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    • 2. 发明申请
    • POWER SUPPLY UNIT
    • 供电单元
    • US20090212851A1
    • 2009-08-27
    • US12342710
    • 2008-12-23
    • Osamu YAMASHITAYasuhiko KokamiMasahiro IshiharaToshiyuki Tsunoda
    • Osamu YAMASHITAYasuhiko KokamiMasahiro IshiharaToshiyuki Tsunoda
    • G05F1/10
    • H02M1/32H02M3/158H02M2001/0009H02M2001/0025
    • High-accuracy overcurrent detection is performed, while a loss resulting from the current detection is significantly reduced. A switch section outputs the voltage between the both terminals of a current detection resistor using an AND signal between an output signal from a hysteresis comparator and an output signal from a pre-driver. The voltage is filtered by an electrostatic capacitor element and a resistor, and inputted to a comparator. The comparator makes a comparison between the signals inputted to the two input terminals thereof, and outputs the result of the comparison to a digital filter. When an overcurrent begins to flow in a power supply unit, the levels of the voltages inputted to the two input terminals of the comparator are inverted so that the comparator outputs an inversion signal to the digital filter. The digital filter outputs a detection signal to an overcurrent detection circuit when an arbitrary time has elapsed.
    • 执行高精度过电流检测,而由电流检测导致的损耗显着降低。 开关部分使用来自迟滞比较器的输出信号和来自预驱动器的输出信号之间的AND信号来输出电流检测电阻器的两端之间的电压。 电压由静电电容器元件和电阻器滤波,并输入到比较器。 比较器对输入到其两个输入端的信号进行比较,并将比较结果输出到数字滤波器。 当过电流在电源单元中流动时,输入到比较器的两个输入端的电压的电平被反相,使得比较器向数字滤波器输出反相信号。 当任意时间过去时,数字滤波器将检测信号输出到过电流检测电路。
    • 6. 发明申请
    • POWER SUPPLY UNIT
    • 供电单元
    • US20110063021A1
    • 2011-03-17
    • US12950161
    • 2010-11-19
    • Osamu YAMASHITAYasuhiko KOKAMIMasahiro ISHIHARAToshiyuki TSUNODA
    • Osamu YAMASHITAYasuhiko KOKAMIMasahiro ISHIHARAToshiyuki TSUNODA
    • G05F1/10
    • H02M1/32H02M3/158H02M2001/0009H02M2001/0025
    • High-accuracy overcurrent detection is performed, while a loss resulting from the current detection is significantly reduced. A switch section outputs the voltage between the both terminals of a current detection resistor using an AND signal between an output signal from a hysteresis comparator and an output signal from a pre-driver. The voltage is filtered by an electrostatic capacitor element and a resistor, and inputted to a comparator. The comparator makes a comparison between the signals inputted to the two input terminals thereof, and outputs the result of the comparison to a digital filter. When an overcurrent begins to flow in a power supply unit, the levels of the voltages inputted to the two input terminals of the comparator are inverted so that the comparator outputs an inversion signal to the digital filter. The digital filter outputs a detection signal to an overcurrent detection circuit when an arbitrary time has elapsed.
    • 执行高精度过电流检测,而由电流检测导致的损耗显着降低。 开关部分使用来自迟滞比较器的输出信号和来自预驱动器的输出信号之间的AND信号来输出电流检测电阻器的两端之间的电压。 电压由静电电容器元件和电阻器滤波,并输入到比较器。 比较器对输入到其两个输入端的信号进行比较,并将比较结果输出到数字滤波器。 当过电流在电源单元中流动时,输入到比较器的两个输入端的电压的电平被反相,使得比较器向数字滤波器输出反相信号。 当任意时间过去时,数字滤波器将检测信号输出到过电流检测电路。