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    • 72. 发明授权
    • Semiconductor device and power supply using the same
    • 半导体器件和电源使用相同
    • US08120345B2
    • 2012-02-21
    • US12388819
    • 2009-02-19
    • Noboru AkiyamaTakayuki HashimotoTakashi HiraoKoji TatenoTakuya Ishigaki
    • Noboru AkiyamaTakayuki HashimotoTakashi HiraoKoji TatenoTakuya Ishigaki
    • G05F1/00
    • H02M3/156H02M2001/0025
    • 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.
    • 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。