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    • 4. 发明申请
    • Detecting currents in a switching regulator
    • 检测开关稳压器中的电流
    • US20050206359A1
    • 2005-09-22
    • US10804450
    • 2004-03-19
    • Paul DanielsDavid BienGerrit Foerstner
    • Paul DanielsDavid BienGerrit Foerstner
    • G05F1/40H02H7/12H02M3/156
    • H02H7/1213H02M3/156H02M2001/0009
    • A switching regulator provides energy to an inductor-capacitor combination that supply a DC voltage as an output. The presence of a current that can be significantly lower than the typical load current is detected using a pulse signal that provides a measure of the current supplied by the regulator to the inductor. A comparator compares this signal to a reference voltage that is related to the current level to be detected. This reference voltage is adjustable based on the voltage applied by the regulator and the voltage being ultimately supplied as the DC output voltage. The comparator and a capacitor perform an integration function that results in a voltage that ramps upward if the current threshold is being exceeded. When this ramping voltage passes a predetermined level, a signal is provided to indicate that the threshold has been exceeded.
    • 开关稳压器为提供直流电压作为输出的电感器 - 电容器组合提供能量。 可以使用提供由调节器提供给电感器的电流的量度的脉冲信号来检测可以显着低于典型负载电流的电流的存在。 比较器将该信号与与要检测的当前电平相关的参考电压进行比较。 该参考电压可以根据调节器施加的电压进行调节,并且电压最终作为直流输出电压供电。 比较器和电容器执行积分功能,如果超过当前阈值,则会产生向上斜坡的电压。 当该斜坡电压经过预定电平时,提供一个信号以指示阈值已被超过。