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    • 54. 发明授权
    • Electronic apparatus having DC voltage conversion function, and DC voltage converter
    • 具有直流电压转换功能的电子设备和直流电压转换器
    • US07629712B2
    • 2009-12-08
    • US11264133
    • 2005-11-02
    • Yoshiyasu NakashimaSatoshi KazamaHideyuki MotoyamaShinichi YoshimotoKoichi YokotaHiroshi Yamada
    • Yoshiyasu NakashimaSatoshi KazamaHideyuki MotoyamaShinichi YoshimotoKoichi YokotaHiroshi Yamada
    • H02J1/00
    • H02J1/08H02J2001/008Y10T307/406Y10T307/469Y10T307/832
    • A voltage conversion circuit is provided for efficiently converting the voltage of a DC power source into a lower voltage in accordance with load currents of voltage converters. An electronic apparatus includes: a DC power source for supplying a first DC supply voltage; a first DC voltage converter for converting the first DC supply voltage into a second DC supply voltage which is lower than the first DC supply voltage; a second DC voltage converter for converting either the first DC supply voltage or the second DC supply voltage at an input voltage terminal thereof into a third DC supply voltage which is lower than the second DC supply voltage; a switch for selecting and supplying one of the first DC supply voltage of the DC power source and the second DC supply voltage of the first DC voltage converter to the input voltage terminal of the second DC voltage converter, in accordance with a control signal; a switching controller for providing the control signal to the switch; and a plurality of components, ones of the components receiving the second DC supply voltage, ones of the components receiving the third DC supply voltage.
    • 提供电压转换电路,用于根据电压转换器的负载电流将DC电源的电压有效地转换成较低的电压。 电子设备包括:用于提供第一DC电源电压的DC电源; 第一DC电压转换器,用于将第一DC电源电压转换成低于第一DC电源电压的第二DC电源电压; 第二DC电压转换器,用于将其输入电压端处的第一DC电源电压或第二DC电源电压转换为低于第二DC电源电压的第三DC电源电压; 用于根据控制信号向第二DC电压转换器的输入电压端子选择并提供直流电源的第一直流电源电压和第一直流电压转换器的第二直流电源电压中的一个的开关; 开关控制器,用于向开关提供控制信号; 以及多个部件,其中一个部件接收第二直流电源电压,其中一个部件接收第三直流电源电压。