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    • 8. 发明申请
    • VOLTAGE REGULATOR HAVING CURRENT AND VOLTAGE FOLDBACK BASED UPON LOAD IMPEDANCE
    • 具有基于负载阻抗的电流和电压回归的电压调节器
    • US20120187930A1
    • 2012-07-26
    • US13353995
    • 2012-01-19
    • Matthew WilliamsDaniel LeonescuScott DearbornChristian Albrecht
    • Matthew WilliamsDaniel LeonescuScott DearbornChristian Albrecht
    • G05F1/10
    • G05F1/5735
    • The regulated output voltage of a voltage regulator is maintained up to a current limit, Ilimit, then as the load impedance continues to decrease the output current does not increase past the current limit, Ilimit, but rather the output voltage decreases forcing the output current to also decrease to satisfy Ohm's Law: IOUT=VOUT/ZLoad. When the output voltage drops below the regulated voltage value because of current limiting the voltage regulator shifts from a current limit mode to a current foldback mode wherein the output current decreases with the decrease in output voltage until the output current reaches a current foldback minimum, Ifoldback, at an output voltage of substantially zero volts. As the load impedance increases so will the output voltage and current until the output voltage is back at substantially the regulation voltage value, and the output current is less than or equal to the current limit, Ilimit.
    • 电压调节器的稳压输出电压保持在电流限制Ilimit,因此当负载阻抗持续降低时,输出电流不会超过电流限制Ilimit,而是输出电压降低迫使输出电流 也降低到符合欧姆定律:IOUT = VOUT / ZLoad。 当输出电压由于电流限制而降低到调节电压值以下时,电压调节器从电流限制模式转换到电流折返模式,其中输出电流随着输出电压的降低而减小,直到输出电流达到当前折返最小值Ifoldback ,输出电压基本为零伏特。 当负载阻抗增加时,输出电压和电流将直到输出电压恢复到基本上的调节电压值,并且输出电流小于或等于电流限制Ilimit。