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    • 1. 发明授权
    • Switched power supply converter for broad range of input voltages
    • 开关电源转换器适用于宽范围的输入电压
    • US06777919B1
    • 2004-08-17
    • US10089797
    • 2002-06-26
    • Antonio Fontan TarodoJorge Gonzalez GonzalezAntonio J. Huertas Blazquez
    • Antonio Fontan TarodoJorge Gonzalez GonzalezAntonio J. Huertas Blazquez
    • G05F316
    • H02M3/335
    • Switched power supply converter for broad range of input voltages that comprises a first stage (11) connected in cascade with a second stage (21), such that a first voltage supplied from a voltage source is converted into a second voltage by means of a first switching element (11-3). The second voltage is transformed into a third DC voltage by the operation of the second stage (21). A control circuit (11-9) controls the duty cycle of the first switching element (11-3) so that the duty cycle varies between a first limit and a second limit of the duty cycle when the first voltage lies within a predetermined voltage range. The control circuit (11-9) sets the duty cycle to the first limit of the duty cycle or to the second limit of the duty cycle in the event of the first voltage being outside the predetermined range of voltage values.
    • 用于宽范围输入电压的开关电源转换器,包括与第二级(21)级联连接的第一级(11),使得从电压源提供的第一电压通过第一级 开关元件(11-3)。 控制电路(11-9)控制第一开关元件(11-3)的占空比,使得占空比在第二级(21-3)之间的占空比在 当第一电压处于预定电压范围内时的占空比的第一限制和第二限制。 控制电路(11-9)在第一电压超出电压值的预定范围的情况下将占空比设置为占空比的第一极限或占空比的第二极限。