公开(公告)号：US08912780B2

公开(公告)日：2014-12-16

申请号：US13028669

申请日：2011-02-16

申请人： Shuhei Kawai ,  Iwao Fukushi ,  Masahiro Maruki

发明人： Shuhei Kawai ,  Iwao Fukushi ,  Masahiro Maruki

IPC分类号： H02M3/156

CPC分类号： H02M3/156

摘要： A switching-control circuit to control switching of a transistor whose input electrode is applied with an input voltage, and turn off the transistor, when an output current from the transistor is greater than a reference current, includes: a reference-voltage-generating circuit to generate such a first-reference voltage that the reference current is reduced with reduction in an output voltage; a comparing circuit to compare a voltage corresponding to the output current with the first-reference voltage; and a driving circuit to turn on/off the transistor based on a feedback voltage corresponding to the output voltage and a second reference voltage corresponding to a target level so that the output voltage reaches the target level, when the comparing circuit determines that the output current is smaller than the reference current, and turn off the transistor when the comparing circuit determines that the output current is greater than the reference current.

摘要翻译： 一种开关控制电路，用于控制输入电极施加输入电压的晶体管的开关，并且当来自晶体管的输出电流大于参考电流时，截止晶体管的开关控制电路包括：基准电压产生电路 以产生这样的第一参考电压，使得参考电流随着输出电压的降低而减小; 比较电路，用于将对应于输出电流的电压与第一参考电压进行比较; 以及驱动电路，用于基于对应于输出电压的反馈电压和对应于目标电平的第二参考电压来接通/关断晶体管，使得当比较电路确定输出电流时，输出电压达到目标电平 小于参考电流，并且当比较电路确定输出电流大于参考电流时，关断晶体管。

公开(公告)号：US08415932B2

公开(公告)日：2013-04-09

申请号：US12639769

申请日：2009-12-16

申请人： Yosuke Kobayashi ,  Iwao Fukushi

发明人： Yosuke Kobayashi ,  Iwao Fukushi

IPC分类号： G05F1/40

CPC分类号： H02M3/156 ,  H02M1/08

摘要： A switching control circuit includes an N-channel MOSFET having an input electrode applied with an input voltage and an output electrode connected to one end of an inductor and one end of a rectifying element. The other end of the inductor is connected to a first capacitor. A bootstrap circuit is configured to generate a bootstrap voltage on a second capacitor having one end connected to the output electrode of the N-channel MOSFET. The bootstrap voltage is required when the N-channel MOSFET is turned on. A driving circuit is configured to be applied with a driving voltage corresponding to the bootstrap voltage and turn on/off the N-channel MOSFET to generate an output voltage of a target level on the first capacitor. A clamping circuit is configured to clamp the driving voltage to be at a predetermined level or lower.

摘要翻译： 开关控制电路包括具有施加有输入电压的输入电极的N沟道MOSFET和连接到电感器的一端和整流元件的一端的输出电极。 电感器的另一端连接到第一电容器。 引导电路被配置为在具有连接到N沟道MOSFET的输出电极的一端的第二电容器上产生自举电压。 当N沟道MOSFET导通时，需要自举电压。 驱动电路被配置为施加与自举电压相对应的驱动电压并且打开/关闭N沟道MOSFET以在第一电容器上产生目标电平的输出电压。 钳位电路被配置为将驱动电压钳位在预定电平以下。

公开(公告)号：US07940507B2

公开(公告)日：2011-05-10

申请号：US12749351

申请日：2010-03-29

申请人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

发明人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

IPC分类号： H02H3/00

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

摘要： The switching control circuit comprises a switching control signal generation circuit that detects a change in ripples of the output voltage and-generates a switching control signal for the on/off control of the switching element to make the output voltage follow the target level; an overcurrent state detection circuit that generates a state signal indicating whether the output current is in an overcurrent state where the output current is equal to or greater than a predetermined current; and a delay circuit that delays the state signal for a same predetermined delay time at both of the times when the output current exceeds the predetermined current and when the output current falls below the predetermined current.

摘要翻译： 开关控制电路包括开关控制信号生成电路，其检测输出电压的波动的变化，并生成用于开关元件的开/关控制的开关控制信号，使输出电压达到目标电平; 产生指示输出电流是否处于输出电流等于或大于预定电流的过电流状态的状态信号的过电流状态检测电路; 以及延迟电路，其在输出电流超过预定电流的两个时间和当输出电流低于预定电流时，延迟状态信号相同的预定延迟时间。

公开(公告)号：US20060290333A1

公开(公告)日：2006-12-28

申请号：US11426273

申请日：2006-06-23

申请人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

发明人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

IPC分类号： G05F1/573

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

摘要： A self-excited DC-DC converter comprises a switching element that chops a direct-current input voltage; a smoothing circuit that smoothes the chopped voltage to generate a DC output voltage; a switching control signal generation circuit that generates a switching control signal for the on/off control of the switching element by comparing a feedback voltage of the output voltage and a comparison voltage; an output correction circuit that adjusts the comparison voltage according to an error between the feedback voltage and the reference voltage and, when the output current is in the overcurrent state, reduces the level of the comparison voltage; an overcurrent protection signal generation circuit that, when the output current is in an overcurrent state, generates an overcurrent protection signal for turning off the switching element regardless of the switching control signal; and a delay circuit that delays the overcurrent protection signal. Also, a switching control circuit is provided therein.

摘要翻译： 自激式DC-DC转换器包括切断直流输入电压的开关元件; 平滑电路，其使所述斩波电压平滑以产生DC输出电压; 切换控制信号生成电路，通过比较输出电压的反馈电压和比较电压，生成用于开关元件的导通/截止控制的开关控制信号; 输出校正电路，根据反馈电压和参考电压之间的误差调整比较电压，并且当输出电流处于过电流状态时，降低比较电压的电平; 过电流保护信号产生电路，当输出电流处于过电流状态时，不管开关控制信号如何，都产生用于关断开关元件的过电流保护信号; 以及延迟过电流保护信号的延迟电路。 另外，在其中设置开关控制电路。

公开(公告)号：US08179107B2

公开(公告)日：2012-05-15

申请号：US12354559

申请日：2009-01-15

申请人： Iwao Fukushi

发明人： Iwao Fukushi

IPC分类号： G05F1/40

CPC分类号： H02M1/32 ,  H02M3/156

摘要： A power supply circuit comprising: a voltage generating circuit configured to generate an output voltage of a target level from an input voltage; an overcurrent protection circuit configured to control the voltage generating circuit so as to stop an output current, when a level of the output current generated at a time of generating the output voltage is greater than a reference level; and a reference-level change circuit configured to change the reference level in the overcurrent protection circuit to be at a second level higher than a first level from the first level for a predetermined period, when the overcurrent protection circuit detects that the level of the output current is greater than the reference level.

摘要翻译： 一种电源电路，包括：电压产生电路，被配置为从输入电压产生目标电平的输出电压; 当产生输出电压时产生的输出电流的电平大于基准电平时，配置成控制电压发生电路以停止输出电流的过电流保护电路; 以及参考电平改变电路，其被配置为在过电流保护电路检测到所述输出的电平时，将所述过电流保护电路中的基准电平从所述第一电平变为比所述第一电平高一级的第二电平 电流大于参考电平。

公开(公告)号：US20110199145A1

公开(公告)日：2011-08-18

申请号：US13028669

申请日：2011-02-16

申请人： Shuhei Kawai ,  Iwao Fukushi ,  Masahiro Maruki

发明人： Shuhei Kawai ,  Iwao Fukushi ,  Masahiro Maruki

IPC分类号： H03K17/56

CPC分类号： H02M3/156

摘要： A switching-control circuit to control switching of a transistor whose input electrode is applied with an input voltage, and turn off the transistor, when an output current from the transistor is greater than a reference current, includes: a reference-voltage-generating circuit to generate such a first-reference voltage that the reference current is reduced with reduction in an output voltage; a comparing circuit to compare a voltage corresponding to the output current with the first-reference voltage; and a driving circuit to turn on/off the transistor based on a feedback voltage corresponding to the output voltage and a second reference voltage corresponding to a target level so that the output voltage reaches the target level, when the comparing circuit determines that the output current is smaller than the reference current, and turn off the transistor when the comparing circuit determines that the output current is greater than the reference current.

摘要翻译： 一种开关控制电路，用于控制输入电极施加输入电压的晶体管的开关，并且当来自晶体管的输出电流大于参考电流时，截止晶体管的开关控制电路包括：基准电压产生电路 以产生这样的第一参考电压，使得参考电流随着输出电压的降低而减小; 比较电路，用于将对应于输出电流的电压与第一参考电压进行比较; 以及驱动电路，用于基于对应于输出电压的反馈电压和对应于目标电平的第二参考电压来接通/关断晶体管，使得当比较电路确定输出电流时，输出电压达到目标电平 小于参考电流，并且当比较电路确定输出电流大于参考电流时，关断晶体管。

公开(公告)号：US20100181984A1

公开(公告)日：2010-07-22

申请号：US12749351

申请日：2010-03-29

申请人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

发明人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

IPC分类号： G05F1/10

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

摘要： The switching control circuit comprises a switching control signal generation circuit that detects a change in ripples of the output voltage and-generates a switching control signal for the on/off control of the switching element to make the output voltage follow the target level; an overcurrent state detection circuit that generates a state signal indicating whether the output current is in an overcurrent state where the output current is equal to or greater than a predetermined current; and a delay circuit that delays the state signal for a same predetermined delay time at both of the times when the output current exceeds the predetermined current and when the output current falls below the predetermined current.

摘要翻译： 开关控制电路包括开关控制信号生成电路，其检测输出电压的波动的变化，并生成用于开关元件的开/关控制的开关控制信号，使输出电压达到目标电平; 产生指示输出电流是否处于输出电流等于或大于预定电流的过电流状态的状态信号的过电流状态检测电路; 以及延迟电路，其在输出电流超过预定电流的两个时间和当输出电流低于预定电流时，延迟状态信号相同的预定延迟时间。

公开(公告)号：US07755874B2

公开(公告)日：2010-07-13

申请号：US12016124

申请日：2008-01-17

申请人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

发明人： Iwao Fukushi ,  Tomoaki Nishi ,  Takashi Noma

IPC分类号： H02H3/00

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

摘要： A self-excited DC-DC converter includes a switching element that chops an input voltage; a smoothing circuit that smoothes the chopped voltage to generate an output voltage; and a switching control circuit. The switching control circuit includes a switching control signal generation circuit that generates a switching control signal for the on/off control of the switching element by comparing a feedback voltage of the output voltage and a comparison voltage; an output correction circuit that adjusts the comparison voltage according to an error between the feedback voltage and the reference voltage and, when the output current is in the overcurrent state, reduces the level of the comparison voltage; an overcurrent protection signal generation circuit that, when the output current is in an overcurrent state, generates an overcurrent protection signal for turning off the switching element regardless of the switching control signal; and a delay circuit that delays the overcurrent protection signal.

摘要翻译： 自激式DC-DC转换器包括切换输入电压的开关元件; 平滑电路，其使所述斩波电压平滑以产生输出电压; 和开关控制电路。 开关控制电路包括切换控制信号生成电路，其通过比较输出电压的反馈电压和比较电压来生成用于开关元件的导通/截止控制的开关控制信号; 输出校正电路，根据反馈电压和参考电压之间的误差调整比较电压，并且当输出电流处于过电流状态时，降低比较电压的电平; 过电流保护信号产生电路，当输出电流处于过电流状态时，不管开关控制信号如何，都产生用于关断开关元件的过电流保护信号; 以及延迟过电流保护信号的延迟电路。

公开(公告)号：US20100156372A1

公开(公告)日：2010-06-24

申请号：US12639769

申请日：2009-12-16

申请人： Yosuke Kobayashi ,  Iwao Fukushi

发明人： Yosuke Kobayashi ,  Iwao Fukushi

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M1/08

摘要： A switching control circuit includes an N-channel MOSFET having an input electrode applied with an input voltage and an output electrode connected to one end of an inductor and one end of a rectifying element. The other end of the inductor is connected to a first capacitor. A bootstrap circuit is configured to generate a bootstrap voltage on a second capacitor having one end connected to the output electrode of the N-channel MOSFET. The bootstrap voltage is required when the N-channel MOSFET is turned on. A driving circuit is configured to be applied with a driving voltage corresponding to the bootstrap voltage and turn on/off the N-channel MOSFET to generate an output voltage of a target level on the first capacitor. A clamping circuit is configured to clamp the driving voltage to be at a predetermined level or lower.

摘要翻译： 开关控制电路包括具有施加有输入电压的输入电极的N沟道MOSFET和连接到电感器的一端和整流元件的一端的输出电极。 电感器的另一端连接到第一电容器。 引导电路被配置为在具有连接到N沟道MOSFET的输出电极的一端的第二电容器上产生自举电压。 当N沟道MOSFET导通时，需要自举电压。 驱动电路被配置为施加与自举电压相对应的驱动电压并且打开/关闭N沟道MOSFET以在第一电容器上产生目标电平的输出电压。 钳位电路被配置为将驱动电压钳位在预定电平以下。

公开(公告)号：US07782024B2

公开(公告)日：2010-08-24

申请号：US12064622

申请日：2007-04-04

申请人： Iwao Fukushi ,  Masahiro Maruki ,  Takashi Noma

发明人： Iwao Fukushi ,  Masahiro Maruki ,  Takashi Noma

IPC分类号： G05F1/613

CPC分类号： H02M3/1588 ,  H02M1/088 ,  H02M2001/0025 ,  Y02B70/1466 ,  Y10S323/901

摘要： A switching control circuit comprises: an error amplifying circuit configured to output an error voltage obtained by amplifying an error between a feedback voltage corresponding to an output voltage and a lower voltage selected out of a first reference voltage increasing with time passage and a second reference voltage used as a reference for a target level; a comparison circuit configured to output a comparison signal obtained by comparing the feedback voltage with the error voltage output from the error amplifying circuit; and a drive circuit configured to output first and second control signals for controlling first and second transistors, respectively, in order to turn the output voltage to the target level by complementarily turning on and off the first and second transistors, after the error voltage exceeds the feedback voltage, based on the comparison signal output from the comparison circuit.

摘要翻译： 一种开关控制电路，包括：误差放大电路，被配置为输出通过放大对应于输出电压的反馈电压与从时间通过而增加的第一参考电压中选择的较低电压之间的误差而获得的误差电压，以及第二参考电压 用作目标水平的参考; 比较电路，被配置为输出通过将反馈电压与从误差放大电路输出的误差电压进行比较而获得的比较信号; 以及驱动电路，被配置为输出用于分别控制第一和第二晶体管的第一和第二控制信号，以便在误差电压超过第一和第二晶体管之后通过互补地导通和关断第一和第二晶体管将输出电压转换到目标电平 反馈电压，基于比较电路输出的比较信号。