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公开(公告)号：US08120345B2
公开(公告)日：2012-02-21
申请号：US12388819
申请日：2009-02-19
IPC分类号： G05F1/00
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A semiconductor device for control applied to a constant-voltage power supply device includes a digital-analog converter circuit which outputs a reference voltage corresponding to a value of a first register with taking an output voltage of a reference voltage source as a criterial reference voltage, and generates a control signal for driving a power semiconductor device based on an output voltage of an error amplifier which differentially amplifies a feedback voltage obtained by resistive-dividing on an output voltage of the constant-voltage power supply device and the reference voltage. An analog-digital converter circuit which converts the feedback voltage to a digital value with taking the output voltage of the constant-voltage power supply device as a reference voltage is provided, and based on the output, a value of a first register is corrected so as to offset an effect of an error in voltage dividing ratio of a voltage dividing resistor circuit.
摘要翻译： 一种应用于恒压电源装置的控制用半导体装置，具备数模转换电路，该数模转换电路以取参考电压源的输出电压作为标准参考电压，输出与第一寄存器的值相对应的基准电压， 并且基于误差放大器的输出电压产生用于驱动功率半导体器件的控制信号，所述误差放大器的差分放大通过对所述恒压电源装置的输出电压进行电阻分压而获得的反馈电压和所述参考电压。 提供了一种模拟数字转换器电路，其将采取恒压电源装置的输出电压的反馈电压转换为数字值作为参考电压，并且基于该输出，第一寄存器的值被校正为 以抵消分压电阻电路的分压比的误差的影响。
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公开(公告)号：US20090243575A1
公开(公告)日：2009-10-01
申请号：US12388819
申请日：2009-02-19
IPC分类号： G05F1/00
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A semiconductor device for control applied to a constant-voltage power supply device includes a digital-analog converter circuit which outputs a reference voltage corresponding to a value of a first register with taking an output voltage of a reference voltage source as a criterial reference voltage, and generates a control signal for driving a power semiconductor device based on an output voltage of an error amplifier which differentially amplifies a feedback voltage obtained by resistive-dividing on an output voltage of the constant-voltage power supply device and the reference voltage. An analog-digital converter circuit which converts the feedback voltage to a digital value with taking the output voltage of the constant-voltage power supply device as a reference voltage is provided, and based on the output, a value of a first register is corrected so as to offset an effect of an error in voltage dividing ratio of a voltage dividing resistor circuit.
摘要翻译： 一种应用于恒压电源装置的控制用半导体装置，具备数模转换电路，该数模转换电路以取参考电压源的输出电压作为标准参考电压，输出与第一寄存器的值相对应的基准电压， 并且基于误差放大器的输出电压产生用于驱动功率半导体器件的控制信号，所述误差放大器的差分放大通过对所述恒压电源装置的输出电压进行电阻分压而获得的反馈电压和所述参考电压。 提供了一种模拟数字转换器电路，其将采取恒压电源装置的输出电压的反馈电压转换为数字值作为参考电压，并且基于该输出，第一寄存器的值被校正为 以抵消分压电阻电路的分压比的误差的影响。
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公开(公告)号：US07385380B2
公开(公告)日：2008-06-10
申请号：US11621664
申请日：2007-01-10
申请人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
发明人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
CPC分类号： H02M3/156 , H02M2001/0009
摘要： In a switching power supply apparatus for performing a switching control of a power MOS transistor that flows current to a coil and converting input voltage into output voltage, even if there occurs offset voltage in a current sensing operational amplifier, source potential of a current sensing MOS transistor is precisely kept at source potential of a low side power MOS transistor. For example, an offset cancel capacitor is arranged at an inverting input terminal of the current sensing operational amplifier, and voltage in the direction to offset the offset voltage occurring in the operational amplifier is charged to this capacitor.
摘要翻译： 在用于对电流流向线圈并将输入电压转换为输出电压的功率MOS晶体管的开关控制的开关电源装置中，即使在电流感测运算放大器中发生偏移电压，电流感测MOS的源极电位 晶体管被精确地保持在低边功率MOS晶体管的源极电位。 例如，偏移消除电容器被布置在电流感测运算放大器的反相输入端子处，并且将在运算放大器中发生的偏移电压偏移的方向上的电压充电到该电容器。
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公开(公告)号：US20060113979A1
公开(公告)日：2006-06-01
申请号：US11287293
申请日：2005-11-28
申请人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
发明人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
CPC分类号： H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A power supply driver circuit with low power losses and desired response characteristics with respect to changes in output and its miniaturization is provided. In a driver IC constituting a switched-mode power supply equipment controlling the switching, by pulse width modulation, of first and second power transistors passing a current in a coil, and outputting a voltage bucked or boosted from an input voltage, current sensing with desired responsiveness is enabled by providing a switching transistor between an inverted input terminal and a non-inverted input terminal of an operational amplifier, preventing, while the second power transistor is ON, the generation of a potential which is undefined when first power transistor is ON, i.e. when the second power transistor is OFF, and maintaining a node potential in a state in which the potential is well defined.
摘要翻译： 提供了一种具有低功率损耗和相对于输出变化及其小型化所需的响应特性的电源驱动电路。 在构成开关模式电源设备的驱动器IC中，通过脉冲宽度调制来控制通过线圈中的电流的第一和第二功率晶体管的输出，并输出从输入电压降压或升压的电压， 通过在运算放大器的反相输入端和非反相输入端之间设置开关晶体管来实现响应，防止当第二功率晶体管导通时产生当第一功率晶体管导通时未定义的电位， 即当第二功率晶体管截止时，并且将节点电位维持在其中电势良好定义的状态。
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公开(公告)号：US07138786B2
公开(公告)日：2006-11-21
申请号：US11287293
申请日：2005-11-28
申请人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
发明人： Takuya Ishigaki , Takashi Sase , Akihiko Kanouda , Koji Tateno , Ryotaro Kudo
IPC分类号： G05F1/613
CPC分类号： H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A power supply driver circuit with low power losses and desired response characteristics with respect to changes in output and its miniaturization is provided. In a driver IC constituting a switched-mode power supply equipment controlling the switching, by pulse width modulation, of first and second power transistors passing a current in a coil, and outputting a voltage bucked or boosted from an input voltage, current sensing with desired responsiveness is enabled by providing a switching transistor between an inverted input terminal and a non-inverted input terminal of an operational amplifier, preventing, while the second power transistor is ON, the generation of a potential which is undefined when first power transistor is ON, i.e. when the second power transistor is OFF, and maintaining a node potential in a state in which the potential is well defined.
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