公开(公告)号：US06995483B2

公开(公告)日：2006-02-07

申请号：US10271016

申请日：2002-10-15

Applicant: James A. Kohout ,  David J. Baldwin

Inventor： James A. Kohout ,  David J. Baldwin

IPC: G05F3/06 ,  G05F1/44 ,  H03M1/66 ,  H02M3/335

CPC classification number: H02M3/1588 ,  H02M1/32 ,  H02M2001/0009 ,  Y02B70/1466

Abstract: A synchronous DC-DC regulator, adapted to receive a high side pulsed signal and a low side pulsed signal that is substantially the inverse of the high side pulsed signal. The regulator includes an inductor, and a capacitor having one port connected to ground, and having a second port providing an output voltage of the DC-DC regulator. A driver is provided for driving pulses of current to the inductor when the high side pulsed signal is asserted. An undercurrent sense circuit is adapted to sense a driving current flowing through the driver and to assert a disable signal when the driving current is less than a predetermined amount. An enable/disable circuit is adapted to allow the low side pulsed signal to turn the switch on when the disable signal is not asserted, and to not allow the low side pulsed signals from turning the switch on when the disable signal is asserted.

Abstract translation: 同步DC-DC调节器，适于接收高侧脉冲信号和基本上与高侧脉冲信号相反的低侧脉冲信号。 调节器包括电感器和具有连接到地的一个端口的电容器，并且具有提供DC-DC调节器的输出电压的第二端口。 当提供高侧脉冲信号时，提供驱动器来驱动电流脉冲到电感器。 欠流检测电路适于检测流过驱动器的驱动电流，并且当驱动电流小于预定量时，断言禁用信号。 启用/禁用电路适于允许低侧脉冲信号在禁用信号未被置位时接通，并且当禁用信号被断言时不允许低侧脉冲信号接通开关。

公开(公告)号：US06859020B2

公开(公告)日：2005-02-22

申请号：US10270921

申请日：2002-10-15

Applicant: David J. Baldwin ,  James A. Kohout

Inventor： David J. Baldwin ,  James A. Kohout

IPC: H02M3/156 ,  H02M3/158 ,  G05F1/44

CPC classification number: H02M3/156 ,  H02M3/1588 ,  H02M2001/0032 ,  Y02B70/1466 ,  Y02B70/16

Abstract: A DC/DC converter has a semiconductor switch coupled to an inductor, a capacitor and a rectifier. A comparator is coupled to across the rectifier to detect a polarity reversal during the second portion of converter operation to place the converter in a low power mode if the voltage across the rectifier is of an appropriate polarity for reverse current flow. The rectifier may be a synchronous rectifier transistor and the voltage converter placed in a low power mode when the polarity across the synchronous rectifier indicates that reverse current flow is possible. A timing circuit delays the generation of the control signal to place the converter in a low power mode until the steady state current is below a predetermined threshold for a predetermined amount of time. The synchronous rectifier may be turned OFF when the current through the converter falls below another predetermined threshold value and the voltage across the synchronous rectifier will become the voltage across the parasitic diode of the FET synchronous rectifier.

Abstract translation: DC / DC转换器具有耦合到电感器，电容器和整流器的半导体开关。 比较器耦合到整流器两端以在转换器操作的第二部分期间检测极性反转，以便如果整流器两端的电压对于反向电流流动具有适当极性，则将转换器置于低功率模式。 整流器可以是同步整流器晶体管，并且当跨同步整流器的极性表示反向电流流动是可能的时，电压转换器处于低功率模式。 定时电路延迟控制信号的产生，以将转换器置于低功率模式，直到稳态电流低于预定阈值达预定时间量。 当通过转换器的电流低于另一预定阈值时，同步整流器可能被关断，同步整流器两端的电压将成为FET同步整流器的寄生二极管两端的电压。

公开(公告)号：US06650100B1

公开(公告)日：2003-11-18

申请号：US10233811

申请日：2002-09-03

Applicant: James A. Kohout ,  David J. Baldwin ,  Ross E. Teggatz

Inventor： James A. Kohout ,  David J. Baldwin ,  Ross E. Teggatz

IPC: G05F1563

CPC classification number: H02M3/1582 ,  G05F1/613 ,  H02M2001/0006 ,  H02M2001/009 ,  H03K17/063

Abstract: A multiple mode switching regulator with a bootstrap technique includes an inductor 20; a high side input switch 22 coupled to a first end of the inductor 20; a low side input switch 24 coupled to the first end of the inductor 20; a high side driver 34 coupled to a control node of the high side input switch 22; a low side driver 36 coupled to a control node of the low side input switch 24; a high side output switch 26 coupled to a second end of the inductor 20; a low side output switch 28 coupled to the second end of the inductor 20; a first bootstrap capacitor 30 coupled between the first end of the inductor 20 and a voltage supply node of the high side driver 34; a second bootstrap capacitor 32 coupled between the second end of the inductor 20 and a voltage supply node of the low side driver 36; and a first diode 40 coupled between the voltage supply node of the high side driver 34 and the voltage supply node of the low side driver 36. The two bootstrap capacitors 30 and 32 are employed on both sides of inductor 20 to provide gate voltage to high side input switch 22 through high side driver 34 in any mode of operation. This allows the regulator to work in three modes of operation without different external components or configurations depending on the mode.

Abstract translation: 具有自举技术的多模开关调节器包括电感器20; 耦合到电感器20的第一端的高侧输入开关22; 耦合到电感器20的第一端的低侧输入开关24; 耦合到高侧输入开关22的控制节点的高侧驱动器34; 耦合到低侧输入开关24的控制节点的低侧驱动器36; 耦合到电感器20的第二端的高侧输出开关26; 耦合到电感器20的第二端的低侧输出开关28; 耦合在电感器20的第一端和高侧驱动器34的电压供应节点之间的第一自举电容器30; 耦合在电感器20的第二端和低侧驱动器36的电压供应节点之间的第二自举电容器32; 以及耦合在高侧驱动器34的电压供应节点和低侧驱动器36的电压供应节点之间的第一二极管40.两个自举电容器30和32用于电感器20的两侧以将栅极电压提供到高电平 在任何操作模式下通过高侧驱动器34进行侧面输入开关22。 这允许调节器在三种工作模式下工作，而不需要不同的外部组件或配置，这取决于模式。

公开(公告)号：US07982447B2

公开(公告)日：2011-07-19

申请号：US12335255

申请日：2008-12-15

Applicant: Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

Inventor： Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

IPC: G05F1/40

CPC classification number: H02M3/156

Abstract: A switched mode power supply has a high side switching transistor coupled between a voltage source and a load for generating the output voltage at the load. A driver circuit drives the high side switching transistor. A first resistor divider is coupled to the output voltage and has a first tap. An error amplifier has a first input coupled to the first tap and a compensated feedback loop. A second resistor divider is coupled to the output voltage and has a second tap, resistance of the second resistor divider being less than resistance of the first resistor divider. A switch is coupled to the second tap and to the first input of the error amplifier for connecting the second tap to the first input of the error amplifier when the output voltage of the switched mode power supply reaches a first predetermined voltage.

Abstract translation: 开关模式电源具有耦合在电压源和用于在负载下产生输出电压的负载之间的高侧开关晶体管。 驱动电路驱动高侧开关晶体管。 第一电阻分压器耦合到输出电压并且具有第一抽头。 误差放大器具有耦合到第一抽头的第一输入和经补偿的反馈回路。 第二电阻分压器耦合到输出电压并具有第二抽头，第二电阻分压器的电阻小于第一电阻分压器的电阻。 当开关模式电源的输出电压达到第一预定电压时，开关耦合到第二抽头和误差放大器的第一输入端，用于将第二抽头连接到误差放大器的第一输入端。

公开(公告)号：US20090206810A1

公开(公告)日：2009-08-20

申请号：US12335255

申请日：2008-12-15

Applicant: Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

Inventor： Shanmuganand Chellamuthu ,  James A. Kohout ,  Luthuli E. Dake

IPC: G05F1/10

CPC classification number: H02M3/156

Abstract: A switched mode power supply has a high side switching transistor coupled between a voltage source and a load for generating the output voltage at the load. A driver circuit drives the high side switching transistor. A first resistor divider is coupled to the output voltage and has a first tap. An error amplifier has a first input coupled to the first tap and a compensated feedback loop. A second resistor divider is coupled to the output voltage and has a second tap, resistance of the second resistor divider being less than resistance of the first resistor divider. A switch is coupled to the second tap and to the first input of the error amplifier for connecting the second tap to the first input of the error amplifier when the output voltage of the switched mode power supply reaches a first predetermined voltage.

Abstract translation: 开关模式电源具有耦合在电压源和用于在负载下产生输出电压的负载之间的高侧开关晶体管。 驱动电路驱动高侧开关晶体管。 第一电阻分压器耦合到输出电压并且具有第一抽头。 误差放大器具有耦合到第一抽头的第一输入和经补偿的反馈回路。 第二电阻分压器耦合到输出电压并具有第二抽头，第二电阻分压器的电阻小于第一电阻分压器的电阻。 当开关模式电源的输出电压达到第一预定电压时，开关耦合到第二抽头和误差放大器的第一输入端，用于将第二抽头连接到误差放大器的第一输入端。

公开(公告)号：US06969979B2

公开(公告)日：2005-11-29

申请号：US10797780

申请日：2004-03-09

Applicant: James A. Kohout ,  David J. Baldwin

Inventor： James A. Kohout ,  David J. Baldwin

IPC: G05F1/56 ,  H02M1/12

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

Abstract: A switching regulator having a control circuit that automatically senses when a low power mode should be initiated without the use of expensive external components nor an extensive amount of external components is disclosed herein. The switching regulator includes an input switching device, a driver, an inductor, a first output switching device, a second output switching device and an output node. The control circuit includes a low power switching device connected to the output node and the second end of the inductor. An amplifier connects the low power switching device and the first output switching device. A first current mirror couples to the amplifier to mirror the difference between the output current through the output load and the current supplied at the second end of the inductor. A second current mirror couples to the first current mirror to mirror the current difference through a current source and a capacitor connected in parallel across the current source. A comparator compares the voltage generated by the capacitor with a predetermined voltage source. A first and second AND gate couples to the comparator. The output of the first AND gate provides a entry signal that initiates the low power mode for the switching regulator. The second AND gate couples to receive this entry signal. The output of the first AND gate provides a exit signal that indicates when the switching regulator is not in low power mode. The first AND gate couples to receive this exit signal.

Abstract translation: 本文公开了一种具有控制电路的开关调节器，其自动地感测何时应该启动低功率模式，而不需要使用昂贵的外部组件，也没有大量的外部组件。 开关调节器包括输入开关装置，驱动器，电感器，第一输出开关装置，第二输出开关装置和输出节点。 控制电路包括连接到输出节点和电感器的第二端的低功率开​​关装置。 放大器连接低功率开关装置和第一输出开关装置。 第一电流镜耦合到放大器以反映通过输出负载的输出电流与在电感器的第二端提供的电流之间的差异。 第二电流镜耦合到第一电流镜以通过电流源和在电流源上并联连接的电容器来反射电流差。 比较器将电容器产生的电压与预定的电压源进行比较。 第一个和第二个与门耦合到比较器。 第一与门的输出提供一个入口信号，启动开关稳压器的低功耗模式。 第二个与门耦合以接收该输入信号。 第一与门的输出提供一个输出信号，指示开关调节器何时不处于低功率模式。 第一个与门耦合以接收该退出信号。