/0806

摘要： An integrated circuit including a precharge circuit for a DC/DC boost converter which includes a reference current circuit with a MOSFET transistor (MP4) that has a gate connected with the gate of the DC/DC boost converter's power MOSFET transistor (MP5) to form a current mirror. The precharge circuit works to approach the output voltage to the supply voltage prior to the converter startup. An included regulation circuit adjusts the gate potential at the power MOSFET transistor (MP5) and at the MOSFET transistor (MP4) in the reference circuit in response to a reduction of the drain-source voltage of the power MOSFET transistor (MP5) due to precharging load capacitance, in a sense to keep the precharge current through the power MOSFET transistor (MP5) constant.

摘要翻译： 一种包括用于DC / DC升压转换器的预充电电路的集成电路，其包括具有与DC / DC升压转换器的功率MOSFET晶体管（MP 5）的栅极连接的栅极的MOSFET晶体管（MP4）的参考电流电路， 形成电流镜。 在转换器启动之前，预充电电路用于接近输出电压至电源电压。 包括的调节电路响应于功率MOSFET晶体管（MP 5）的漏极 - 源极电压的降低来调整参考电路中的功率MOSFET晶体管（MP 5）和MOSFET晶体管（MP 4）处的栅极电位， 由于预充电负载电容，在某种意义上保持通过功率MOSFET晶体管（MP 5）的预充电电流恒定。

公开(公告)号：US20050180236A1

公开(公告)日：2005-08-18

申请号：US11053318

申请日：2005-02-07

申请人： Gerhard Thiele ,  Kevin Scoones ,  Thomas Keller ,  Franz Prexl

发明人： Gerhard Thiele ,  Kevin Scoones ,  Thomas Keller ,  Franz Prexl

IPC分类号： G05F3/28 ,  G11C7/00 ,  H02M1/36 ,  H02M3/156 ,  H03K17/08 ,  H03K17/082

CPC分类号： H02M1/36 ,  H03K17/0822 ,  H03K2017/0806

摘要： An integrated circuit including a precharge circuit for a DC/DC boost converter is disclosed with an inductor (L1), a power MOSFET transistor (MP5) connected in series with the inductor between a supply terminal and a load (Rload, Cload) that has a second end connected to ground. This precharge circuit further includes a reference current circuit with a MOSFET transistor (MP4) that has a gate connected with the gate of the power MOSFET transistor (MP5) to form a current mirror. The precharge circuit works to approach the output voltage to the supply voltage prior to the converter startup. An included regulation circuit adjusts the gate potential at the power MOSFET transistor (MP5) and at the MOSFET transistor (MP4) in the reference circuit in response to a reduction of the drain-source voltage of the power MOSFET transistor (MP5), in a sense to keep the precharge current through the power MOSFET transistor (MP5) constant.

摘要翻译： 公开了一种包括用于DC / DC升压转换器的预充电电路的集成电路，电感器（L 1），在电源端子和负载（Rload，Cload）之间与电感器串联连接的功率MOSFET晶体管（MP 5） 其具有连接到地面的第二端。 该预充电电路还包括具有MOSFET晶体管（MP4）的参考电流电路，其具有与功率MOSFET晶体管（MP 5）的栅极连接的栅极，以形成电流镜。 在转换器启动之前，预充电电路用于接近输出电压至电源电压。 包括的调节电路响应于功率MOSFET晶体管（MP 5）的漏极 - 源极电压的降低来调整参考电路中的功率MOSFET晶体管（MP 5）和MOSFET晶体管（MP 4）处的栅极电位， 在某种意义上，通过功率MOSFET晶体管（MP 5）保持预充电电流恒定。

公开(公告)号：US06215286B1

公开(公告)日：2001-04-10

申请号：US09444911

申请日：1999-11-22

申请人： Kevin Scoones ,  Franz Prexl ,  Frank R. Fattori

发明人： Kevin Scoones ,  Franz Prexl ,  Frank R. Fattori

IPC分类号： G05F1613

CPC分类号： H02M3/156 ,  H02M3/1582

摘要： The invention relates to switching regulators with at least one inductance and four controllable switches which can be controlled by a control circuit in such a way that the switching regulators may be operated separately in a step-up mode as well as in a step-down mode, whereby in each clock cycle of either of the modes only two switches each are actuated, which in comparison with previous similar switching regulators, where in each clock cycle four switching operations take place, results in current saving effects because of reduced switching losses and lower currents. These are achieved by an element which constantly monitors the duty cycle of one of the switches and, when in the step-down mode the duty cycle approaches 100%, causes a switch-over into the step-up mode, and when in the step-up mode the duty cycle of 0% is approached, causes the switch-over into the step-down mode. Furthermore, the invention relates to methods for operating switching regulators. The switching regulators according to the invention may, for example, find application in mobile telephones.

摘要翻译： 本发明涉及具有至少一个电感的开关调节器和可由控制电路控制的四个可控开关，使得开关稳压器可以以升压模式以及降压模式分开操作 ，由此在任一模式的每个时钟周期中，只有两个开关各自被激励，与之前的类似的开关稳压器相比，在每个时钟周期中发生四次开关操作，由于开关损耗的降低和较低的开关损耗而导致电流节省效应 电流。 这些是通过不断地监视其中一个开关的占空比的元件实现的，并且当在降压模式中占空比接近100％时，导致切换到升压模式，并且在步骤 -up模式，接近0％的占空比，导致切换进入降压模式。 此外，本发明涉及用于操作开关调节器的方法。 根据本发明的开关调节器可以例如在移动电话中找到应用。

公开(公告)号：US08841895B2

公开(公告)日：2014-09-23

申请号：US13488181

申请日：2012-06-04

申请人： Franz Prexl ,  Juergen Neuhaeusler

发明人： Franz Prexl ,  Juergen Neuhaeusler

IPC分类号： G05F1/00

CPC分类号： H02M3/158 ,  H02M3/1582

摘要： An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

摘要翻译： 平均电流模式降压 - 升压DC-DC转换器具有耦合在输入电压源端子和输出端子之间的降压级。 升压级耦合在输入电压源端子和输出端子之间。 电流斜坡控制电路产生用于驱动降压和升压级的斜坡信号，斜坡信号耦合到降压和升压级。 将与期望的输出电压相关的恒定电压直接施加到用于调节输出电压的电压控制反馈回路并直接施加到电流斜坡控制电路的输入，由此输出电压可以从一个电压转移到 另一个通过前馈控制。

公开(公告)号：US20130320949A1

公开(公告)日：2013-12-05

申请号：US13488181

申请日：2012-06-04

申请人： Franz Prexl ,  Juergen Neuhaeusler

发明人： Franz Prexl ,  Juergen Neuhaeusler

IPC分类号： G05F1/46

CPC分类号： H02M3/158 ,  H02M3/1582

摘要： An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

公开(公告)号：US08531168B2

公开(公告)日：2013-09-10

申请号：US12885146

申请日：2010-09-17

申请人： Franz Prexl ,  Juergen Neuhaeusler

发明人： Franz Prexl ,  Juergen Neuhaeusler

IPC分类号： G05F1/569

CPC分类号： H02M3/156 ,  H02M2001/0009 ,  H02M2001/0022

摘要： An electronic device for DC-DC conversion of an input voltage into an output voltage is provided. The electronic device includes a current mode control loop for controlling a sensed current of the DC-DC conversion by comparing a voltage level indicating a magnitude of the sensed current with a reference voltage level indicating the maximum admissible magnitude of the sensed current. The reference voltage level is dynamically adjusted in response to a change of an input voltage level.

摘要翻译： 提供了用于将输入电压DC-DC转换成输出电压的电子设备。 电子设备包括电流模式控制回路，用于通过将指示感测电流的大小的电压电平与指示感测电流的最大容许幅度的参考电压电平进行比较来控制DC-DC转换的感测电流。 响应于输入电压电平的变化来动态地调节参考电压电平。

公开(公告)号：US20090096388A1

公开(公告)日：2009-04-16

申请号：US12247088

申请日：2008-10-07

申请人： Franz Prexl

发明人： Franz Prexl

IPC分类号： H05B41/36

CPC分类号： H05B33/0827

摘要： An electronic device is provided comprising a driver for light emitting semiconductor devices. The driver includes a first MOS transistor (MN1) coupled with a channel to the light emitting semiconductor device at an output node. The first MOS transistor (MN1) is configured to determine a current through the light emitting semiconductor device (LED). A control loop is provided so as to control the first MOS transistor to maintain the magnitude of the current through the light emitting semiconductor device at a target value when a voltage drop across the first MOS transistor (MN1) changes. A second MOS transistor is coupled to the output node and biased so as to supply an auxiliary current to the output node, when the voltage drop across the first MOS transistor drops below a minimum voltage level and a feedback loop is provided to reduce the current through the light emitting semiconductor device by an amount proportional to the auxiliary current.

摘要翻译： 提供一种包括用于发光半导体器件的驱动器的电子器件。 驱动器包括在输出节点处与发光半导体器件的通道耦合的第一MOS晶体管（MN1）。 第一MOS晶体管（MN1）被配置为确定通过发光半导体器件（LED）的电流。 提供控制回路，以便当第一MOS晶体管（MN1）两端的电压降变化时，控制第一MOS晶体管将通过发光半导体器件的电流的大小保持在目标值。 第二MOS晶体管耦合到输出节点并被偏置以便当第一MOS晶体管两端的电压降低到最低电压电平以下时提供辅助电流到输出节点，并且提供反馈回路以减小电流通过 发光半导体器件与辅助电流成比例的量。

公开(公告)号：US06255901B1

公开(公告)日：2001-07-03

申请号：US09464091

申请日：1999-12-15

申请人： Wolfgang Steinhagen ,  Franz Prexl

发明人： Wolfgang Steinhagen ,  Franz Prexl

IPC分类号： H03D110

CPC分类号： H04L27/06

摘要： A demodulator circuit for demodulating a signal ASK-modulated with modulation pulses equal in duration, and having a small depth of modulation and large dynamic range comprises an amplitude limiter (10) through which an amplitude-dependent current flows when the amplitude of the signal to be demodulated exceeds its limiting threshold value. Furthermore comprised is an envelope detector (12) to the input of which the signal to be demodulated is applied, as well as a differentiating network (14) configured so that it differentiates the output signal of the envelope detector (12) and outputs a signal pulse only when the change in amplitude of this output signal is in one direction. A bandpass filter (18) in the demodulator circuit passes, from a signal derived from an amplitude-dependent current from the amplitude limiter (10), the frequency component attributed to the duration of the modulation pulses. A comparator (20) compares the output signal of the bandpass filter (18) to a fixed threshold value and outputs a signal pulse when this output signal exceeds the threshold value. A logic circuit (15) outputs the signal pulse existing in each case as the demodulated signal.

摘要翻译： 用于解调具有等于持续时间并具有较小调制深度和较大动态范围的调制脉冲ASK调制的信号的解调器电路包括幅度限制器（10），当幅度相关电流在信号幅度 被解调超过其限制阈值。 此外，还包括一个包络检测器（12），该信号检测器（12）被施加到要被解调的信号的输入端上，以及一个微分网络（14），其被配置成使得包络检测器（12）的输出信号微分并输出信号 只有当该输出信号的振幅变化在一个方向时才产生脉冲。 解调器电路中的带通滤波器（18）从来自幅度限制器（10）的与幅度相关的电流得到的信号中，使得归因于调制脉冲的持续时间的频率分量。 比较器（20）将带通滤波器（18）的输出信号与固定的阈值进行比较，并在该输出信号超过阈值时输出信号脉冲。 逻辑电路（15）将存在于每种情况下的信号脉冲作为解调信号输出。